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  • HowTo: PCB – pxlBlck_multiPCB
    One of my past PCB projects is the “pxlBlck_multiPCB”. As the name suggests, this board is the heart of several future pxlBlck variants. So far I have used the Wemos D1 Mini Board with the ESP8266 built into it as the main MCU in many projects. The circuit is supplied via a micro USB connection. […]
  • News: June 2021 – My projects for the HackadayPrize 2021
    A few days ago the Hackaday Prize 2021 was announced. It became clear to me relatively quickly that I would like to try to submit a few of my projects again this year. The schedule was pretty tight. I had already read in the comments under the article on the HackadayPrize that the deadlines for […]
  • News: May 2021 – Current projects and developments
    At the moment it has become a little quieter here on Nerdiy.de. That was because I was working harder on developing a few new projects. Unfortunately, caring for the website or creating new articles often suffers as a result. But since the roughest plans have now been completed, this will soon change again. 🙂 Until […]
  • HowTo: 3D Printing – Rapid prototyping service of PCBWay.com
    I am currently working on a project that unfortunately exceeds the capabilities of my 3D printer. So far I was able to print all the necessary components on my 3D printer with the actually quite generously dimensioned print bed dimensions of 235x235mm. When the projects got bigger I simply split them up into several small […]
  • HowTo: pxlBlck – Build your own pxlBlck_CassetteLamp
    MP3 players, smartphones and USB sticks with 128GB and more memory are now part of everyday life. Storing and transporting music has therefore never been easier. About 30 years ago it looked different. The “USB stick of the 80s / 90s” was the cassette. Of course, I still have a lot of them flying around […]
  • HowTo: ESPEasy – Connect the APDS-9960 gesture sensor to the ESP8266 / ESP32 and read its values
    The APDS-9960 is a sensor that can be connected to a microcontroller such as the ESP8266 via the I2C bus. With the help of the sensor it is possible to recognize simple gestures, to measure the brightness, the distance of an object to the sensor and the color of the light hitting the sensor. The […]
  • HowTo: 3D printing – Build a Y-distributor for a 125mm exhaust hose
    While setting up the suction system for my soldering station and the chamber of my 3D printer, I was faced with the problem that I had to somehow split the suction nozzle of the suction system into two ways. The aim was to be able to control both the branch to my soldering station and […]
  • News: PCB-Entwicklung – I2C_mtrDrvr V1.0, servoDigitCtrlr, pxlBlck_multiPCB, XGZP6847_adapter and nanoPxl V1.4
    At the moment I am working on a few PCB projects in which I would like to give you a little insight here. 🙂 All of the boards presented in the following have been manufactured by PCBWay.com. They support my projects and have made the boards available to me. If you are looking for a […]
  • HowTo: ESPEasy – Set up password protection, save and restore configurations
    I am not sure whether ESPs can really be abused to set up a botnet. Either way, you shouldn’t neglect the issue of security, even with the small ESPEasy devices. The first small hurdle that should make it difficult for potential attackers or simply curious visitors to read or even change the configuration of your […]
  • HowTo: Node Red – Switch the Raspberry Pi screen on and off
    So that my MagicMirror is only switched on when I actually use it, I have configured a small automation using NodeRed. The screen is only switched on if movement is detected. The screen itself is switched on and off using the “vcgencmd” command. (More information here: https://www.raspberrypi.org/documentation/raspbian/applications/vcgencmd.md) With the following NodeRed code you can switch […]
  • HowTo: 3D printing – Build a solder fume extraction hose incl. funnel
    I also needed a suitable hose system to build my solder fume extraction system. After a little trial and error, I decided to use the standard exhaust air hoses. These are actually used to transport the exhaust air from extractor hoods or dryers. For the solder fume extraction system I decided to use a 125mm […]
  • HowTo: Node Red – Trigger actions via Windows shortcut / mouse click
    So that I can switch off my 3D printer automatically after the printing process, I installed a Sonoff relay so that it can interrupt the power supply to the entire 3D printer. The relay is then controlled via MQTT and automatically switches off the printer after the 3D printing is complete. The printer can be […]
  • HowTo: ESPEasy – Connect VL53L0X / VL53L1X distance sensor to the ESP8266 / ESP32 and read its data
