The Raspberry Pi is famous for many of its features. On the one hand there is the size, performance and (at times when there is no shortage of components) also the price for such a small practical […]
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Category: Electronics
HowTo: Zigbee – Flash the Electrolama zig-a-zig-ah! (zzh!) USB stick coordinator with zigbee2mqtt firmware
In the article Zigbee – Preparing a Sonoff zigbee 3.0 USB Dongle Plus for zigbee2mqtt, I described how to write the firmware for zigbee2mqtt to a Zigbee stick from Sonoff. […]
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HowTo: Raspberry Pi – Evaluate MPR121 touch sensor via I2C and Node Red
Thanks to the I2C bus, the Raspberry Pi can be equipped with a variety of practical sensors and actuators. The MPR121 offers a (in my opinion) very elegant way for […]
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HowTo: pxlBlck – Flash firmware with esp web tools directly from the browser
Flashing the ESP8266 or ESP32 is not that easy if you have not had much contact with microcontrollers before. Now, there is something very cool that makes this process super […]
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HowTo: Raspberry Pi – Build NetworkAttachedStorage / NAS using a Raspberry Pi 4
For the past few years, I've mostly relied on Synology NAS as my home storage solution. These come with a nice interface and can be configured easily but also extensively. […]
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HowTo: Node Red - Control GPIO of an ESPEasy device
EspEasy and Node Red each offer a number of options for automation. You get even more options if you combine both systems. In the article ESPEasy – Execute commands and […]
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HowTo: pxlBlck – Build the pxlDigit_clock using the pxlDigit_PCB
I got the idea for the pxlDigit_PCB while building the pxlDigit (article here: https://nerdiy.de/howto-elektronik-seven-segment-digit-pxldigit-aus-ws2812-leds-bauen/). There the pxlDigit is made up of individual WS2812 LED segments. To do this, the LEDs […]
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HowTo: Anemosens – Build a 3D printed wind sensor / anemometer
To be honest, the idea of a 3D printable wind sensor (in technical jargon “anemometer”) has been floating around in my head for a long time. Initially I could have […]
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HowTo: ESPEasy - Setup time synchronization with the DS3231 / DS3232 RTC
Thanks to the NTP server, ESPEasy is able to call up the time via the WiFi connection. This option is very easy to set up and is described, for example, […]
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HowTo: PCB – Assemble the ButtonBoard PCB V1.2
The ButtonBoard PCB is my attempt to kill several birds with one stone. On the one hand, I've always been looking for a universal and easy-to-program remote control for the […]
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News: Okotober 2021 - Current projects
I think it's time again for a little news article in which I tell you what has happened in the last few weeks and what I'm working on. 🙂 Anemosens […]
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HowTo: PCB – Assembly of the Anemosens_MCU PCB
With the Aenmosens_MCU board it is possible to use Anemosens as a stand-alone anemometer, which can be used for long-term observations in remote areas (hence the microSD card slot) or […]
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HowTo: PCB – Assemble the Anemosens sensor PCB
The Anemosens sensor PCB is the basis for the sensor assembly of Anemosens, a 3D printed anemometer that I developed for the second version of WinDIY. For this purpose, on […]
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HowTo: PCB – Assembly of the pxlDigit_PCB
The idea for the pxlDigit_PCB came to me while building the first version of the pxlDigit (article here: https://nerdiy.de/en/howto-elektronik-sieben-segment-digit-pxldigit-aus-ws2812-leds-bauen/ ). The pxlDigit is built up from individual WS2812 LED segments. To […]
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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 […]
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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 […]
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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 […]
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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 […]
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News: PCB development - 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 […]
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HowTo: ESPEasy – Set up password protection, save and restore configurations
I'm 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. [...]
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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. thesis […]
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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 […]
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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 cannot only measure the temperature. The air humidity and […]
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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 [...]
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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 […]
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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 […]
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HowTo: ESPEasy – Connect the PCA9685 PWM port extension to the ESP8266
The PCA9685 is quite a practical IC. This is connected to the microcontroller (eg ESP8266) via I2C and can then control up to 16 individual PWM channels. You can control [...]
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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 […]
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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 […]
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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 […]
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