An open-source infrared induction light control night light
https://maker.pro/pcb/projects/an-open-source-infrared-induction-light-control-night-light
In the schematic design, each feet use a method of resistance partial pressure to change the pin voltage, and the contro
DIY Precise Arduino Miliohmmeter
https://maker.pro/arduino/projects/diy-precise-arduino-miliohmmeter
Simple and inexpensive way to make such an instrument, with which we can measure resistances with a resolution of 1 milliohm.
Brushed DC Motor Programmable Speed Regulator
https://maker.pro/custom/projects/brushed-dc-motor-programmable-speed-regulator
This article explains how to design, build a low noise high performance low cost brushed DC motor programable speed regulator. The regulator is immune to the temperature, voltage, and motor load variation. Also, this circuit does not care about the motor coil resistance which allows using different motors in one application without any adjustments.