    The VL53L0x or its sister / brother, the VL53L1X is a very precise and relatively inexpensive laser distance sensor. With this, distances can be measured almost at millimeter-accuracy. In one of my other projects (see ESPEasy – level sensor with VL53L0X / VL53L1X) I am already using this sensor to, for example, monitor the level […]
  • HowTo: ESPEasy – Connect the BME280 / BMP280 to the ESP8266 and read its data
    The BME280 is one of the sensors that I use in almost all of my projects. With this sensor one can not only measure the temperature. The air humidity and air pressure can also be measured with it. The BME280 is the perfect sensor if you want to measure the climate data of a room […]
  • HowTo: ESPEasy – Configure MQTT server on the ESP8266 and subscribe to topics
    ESPEasy can read out a large number of different sensors and / or control actuators (see also ESPEasy – Sensors & Actuators). With the help of the “Rules” it is then possible to react to this locally on the ESP and act accordingly. But the collected sensor data can also be sent to other devices. […]
  • HowTo: 3D printing – Build a servo-controlled 125mm butterfly valve
    I recently built an extraction system for my soldering station and the chamber of my 3D printer. The built extraction system has two connections. One of them sucks the air out of the 3D printer chamber with the help of a connected hose and thus ensures that the air in it is regularly freed of […]
  • HowTo: ESPEasy – Connect a rotary encoder to the ESP8266 and evaluate it
    Especially if your own circuit has a display to show values, the next step is often to connect an interface option. You can connect buttons or switches. A relatively cool way to equip your own circuit with an input option is the rotary encoder. At first glance, a rotary encoder looks like a potentiometer. In […]
  • HowTo: ESPEasy – Connect the PCA9685 PWM port extension to the ESP8266
    The PCA9685 is quite a practical IC. This is connected to the microcontroller (e.g. ESP8266) via I2C and can then control up to 16 individual PWM channels. You can control up to 16 LEDs, servos or motors with additional circuitry with just two (I2C) pins on the microcontroller. Especially when you want to control servos, […]
  • HowTo: Node Red – Control Spotify via NodeRed
    What I really appreciate about Spotify is the good connectivity. You can play or control music or podcasts on another device with just a few clicks. Thanks to the free possibility of setting up developer access, many of these functions can also be accessed from NodeRed. With a few cleverly linked nodes, you can easily […]
  • HowTo: Node Red – Display close by gas station prices on the dashboard
    Mit NodeRed bzw. den passenden Nodes könnt Ihr sehr leicht Daten aus dem Internet abrufen und aufbereitet anzeigen lassen. Ein praktischer Anwendungsfall dafür ist zum Beispiel der Abruf von Tankstellenpreisen aus der Umgebung und die automatische Darstellung in einer Tabelle. Der Webdienst Tankerkoenig.de bietet seine Daten netterweise kostenlos zum Abruf über seine API an. Mit […]
  • HowTo: Arduino – Build your own arduino timer “time_timy” to visualize a time period
    The 3D printed housing of the “pxlDigits” was initially not intended to be “just” a 7-segment display with WiFi. Originally I used it to build a kind of timer from a two-digit, 7-segment display for a friend of mine. She is a primary school teacher and had the problem that she needed a time display […]
  • HowTo: Electronics – Build seven segment LED digit called “pxlDigit” from WS2812 LEDs
    For another project I urgently needed a relatively large number to indicate a duration. From this this small “sub-project” emerged. Because with the 3D printed frame described here and a couple of WS2812 LEDs you can easily build a seven-segment number (or several) and use it to build displays to show numbers. Over time, I […]
  • HowTo: ESPEasy – Connect an LDR to the ESP8266 and read its value
    There are some situations in which connecting an LDR to an ESP makes sense. In this way, the brightness in a room can be measured relatively easily and for little money. This value can then be used, for example, to detect presence (has someone switched the light on even though I’m not at home?) Or […]
  • HowTo: pxlBlck – Display relative values as a BarGraph
    I started with the documentation of the pxlBlcks (which I had been postponed for a too long time) in November 2020 after Hackaday.com had announced the “GoodBye 2020” challenge. (More information here: https://hackaday.io/contest/175608-goodbye-2020/details) I had used the pxlBlcks for a long time, but as so often I never found the time / motivation to write […]
  • HowTo: 3D printing – Build a foot tambourine yourself
