For assembly battery, a welding spot is nice to have. I develop this portable version, using super capacitor and recharged with standard 18650 battery

A single circuit to power a Raspberry Pi equipped with a hard disk.

This is a remake of the Simple Nixieclock (140013-1). After this project was published we got a lot of questions from our readers about changing the time zone, which was fixed to GMT+1 in the original design but could be altered in the source code of the PIC microcontroller.

An isolated USB to DMX512 converter. Isolated up to 1kv. Specific for light control. Works with Windows and MacOS, with open source DMX programs.

When silicon and music come to the rescue of plants.

Light beams are useful for sensing in all kinds of applications - if other light sources, often sunlight, don’t interfere. Here’s one way.

It is possible to solder SMD components by hand.

High voltage pulse generator to simulate electrostatic discharges

Battery capacity measurement using Arduino [Lithium-NiMH-NiCd]

RC Cross mixer for tracked vehicles, ships with two propellers, robots without the usual drawbacks. Basic Arduino MC with 328 processor (e.g. Nano)

Navtex, navigational telex, transmitted on 518 kHz is mandatory on commercial craft, but can be useful for leisure craft as well.

A user interface with LCD and rotary encoders for the Unilab2 power supply.

ESP32 - Digital Voltmeter using old style ADC conversion method.

A versatile PCB combining an STM32, an RFM95 LoRa Module and rechargeable batteries and that fits in a standard enclosure.

Motor driver board based on a Trinamic TMC2160 high-power stepper motor driver IC with SPI interface.

A Powerful 30A DC Motor Driver using Power Mosfets [PWM Controlled, Half Bridge]

A small SMT PCB for a micro power supply for small indoor devices using a solar panel. With coin cell clip as an alternate power source.

This is a mini-NTP based on a ESP32. Time will be provided from the GPS receiver and a DS3231 if no GPS-signal is avaliable, to server time to your networkcleints.

I am a hobby racer and want to modify my fuel maps and ignition settings (and more parameters) on outputs generated from my own analysis from a data logger. Not a Dynojet bench....but on the circuit itself. There are solutions and manufactures like: Rexxer, TunerPro, etc... who can do this. But i want to make it myself with elektronics and microcontrollers. CAN-bus is also an options.

Arduino OBD2 diagnostic tester supporting Diamex DXM and Pi-OBD (AGV) modules

Software updates for the ESP32 Weather Station (180468)