Recent Projects

Limits the high starting current and allows the motor to start more smoothly.Allows the motor speed to be adjusted using a potentiometer.

Soft Start & Speed Control for Angle Grinder

A few months ago, a client walked into our office with a dusty 1980s cassette deck.

Case Study: Reviving a Vintage Cassette Deck

himanshu-dada Himanshu Dada

compact, energy-efficient, battery-powered system for ePaper-based display of information gathered via Wi-Fi

Tinta - low power wireless epaper device

A complete low-power gamma ray spectrometer that can be used by itself or integrated into other projects

Pomelo: Gamma Spectroscopy Module

mihaicuciuc mihai.cuciuc

Battery-powered CO₂ monitor with SCD41 and ESP32-C3, LED air-quality indication, web logging, graphs and standalone Wi-Fi mode.

DIY CO₂ Monitor with ESP32-C3 and SCD41

A 16 KiB compatibility BIOS makes a Tomy Tutor/Pyuuta run TI-99/4A cartridges on its real 1980s video, sound, and CPU hardware.

Silicon Cousins: TI-99 Software on a Tomy Tutor

jon-guidry Jon Guidry

Aquatic apex predators with directed energy weapons. For when ill-tempered mutant sea bass just won't do.

Sharks with frickin' laser beams on their heads

Wanted to build a rolling ball robot that was like the pop from Arc Raiders. This is my journey into making a prototype.

Rolling Ball Robot

compact alphanumeric split-flap display

Mini Split-Flap Display

svofski svofski

Open hardware and firmware that sit inline with a bench power supply, adding live measurement, protection, and SCPI control.

PSU-EXT

dzmitry-dydyshka Dzmitry Dydyshka

This mid-70s version of the Arduino needs to be put together and then put to work!

Siemens SIKIT-DK 8080

Z8001 with 16K to 64K SRAM

VMEbus Z8001 CPU

A tiny FPGA-resident programmable sequencer that controls time and space directly

PTSG — Programmable Timing Sequence Generator

tsuneoohnaka Tsuneo.Ohnaka

ESP32/PC SINAD indicator exploring filters, ADC limits, and practical receiver evaluation.

A DIY Digital SINAD/Waveform indicator on ESP32/PC

A Commodore 64/VIC-20 distributed cluster using 1541 drives as compute nodes for Monte Carlo π calculations.

C64/VIC-20 + 1541s Distributed Monte Carlo

oleg-farenyuk Oleg Farenyuk

Free, web based, industrial robot simulator with plugin system that enable users to add custom functions, post processors for real robots.

BabaCAD Robotics online simulator

mirza-coralic Mirza Coralic