    Actually not one of the typical articles for Nerdiy.de, but recently I was looking for a tambourine that I could operate myself while playing the guitar. Long story short: Everything I found was either too expensive or not suitable. Therefore: do it yourself. 🙂 Instructions on how to build your own foot tambourine can be […]
  • HowTo: 3D printing – Build a foot rattle yourself
    When looking for a foot rattle to accompany guitar playing, I had the same problem as with the foot tambourine. So again: do it yourself. 🙂 Instructions for building your own foot rattle can be found in the following article. Inhalte1 Requirements2 Collect the parts you need3 Print the required parts4 Attach the elastic band5 […]
  • HowTo: pxlBlck – Build your own pxlBlck_RingClock
    The pxlBlck_RingClock is very similar to the pxlBlck_SlotClock. It is also built using a 1 × 60 LED matrix and can display the time according to the same scheme as the pxlBlck_SlotClock. However, the LED strip of the pxlBlck_RingClock is installed in a ring and not in a disc. This makes the design of the […]
  • HowTo: pxlBlck – Build your own pxlBlck_8x8
    The pxlBlck_8x8 was one of the first members of the pxlBlck family. Thanks to the few parts and the prefabricated WS2812 8×8 LED matrix, it is set up fairly quickly and thanks to the adapter board, it offers some expansion options that are not visible at first glance. With the help of the installed pxlBlck […]
  • HowTo: pxlBlck – Build your own pxlBlck_Pot
    The idea for the pxlBlck_Pot is heavily inspired by a design that Lukas (@i_am_lukas) had created. He agreed that I can use his basic design. Thanks again for that. 🙂 The pxlBlck_Pot is basically a 3D printed flower planter. A 32×8 WS2812 LED matrix can be inserted into this. The functionality of the pxlBlck can […]
  • HowTo: pxlBlck – Build your own pxlBlck_SlotClock
    The pxlBlck_SlotClock consists of a 1×60 LED matrix. It can display the time in the same way as an analog clock. The colors of the individual hands can be adjusted. Hour markers can also be displayed. This makes orientation and reading the time a little easier. 🙂 Animations can also be shown on the LED […]
  • HowTo: pxlBlck – Design icons, transfer them to the pxlBlck and display them
    I started developing the pxlBlcks because I was looking for a way to stay informed about events in the SmartHome. There are now two options integrated into the pxlBlck plug-in. In addition to being able to display animations, there is also the possibility of loading predefined icons onto the pxlBlck and displaying them there. These […]
  • HowTo: pxlBlck – Install and configure the pxlBlck plugin
    The pxlBlck plugin for the ESPEasy framework is the “software counterpart” to the pxlBlck platforms. With the plugin you can easily control the built-in LED matrices and with the help of the other functions it is relatively easy to display your own animations and notifications on the LED matrix. Inhalte1 pxlBlck platform2 Installation of the […]
  • HowTo: pxlBlck – Commands to configure the pxlBlck
    The pxlBlck plugin and the functions of your pxlBlck can be configured in two different ways. One possibility is to configure most of the functions via the plugin’s web menu. You can find a lot of information about this in the article pxlBlck – Install and configure the pxlBlck plugin In addition to this option, […]
  • HowTo: pxlBlck – Configure and display animations
    With the pxlBlck you can be informed about events in different ways. One of these possibilities is to be able to display previously set icons. Unfortunately, this option only works on LED matrices with a height greater than one, i.e. not on the pxlBlcks which “only” use an LED strip or a 1×60 LED matrix. […]
  • HowTo: pxlBlck – Configure watch faces and screensavers
    The adjustable dials differ from the type of LED matrix used. Unfortunately, this is the case because different LED-matrix sizes allow or do not allow different dials and screensavers. In order to give you a small overview of which dials are possible with which matrix, here is an idea of the adjustable dials and the […]
  • HowTo: pxlBlck – Automatic setting of the display brightness via LDR
    If you not only want to stay informed about events with your pxlBlck and also use it to display the current time, then it might be you noticed that a fixed display brightness doesn’t always match to every situation. Especially if you have your pxlBlck near a window, you have to set the display brightness […]
  • pxlBlck – An IOT/SmartHome information system
    pxlBlck is a system of hardware and software to set up an information system for the SmartHome. Various software and hardware options are available. Thanks to the integration in an ESPEasy plug-in, the pxlBlck’s can be automated without external automation software. In combination with external automation software (e.g. NodeRed, MQTT server, etc …), various notifications […]
