Shared Projects

Production version.

With Grit Control, LED pad, and board-mounted pots!

github.com/bkw777/MounT

Attach a Teensy to a “Model T” computer

AKA: TRS-80 Model 100, TANDY Model 102, 200, 600, NEC PC-8201, PC-8201A, PC-8300, Kyotronic KC-85, Olivetti M10

For Halloween 2020 / all parts needed printed on the board

Project documentation: https://github.com/juchong/ADI-IMU-Raspberry-Pi-Breakout-Board

A simple Raspberry Pi breakout board (hat) for Analog Devices IMUs.

This board makes interfacing ADI IMUs with any platform that has a 40-pin connector compatible with the Raspberry Pi standard.

Made during the covid pandemic when I couldn’t get my hands on a console SCART cable or THS series RGB amp for a bypass.

The top R/H resistors should be 20 to 25ohm 0805 for .7vpp output

You can get 20/22/24/25 it probably won’t make much difference - Likely to the decimal point on your overall output.

Please note: although developed for VA4 model 1 megadrive (hi def labels) I couldn’t get rid of the jail bars completely. This will be re-attenuated for other projects

Here is an installation guide for VA0/ VA1 model 2 megadrive/ genesis with MB3514 encoder:

https://drive.google.com/file/d/1IoJPfwR7FAysSQEvZguBW4gcg5gCceYv/view?usp=sharing

https://i.imgur.com/ul85WcJ.jpg
https://i.imgur.com/yfRSlh3.jpg

These are taken on a Sony PVM-2053MD on a 60hz modified PAL VA1/VA0 model 2 (can’t remember, they’re the same anyway) with all settings centered. It’s a $5 cable. It’s also using the CAT5/ BNC screwdown adapter to convert to PVM inputs which I’ve shared.

RF power amplifier

Yet another breakout.

BetsyBoard v0.9

For 3.9mm wide SOIC-14 ICs

Simple interface for HC-SR04 ultrasonic sensor to a Raspberry Pi to monitor sump water level.

Switcher and mute button between headset and 2 computers.

Version 2 changes: Switched to using Analog Devices audio switch https://www.analog.com/media/en/technical-documentation/data-sheets/ADG733_734.pdf halved the board size de-popping the mic when mute is activated added reverse-current protection diode

BOM: https://www.digikey.com/BOM/Create/CreateSharedBom?bomId=8390108 +100k resistors +controller button/switch (just put 5v to U to mute, 5v to 2 to switch to the second audio source)

Notes: PWR USB can be connected to a computer safely to provide 5v power to the board. CTRL USB should NOT be connected to a computer, but rather to a custom button/switch. I use a USB port because it’s cheap, 4-wire, and easily available. If the 5v logic lines from the custom button/switch are applied to a computer’s USB port, it could fry the port.

https://drive.google.com/file/d/1tA_uFtwSWMGxY5PEtWDTCb6ovqRQQvLh/view?usp=sharing

Wii Nunchuk Mod Chip for PC (USB)

Gitlab Project

Digikey Cart

16 pin DIP adapter to FuzzButton motherboard for legacy sample holders. Includes bottom Finish.

PCB for the PadSwitcher64 interface.

This interface allows the use of Super Nintendo compatible control pads with the Commodore 64 and 128.

See the GitHub for further information and software: https://github.com/Hojo-Norem/PadSwitcher64

toupee (althea daughterboard) to bring in one NIM signal and to drive another one out. corresponding LEDs as well.

Schematic: https://www.phys.hawaii.edu/~mza/PCB/althea/NIMIO-toupee.revA.schematic.pdf