The author’s goal was to build a huge floor piano using readily available and inexpensive materials. The result is astounding considering it was built entirely at home. The current version cost him $ 300 per octave (mainly...

  This project describes building a fully-featured 12 V PC fan PWM controller. The design can control up to 16 3-pin computer fans. The design uses a pair of Dialog GreenPAK™ configurable mixed-signal ICs to control each...

  Resin 3D printers are finally cheap enough that peons like us can finally buy them without skipping too many meals, and what means we’re starting to see more and more of them in the hands of...

  The robot arm uses three conventional PWM servos, and each angle is controlled by a variable resistor. The rotary potentiometer used B curve 10k ohm. Two DS3115 servo motors were used in the vertical direction, and...

  In this project, we see how to show Pulse Width Modulation (PWM) on an oscilloscope. Along the way we identify some ways to calibrate our oscilloscope probe(s), and our oscilloscope. Along with the detailed explanation, some...

  I’ve been working on a little ESP32 expansion board/shield for an LED project I’ve been working on. One of the nice things about the ESP32 is that it has a peripheral known as “LED control” that...

A new Raspberry Pi stepper motor and DC bonnet has being designed by Adafruit and is now available to purchase from their online store priced at $22.50. The Raspberry Pi bonnet can drive up to 4 DC...

  Based on the Fishino UNO board, a simple and funny project to...

Active-Semi Inc presents Hydra-X10 and -X20: 32-bit ARM Core microcontrollers. With the PAC 52xx ICs on Hydra-X, users can apply high power input voltage of 52V, which is perfect for motor projects. An interesting piece of work,...