  • HowTo: ESPEasy – Activate NTP time retrieval from the Internet
    Thanks to WiFi and thus (often) an internet connection, an ESP8266 or ESP32 programmed with ESPEasy also has the option to retrieve the actual time. In order for this to work, the retrieval of the time via an NTP server must first be activated in ESPEasy and a correct server configured. What you have to […]
  • HowTo: Electronics – Build waterproof 12V fairy lights yourself
    For a camping trip I was looking for a cheap and bright fairy light. This should be waterproof and bright enough to illuminate the tent properly. It would be perfect if the brightness could be adjusted. Since I didn’t find any of the existing fairy lights really fitting, I started to “develop” my own fairy […]
  • HowTo: Electronics – Encapsulate electronics waterproof with epoxy
    During the construction of a chain of lights, I was faced with the problem of how to get this chain of lights waterproof. Ultimately, I built the electronic components, which must not be exposed to moisture, in a 3D printed transparent housing. In order for them to be finally waterproof, the electronic components had to […]
  • PCB development – hubCtrlr, miniFloorLamp and nanoPxlV1.3
    Lately I’ve been working on various PCB projects and I would like to introduce a few of them here. Inhalte1 i2c_slider_752 miniFloorLamp PCB3 nanoPxl V1.34 hubCtrlr i2c_slider_75 With this PCB I want to reduce the wiring effort of WinDIY a little. The last build of the electronics (from WinDIY) consisted of a main board which […]
  • HowTo: Node Red – Fridge door monitoring by fridge energy consumption
    In the past few weeks I’ve had the problem that my freezer door didn’t close properly. As a result, at least one night, the refrigerator door was not properly closed for almost seven hours. When that happened to me (again) a few days later, I decided to do something about it. It would be enough […]
  • HowTo: ESPEasy – Use a PCA9685 and ESPEasy to control servos
    The PCA9685 is a PWM port expander. This makes it possible to connect up to 16 LEDs, servos or other components to your ESP8266 and supply them with a PWM signal. Thanks to ESPEasy (and the matching plug-in), controlling the PCA9685 is particularly easy. With the PCA9685, you can ultimately control up to 16 servos […]
  • How To: Raspberry Pi – Configure audio output
    The RaspberryPi can be equipped with a speaker in various ways. The easiest way is the connection via the 3.5mm jack plug. There is also the option of having the sound output via the HDMI connection. Ultimately, the sound can also be output via a connected USB speaker. This is particularly useful if you want […]
  • HowTo: Raspberry Pi – Use a Raspberry Pi with “Raspotify” as a Spotify speaker
    In the article RaspberryPi – Install “Shairport” Airplay-server on the RaspberryPi, I described how you can easily expand your RaspberryPi with the function of an AirPlay speaker. Thanks to another cool open source project, it is also possible to use your RaspberryPi as a Spotify speaker. All you need is a connected speaker, the appropriate […]
  • HowTo: Raspberry Pi – Install “Shairport” Airplay server on the Raspberry Pi
    Anyone who uses one (or more) Apple devices is certainly familiar with the AirPlay function. Thanks to this, media of all kinds can be streamed to other devices in the network. You can display photos on an AirPlay-enabled television, play videos or play music on AirPlay-enabled speakers. At least the latter can be easily achieved […]
  • HowTo: Tasmota – Flash Tasmota firmware to Sonoff iFan03 module
    There are some practical modules in the Sonoff range. This also includes the “Sonoff iFan03”. This is actually intended to be able to control ceiling fans and a connected lamp via remote control and WLAN. Like many other Sonoff modules, the iFan03 module can also be equipped with the free Tasmota firmware. How you can […]
  • HowTo: Node Red – Pushbullet notification at SSH login
    From the FritzBox I am used to being notified as soon as someone logs on to my FritzBox. I think that’s a great security feature. At some point I thought it would be nice if this feature were also available for the RaspberryPi. So I put together the solution below. When a login is recognized […]
  • HowTo: Tasmota – Flash Tasmota firmware using Tuya-Convert
    Flashing devices with the ESP8266 is already described in the article ESP8266 – Flashing .bin files under Windows with the “Esptool”. But many ready-made SmartHome devices such as various sockets offer a somewhat more convenient way of flashing an alternative firmware (for example Tasmota) without a soldering iron. All you need is a RaspberryPi and […]
  • Tasmota – Configure shut-off delay for relay-output
