Recent Projects

My grid-tie solar system is inherited. There is no need to subscribe (and pay) to get data.

Solar Electric System Monitor

bud-bennett Bud Bennett

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

Siemens SIKIT-DK 8080

This project implements a classic PDP8e (circa 1973) in an FPGA. The project is written in verilog, Front panel is included

PDP8e recreated in an FPGA

My second barn-door tracker, this time made from metal!

Barn Door Star Tracker: all-metal version

ZX Spectrum-compatible homemade retrocomputer based on Z80 CPU + discrete RAM and ROM + Raspberry RP2350B as ULA/chipset

Z80 + RP2350B ZX-compatible homebrew retrocomputer

Tiny ESP32-C3 desk gadget with OLED, live weather sensing, proximity glow & a phone-controlled web interface.

YUMO PULSE — ESP32-C3 Desk Gadget

yumobuilds YUMO.BUILDS

A hand-bent 1.5mm brass wire clock sculpture powered by ESP32-C3 with NTP time sync, hardware-multiplexed 7-segment display, and 5-stage SK

YUMO GLOBE

yumobuilds YUMO.BUILDS

A freeform brass wire sculpture featuring a round capacitive touch screen, 6-axis IMU auto-rotation, and reactive led filaments.

YUMO SMART CUBE: Touch screen/ESP32-S3 Brass Wire

yumobuilds YUMO.BUILDS

An ESP32-powered desk gadget with six round displays that appears to spin without any visible axle — the trick is mounting the frame on the

YUMO Roulette — A "Floating" Spinning Desk Gadget

yumobuilds YUMO.BUILDS

An industrial laser distance sensor based on the TF-Luna ToF module, successfully operating on a paving block production line.

Industrial Laser Distance Sensor

Bridging Real Commodore 64 Sound to Modern USB

USBSID-Pico

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

Tinta - low power wireless epaper device

A 1,216-parameter transformer written entirely in HyperTalk, trained overnight on a Macintosh SE/30.

MacMind: A Transformer Trained in HyperCard

Pocket ESP32 device that paces Morse code and broadcasts a peerless 2.4GHz distress beacon

SIGNAL:Pocket Morse Pacer & Emergency Beacon

Handheld AM / FM / SW receiver on ESP32-S3 and SI4732. SSTV, Morse, RSSI homing, and a web remote.

I Built a Radio That Turns Signals Into Pictures

Number sieves are machines that outran computers, 1920s-1990s. A 1982 design in ATtiny412s, aimed at factoring a 16-digit number.

A Tiny Sieve | Lehmer's Math Machine in ATtinys