Recent Projects

A computer built around a real Zilog Z80, wrapped in an FPGA bus arbiter, STM32 supervisor and RP2350 VDP. With my own architecture.

Z-Frame

7-segment displays A hand-bent brass wire sculpture, clock powered by ESP32-C3 with NTP time sync.

YUMO GLOBE - Digital Clock

yumobuilds YUMO.BUILDS

An ESP32-powered desk gadget with six round displays, with one touch its start spinning.

YUMO Roulette — A "Floating" Spinning Desk Gadget

yumobuilds YUMO.BUILDS

How to design and make a high performance,ultra small,rf bandpass filter-possibly the smallest connectorized RF bpf filter to buy anywhere

Design a 915MHz ultra small rf bandpass filter

I Built the Ultimate Retro Raspberry Pi 5 Case (Full I/O Access!)

Callisto 3 - Pi5 Powered Retro style PC

unit-7101856 unit 7101856

Sentry-compatible observability, written in Rust.

Metric

codecontaining-product CodeContaining Product

Stock 80'ies Swedish CRT videotex terminal, back on a phone line it thinks is real. SLIC, V.24, and an AI agent on the far end.

Terminal Rings You Back: Swedish TeleGuide Revival

johanneswiig Johannes.wiig

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

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

Emulating the Small Scale Experimental Machine (SSEM) aka the Manchester Baby, the first computer capable of executing a stored program.

Small Scale Experimental Machine (SSEM)

pBASIC65c02 - 1kByte 65c02 Tiny BASIC

Can we build a non-IL Tiny BASIC in <2kbyte for 6502?

uBASIC6502 - 2kbyte Tiny BASIC for Bell 80-513

Projects which are using ESP32 microcontroller

My ESP32 Projects

An operating system written in Java

A guid to build a JavaOS

Building a home hifi component from scratch was a very early dream. There was finally an excuse to do it.

Ultimate stereo amplifier

lion-mclionhead lion mclionhead

What if Commodore had never gone bankrupt and Amiga development had never stopped?

Project Ceylon: What If the Amiga Never Died?