    Letting a relay run with a shut-off delay is actually a function that is used quite often. Unfortunately (at least until today) this is not so easy to implement with the Tasmota relays. A practical application for a shut-off delay is, for example, a bathroom fan.A bathroom fan is often paired with the bathroom light […]
  • HowTo: Node Red – Control FritzBox thermostat via Node Red
    I recently ordered one of the DECT radiator thermostats for the FritzBox out of curiosity. As usual with Fritz products, installation and commissioning were super easy. You don’t even need ten minutes for the installation. All kinds of options can then be set in the app and the FritzBox interface. Among other things, fixed times […]
  • HowTo: Node Red – Restart FritzBox via NodeRed Dashboard
    It doesn’t happen often, but sometimes restarting the FritzBox helps to fix problems in the network or with the internet connection. There are different ways to restart the FritzBox. You can log into the configuration interface of the FritzBox and trigger a restart via the corresponding menu entry, briefly disconnect the FritzBox from the power […]
  • HowTo: Electronics – nanoPxl V1.1 soldering SMD components
    I am currently working on the first preparations for a somewhat larger project. For this I need LEDs which shine a little brighter. At the same time, I didn’t want to forego the comfort of the well-known WS2812 aka Neopixel LEDs. For those who haven’t heard of it yet: These have the great advantage that […]
  • HowTo: Node Red – Automatic saving of the Node Red journal after starting Node Red (for debugging purposes)
    I recently had a problem with NodeRed that caused the NodeRed process to crash sometimes. Not really that bad because it is restarted automatically. On the other hand, it annoyed me at some point because the data in the dashboard view was lost and status messages were sent every time. So it was time to […]
  • HowTo: Node Red – View Linux login history
    It is known that almost all Linux commands can be executed with the help of NodeRed. What makes the whole thing particularly practical, however, is that you can then also process the returned data with the help of NodeRed. In the following article I use this to read the last Linux logins on my RaspberryPi […]
  • Nerdiskerator – Generator from the 3d printer
    A few days ago I posted the building instructions for a project of mine: WinDIY a 3D printed wind turbine. Even if I still have some work ahead of me, most of the functions of WinDIY are already working. What unfortunately has not yet worked is the main purpose of a wind turbine: generating energy. […]
  • News: PCB development – genCtrlr and nanoPxl
    Since I’ve started two new PCB projects lately, I thought it was time to write about them again. Inhalte1 genCtrl aka “NerdiskeratorController”2 nanoPxl – WS2812/SK6812 aka Neopixel-LED in bigger genCtrl aka “NerdiskeratorController” One of the side projects that arose from WinDIY and the Nerdiskerator is the controller board that I use to monitor the various […]
  • WinDIY – The wind turbine from the 3D printer
    On a camping trip away from modern infrastructure, you quickly notice how much you have gotten used to the fact that electricity is somehow available anytime and anywhere. The stupid: Most of the time you will realize this when the electricity is not there. For this case there are now power banks. But what if […]
  • HowTo: Nerdiskerator – Build the brake actuator
    The generator is held by a bracket in which a brake actuator is also integrated. In the following article you will find how you can proceed with its construction. Collect the parts you need You need the parts shown to assemble the brake actuator. For the assembly of just one actuator that follows, you only […]
  • HowTo: WinDIY – Assembling the prepared components
    So that the construction articles for WinDIY do not become too extensive, I have divided the construction into several articles. A certain component such as the wing built. Of course, these individual components have to be brought together at some point. This is what this article is about. This article is intended to support you […]
  • HowTo: WinDIY – Assemble the windvane
    The WinDIY wind vane is mounted at the end of the device carrier. It should help to align the wind turbine always in the direction of the wind. How you can set up the wind vane is described in the following article. Inhalte1 Requirements2 Collect the parts you need3 Assemble frame parts4 Assemble the base […]
  • HowTo: WinDIY – Assembling the pitch actuator
    One component that is supposed to make WinDIY more secure is the pitch actuator. It allows the wing’s angle of attack to be changed via a push rod. In case of an emergency (e.g. if the speed is too high) the angle of attack can then be changed so that the wind can no longer […]
  • HowTo: WinDIY – Build the turret mount
