Mini Digital Voltmeter
If you want to measure voltage with a voltmeter or multimeter, you normally need two hands. But usually you only have one hand free. You …
Category: Hardware
Using a barrel jack as a switch
In many everyday devices, such as battery-operated radios, lamps, torches and especially laptops, a barrel jack is used for the power supply. In these cases, …
WeMos D1 R2 – Host entire website with html, css & js
The first part of the WeMos series explained the setup and Wi-Fi integration. Building on this, this article describes step by step how to host …
3D printed bit adapter square / hexagon
I bought a socket spanner box (1.0.1-1.0.3) with 50 or 150 pieces and thought I was set for the rest of my life. But unfortunately, …
DIY powerbank with voltage regulator and voltmeter
After building a simple powerbank, I now decided to combine a step-up module XL6009 with my existing powerbank. Fortunately, I had already constructed and tried …
Glare free lamp and powerbank
I bought a new 3D printer with a closed build chamber. At some point I noticed that one of the two extruders was clogged. The …
3D printed Dupont connector for jumper cable
Many DIY projects are accompanied by chaos at the workbench. Screwdrivers, soldering irons, jumper cables, everything lies all over the place. Clean up is usually …
WeMos D1 R2 setup and wifi integration
I have often thought that it would be extremely convenient to connect my Arduino projects with the Wi-Fi. At some point I randomly came across …
Improved LM2587S voltage converter (Step-Up Modul DC-DC)
I found some more possibilities to use the LM2587S voltage converter (step-up DC-DC module) after the development of the first case. The module is extremely …
Review Battery Shield V3 – DIY Powerbank with LiPo 18650
I was looking for a battery with a battery management system for my outdoor projects (weather station, irrigation system, etc.). While browsing online stores, I …