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 - Electrolama zig-a-zig-ah! (zzh!) Coordinator USB stick with zigbee2mqtt firmware flashing
In the article Zigbee - Preparing a Sonoff zigbee 3.0 USB Dongle Plus for zigbee2mqtt I have described how to prepare a Sonoff zigbee stick with the firmware for zigbee2mqtt [...]
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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 many practical sensors and actuators. One (in my opinion) very elegant possibility for user input is the MPR121. The [...]
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HowTo: pxlBlck - flashing firmware with the esp web tools directly from the browser
Flashing the ESP8266 or ESP32 is not so easy if you haven't had much contact with microcontrollers before. But there is now something very cool that makes this process [...]
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HowTo: Raspberry Pi - Build your own NetworkAttachedStorage / NAS with a Raspberry Pi 4
For the last few years, I've mostly relied on Synology NAS for home storage. These come with a fancy interface and can be configured easily but also in detail. Unfortunately, [...]
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HowTo: Node Red - Controlling GPIO of an ESPEasy device
EspEasy and Node Red each offer some automation possibilities on their own. But you get even more possibilities if you combine both systems. In the article ESPEasy - [...]
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HowTo: pxlBlck - build pxlDigit_clock with the pxlDigit PCB
The idea for the pxlDigit_PCB came to me during the construction of the pxlDigit (article here: https://nerdiy.de/howto-elektronik-sieben-segment-ziffer-pxldigit-aus-ws2812-leds-bauen/). There the pxlDigit is built from single WS2812 LED segments. For this, the LEDs must first be inserted into the 3D [...].
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HowTo: Anemosens - Building a 3D printed anemometer (wind sensor)
To be honest, the idea of a 3D printable wind sensor (in technical jargon "anemometer") has been floating around in my head for quite a long time. Initially, I could have used it as a wind sensor for one of my weather stations [...].
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HowTo: ESPEasy - Set time synchronization with the DS3231 / DS3232 RTC
Thanks to NTP server ESPEasy is able to retrieve the time via WiFi connection. This possibility can be set up very easily and is described for example here: ESPEasy - NTP time retrieval [...]
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HowTo: PCB - Build ButtonBoard PCB V1.2
The ButtonBoard PCB is my attempt to kill several birds with one stone. On the one hand I was always looking for a universal and easy to program remote control [...]
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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 - Anemosens_MCU PCB assembly
With the Aenmosens_MCU board, it is possible to use Anemosens as a standalone anemometer that can be used for long-term observations in remote areas (hence the microSD card slot) or as another part of your weather station (hence the RS485 interface) [...]
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HowTo: PCB - Building the Anemosens Sensor PCB
The Anemosens sensor PCB is the basis for the sensor setup of Anemosens a 3D printed anemometer that I developed for the second version of WinDIY. For this purpose on the PCB are [...]
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HowTo: PCB - Building the pxlDigit_PCB
The idea for the pxlDigit_PCB came to me during the construction of the pxlDigit (article here: https://nerdiy.de/howto-elektronik-sieben-segment-ziffer-pxldigit-aus-ws2812-leds-bauen/). There the pxlDigit is built from single WS2812 LED segments. For this, the LEDs must first be inserted into the 3D [...].
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HowTo: PCB - pxlBlck_multiPCB
One of my past PCB projects is the "pxlBlck_multiPCB". As the name suggests this PCB is the heart of several future pxlBlck variants. So far I have used as main MCU for many projects the [...]
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News: June 2021 - My projects for the HackadayPrize 2021
A few days ago the Hackaday Prize 2021 was announced. Relatively quickly it was clear to me that I would like to try to submit a few of my projects again this year. Thereby [...]
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HowTo: pxlBlck - build pxlBlck_CassetteLamp
Meanwhile, MP3 players, smartphones and USB sticks with 128GB and more memory are part of everyday life. Storing and transporting music has therefore become easier than ever. About 30 years ago [...]
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HowTo: ESPEasy - Connecting the APDS-9960 gesture sensor to the ESP8266 / ESP32 and reading it out
The APDS-9960 is a sensor that can be connected to a microcontroller like the ESP8266 via the I2C bus. With the help of the sensor it is possible to recognize simple gestures, which [...]
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News: PCB development - I2C_mtrDrvr V1.0, servoDigitCtrlr, pxlBlck_multiPCB, XGZP6847_adapter and nanoPxl V1.4
Currently I am working on a few PCB projects in which I would like to give you a little insight here 🙂 All in the following presented boards have manufactured at PCBWay.com. These [...]
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HowTo: ESPEasy - ESPEasy - Set up access password, backup and restore configurations
I am not sure if ESPs can really be misused to build a botnet. Either way, security should not be neglected even with the small ESPEasy devices. [...]
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HowTo: 3D printing - build your own solder fume extraction hose incl. funnel
For the construction of my solder fume extraction system I also needed a suitable hose system. After some trial and error I decided to use the standard exhaust hoses. These are actually used to connect the [...]
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HowTo: ESPEasy - Connecting the VL53L0X / VL53L1X distance sensor to the ESP8266 / ESP32 and reading it out
The VL53L0x or its sister/brother, the VL53L1X is a very accurate and relatively inexpensive laser distance sensor. With this, distances can be measured almost to the millimeter. In one of my [...]
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HowTo: ESPEasy - Connecting BME280 / BMP280 to the ESP8266 and reading it out
The BME280 is one of the sensors I use in almost all my projects. With this not only the temperature can be measured. Also the humidity and the air pressure [...]
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HowTo: ESPEasy - Configure MQTT Server and Subscribe to Topics
ESPEasy can now read out very many different sensors and / or control actuators (see also ESPEasy - Sensors & Actuators). With the help of the "Rules" can then locally on the ESP [...]
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HowTo: 3D Printing - Building a servo controlled 125mm butterfly valve
I recently built an exhaust system for my soldering station and the chamber of my 3D printer. The built exhaust system has two connections. One uses a connected hose to suck up the [...]
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HowTo: ESPEasy – connect the rotary encoder to the ESP8266 and evaluate it
Especially if your own circuit has a display to show values, the next step is to also connect a control option. You can connect pushbuttons or switches. A [...]
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HowTo: ESPEasy – Connect and control the PCA9685 PWM port extension to the ESP8266
The PCA9685 is a quite practical IC. It is connected to the microcontroller (for example ESP8266) via I2C and can then control up to 16 individual PWM channels. So you can [...]
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HowTo: Arduino - Build timer "time_timy" for visualization of time durations
The 3D printed case of the "pxlDigits" was not intended to be "only" a 7-segment display with WLAN. Originally I made a kind of timer out of a two-digit 7-segment display for [...].
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HowTo: Electronics - Building seven segment digit "pxlDigit" from WS2812 LEDs
For another project I urgently needed a relatively large digit to display a time duration. This small "sub-project" ultimately arose from this. Because with the 3D printed frame described here [...]
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HowTo: ESPEasy – Connect and read LDR to Wemos D1 Mini
There are some situations in which the connection of an LDR to an ESP makes sense. This is because it is relatively easy and for little money to adjust the brightness in a room [...].
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