    The turret supports the turbine and the superstructure on the standpipe so that it can be rotated 360°. A slip ring is also integrated in it to transfer the generated energy to the non-rotating part of WinDIY. How you can proceed building the turret is described in the following article. Inhalte1 Requirements2 Collect needed parts3 […]
  • HowTo: WinDIY – Assemble the main axis
    The main axis is the axis in which the wind turbine will later rotate. It must therefore bear the weight of the blades including the hub and at the same time absorb the forces generated by the wind. Last but not least, it should rotate smoothly. A critical task and in my opinion one of […]
  • HowTo: WinDIY – Build the hub including mechanics
    At one point or another I have probably already mentioned that it was important to me to be able to control WinDIY safely and to be able to limit its speed in an emergency. This is why I developed a mechanism which allows to adjust the angle of attack of the wings. So the wings […]
  • HowTo: WinDIY – Assemble the Wind Turbine’s Wings
    An important component of WinDIY are certainly the wings. They absorb the energy of the wind and convert it into a rotary motion, which in turn feeds the generator and thus produces energy. Of course, the wings should be as light as possible. At the same time, however, they should be stable enough to withstand […]
  • HowTo: Raspberry Pi – Rotate screen output
    Especially if you have connected an external screen, it can happen that you are faced with the problem of wanting to rotate the screen output. A typical use case is, for example, when you use your RaspberryPi to build a MagicMirror. For this purpose, the screen is often hung up rotated by 90 °. Now […]
  • HowTo: Node Red – Shut down and restart Raspberry Pi
    Eine weitere praktische Sache in NodeRed ist, dass man auch übliche Linux Befehle bequem per NodeRed-Node auslösen kann.
  • HowTo: FritzBox – Fix the “TypeError: Cannot read property ‘actions’ of ‘undefined’” error in the “node-red-contrib-fritz” node
    For some time now I have had the problem that my “node-red-contrib-fritz” node cannot connect to my FritzBox. What confused me: Nothing really changed in the entire configuration before the error occured.. Nothing but the firmware version of FritzOS, the FritzBox operating system. At first I thought that AVM would have deactivated the interface that […]
  • Review: PCB Service of PCBWay.com
    It’s been a while since PCBWay asked me to test their PCB manufacturing service. This was a perfect opportunity to have the circuit board for the “mobileSupply” project manufactured . “mobileSupply” is supposed to be a kind of power bank for the bike. The special thing about it is that this power bank can also […]
  • News: Summer 2020
    Dear visitor of Nerdiy.de, I’ve decided to post a little update from time to time (probably four times a year) about what’s going on in the background on Nerdiy.de. This is my first entry. So of course I would be happy to receive any critic. Let me know what else interests you or what you […]
  • pxlBlck – Alle Infos für Tester des neusten Pre-Release
    Liebe Tester,zu allererst vielen Dank, dass Ihr Euch bereit erklärt habt das pxlBlck Plugin zu testen. 🙂 Im folgenden versuche ich alles aufzulisten, dass Ihr für die Installation und den Betrieb des Plugins benötigt. Wenn etwas fehlt erwähnt das bitte einfach in der Kommtnarfunktion ganz am Ende der Seite. 🙂 Inhalte1 Voraussetzungen2 Installation des Plugins3 […]
  • HowTo: ESPEasy / Wemos D1 Mini – Adapt ADC to another maximum voltage
    You can measure voltages using the ADC on the ESP8266. This is useful, for example, to measure a battery voltage and thus the state of charge of the battery or a brightness using an LDR and a series resistor. The ADC of the ESP8266 is somewhat special. Without additional external wiring, this can unfortunately only […]
  • HowTo: ESPEasy – Connect VL53L0X / VL53L1X distance sensor to the ESP8266 / ESP32 and read its data
    I recently stumbled across the VL53L0X and VL53L1X TOF distance sensors. These sensors can determine distances with millimeter accuracy using a laser. In addition, they have a range of up to 4m (VL53L1X9 or 2m (VL54L0X). I found the sensors very interesting and of course I ordered a few directly. It doesn’t hurt to have […]
  • HowTo: Mechanics – Cut internal thread
    Whenever possible I try to use finished nuts or thread inserts when using screws and the like. But sometimes there is simply no other way and you have to cut a thread into a material yourself. 🙂 That sounds a bit complicated at first but is really not difficult. Here comes a small series of […]
  • Code snippet: Arduino – Activate I2C broadcast reception
    I2C is the bus protocol or technology via which a microcontroller can communicate with many sensors or actuators. Thanks to the right software, you can also connect and communicate with different microcontrollers. There is usually only one master per I2C bus that can request or send data from a slave via the corresponding address. In […]
  • Nerdiy.de is (finally) online
    Now I’m starting an article for the second time in which I write that Nerdiy.de will open soon. The last article (https://www.nerdiy.de/was-soll-das-hier-was-mache-ich-hier-und-wo-soll-das-alles-mal-hinfuehren/) is more than two years old. I also recently noticed that I registered the domain three years ago. So you see: I’ve been working on this project for a long time. In between, […]
  • HowTo: ESP8266 – Flashing .bin files under Windows using “Esptool”
    The actual flashing of firmware files such as .bin files or “binarys” on the Wemos D1 Mini, the NodeMcu dev board or any other board that is based on the ESP8266 takes place completely in the background of the Arduino IDE. Behind it is actually the “esptool” offered by Espressif – the manufacturer of the […]
  • HowTo: Electronics – correctly dimension power supplies and understand their data sheet
    You need power supplies almost in every project, because someone needs to deliver the energy for your project. 🙂 There are some things to consider. On the one hand, you do not want to put yourself or others at risk, and on the other hand, the built project should run successfully with it. It is […]
  • HowTo: “Decore” lightbulbs
    In some articles it has already been pointed out that old light bulbs can easily get a new “lamp life”. For this, however, the filament, its holder and parts of the threaded socket must be removed in almost all cases. How you can do this is described in the following article. Inhalte1 Requirements2 Security3 Remove […]
  • HowTo: Node Red – Control the Facebook(*)-Lamp
    The article NodeRed/Tasmota – Building a Facebook(*) Icon Lamp explains how to build your own Facebook (*) lamp. The goal is to link these later with your SmartHome and, for example, to light up as soon as new notifications are available for you. With the following NodeCode you can now test your self-made Facebook (*) […]
  • How To: Node Red – Supply Nerdiys PanelMeter with weather data
    In the articles Build a retro-smart home display via analog displays and ESPEasy – Install and configure the Nerdy PanelMeter plugin was described what you need to do to build your own retro-smart home display. If everything works, you are on a good way. But to make your display really useful, you have to feed […]
  • How To: Node Red – Control the WhatsApp(*)-lamp
    In the article NodeRed/Tasmota – Building a WhatsApp(*) Icon Lamp explains how to build your own WhatsApp (*) lamp. The goal is to link these later with your SmartHome and, for example, to light up as soon as new notifications are available for you. With the following NodeCode you can now test your own WhatsApp […]
  • HowTo: Node Red – Control the Instagram(*)-Lamp
    The article NodeRed/Tasmota – Building an Instagram (*) icon lamp explains how to build your own Instagram (*) lamp. The goal is to link these later with your SmartHome and, for example, to light up as soon as new notifications are available for you. With the following NodeCode you can now test your selfmade Instagram […]
  • How To: ESP Easy – Install and configure the Nerdy PanelMeter plugin
    In the article Build your own retro SmartHome display via analog displays, is explained how to assemble your own Retro SmartHome display. But unfortunately even the best hardware is nothing without the right software. So that you can control the analog displays and the associated LED’s comfortably, you can use the following ESPEasy-Plugin. This enables […]
  • HowTo: ESPEasy – execute commands and actions via HTTP, MQTT, UDP and directly
    One thing that makes ESPEasy so practical and universal is the ability to read and control various sensors and actuators via commands. Especially in combination with appropriate rules, this results in a tremendous number of possibilities. To test individual commands and / or to be able to execute them in general, there are several possibilities. […]
  • HowTo: ESPEasy – Compile firmware, flash and configure WiFi access data
    Each project consists not only of many important hardware components but also of the appropriate software. It is often less work to assemble the project than to write the appropriate software later. But thanks to some open source projects this work can be saved. One of them is the often mentioned Tasmota firmware. Another is […]
  • How To: Register Google Maps API Key
    Google offers many of its services up to a certain limit for free. For example, it is also possible to access the Google Maps functionality. This is useful, for example, for cases such as those described in the article MagicMirror – Display Current Traffic Overview. Here you can have a local traffic overview displayed on […]
  • Basics of navigation in Windows Explorer
    For many, using Windows Explorer is probably the ultimate foundation. You can not really get past him as a Windows user. No matter if you just write a letter, sort the holiday photos or surf the internet. Above all, Windows Explorer is always first. Therefore, in the following article are a few tips and tricks […]
  • HowTo: Electronics – My friend the soldering iron
    Even as a part-time nerd you will not really get around the soldering iron in the long run. At the latest, when the first test circuit on the breadboard has worked well and you want to take the next circuit evolutionary step, it’s time to swing the soldering iron. As a child, I had terrible […]
  • HowTo: Electronics – Loosen solder joints, clean and remove components
    Wer den Artikel Elektronik – Mein Freund der Lötkolben bereits gelesen hat, hat vllt. gemerkt, dass man über dieses Thema tatsächlich ziemlich viel schreiben kann. Und dabei geht es nur um das korrekte verbinden zweier Kontaktflächen. Das trennen dieser bereits verbundenen Kontaktflächen ist dagegen nochmal eine ganz andere Sache. Bei einfachen Bauteilen und verbundenen Leitungen […]
  • HowTo: Node Red – Creating a User Interface with Dashboard Nodes
    I don’t know if dashboards are THE means to make a nerd’s heart beat faster, but they are certainly one way to make a nerd’s heart beat faster. For those who grew up with StarTrek and Co., dashboard-like overviews in the form of diagrams and graphics are the epitome of technology. This feeling can now […]
  • HowTo: Electronics – The Functions of a Multimeter (Use for Troubleshooting)
    Voltmeter, amperemeter, ohmmeter or as a “compact device” = multimeter are the ultimate life or at least a good mood savior if the self-made circuit does not work. Sometimes it just happens that although you have kept to a detailed construction plan, the built circuit still does not work. At least then you sit very […]
  • HowTo: ArduinoIDE – Install a library
    The great thing about the concept behind the Arduinos is that in many cases you can benefit from the work of others. It does not matter which sensor you read or which actuator you want to drive: This has certainly someone else done before you. Most of the time, these people have written libraries that […]
  • HowTo: GitHub – How to copy files from a git-repository to my computer
    Especially in the open source world you will sooner or later stumble on GitHub, GitLab or similar online-services with “Git” in the name – in search of program code. Behind it hides various companies/websites/organizations that offer something similar.All these providers offer on their websites/servers the opportunity to make software projects available online and continue to […]
  • HowTo: FHEM – Structure, Modules & Worth Knowing
    After installing FHEM for the first time and the configuration page was reachable, the euphoria was great. After I had clicked on it a bit, this euphoria was quickly replaced by helplessness. FHEM is a powerful and very well maintained tool to connect different home automation devices. Unfortunately, it’s one thing not: Intuitive. In my […]
  • HowTo: FHEM – Secure access to the configuration interface
    At least after you have done the first configurations in your FHEM interface you should also deal with the topic of security. It is really annoying if you lose the laboriously collected and neatly programmed functions of your SmartHome system. Be it through data loss or because other people have gained unauthorized access to your […]
  • HowTo: Electronics – Solder SMD components by hand
    After soldering THT components, soldering SMD components is the supreme discipline among the soldering challenges. The difficulty increases with the decreasing size of the components. SMD stands for “Surface Mounted Devices” and is sometimes referred to as “SMT”, which means “Surface Mounted Technology”. Both terms refer to an assembly technique in which electronic components are […]
  • HowTo: Electronics – Commissioning a new circuit
    After the last component of a kit or the first prototype of your own circuit is done, you are often excited and impatient. Sometimes at this point you have two, three or more hours of often fiddly and highly concentrated work behind you. So now comes the long-awaited reward in the form of a perfectly […]
  • HowTo: FHEM – Create MQTT Devices
    In the article RaspberryPi – Install MQTT Server on the RaspberryPi I had written a little to MQTT and explained how to install a separate MQTT server on the RaspberryPi. In order to be able to use an MQTT server also from FHEM, you still have to install a few FHEM modules. How to do […]