Adapter to get 5vdc from the BCR port on TRS-80 Model 100 and similar computers, and provide it on a standard usb port.
A modification for Korg's Monotron Delay, which makes it accept standard Eurorack CV voltages (Pitch, Gate and Cutoff CV). The mod also provides an option to power the monotron via micro-USB.
ESP32 DVD pen plotter with HW-130 L293D shield: custom firmware, socket-plug wiring, USB/Bluetooth G-code
Custom 4-layer interrupter control board for DRSSTC systems. STM32F405-based, fiber-optically isolated outputs, hardware E-brake safety chain, and controlled-impedance routing (90Ω USB, 50Ω FSMC/SDIO). Designed in KiCad 9.0.
Development/eval board for Lattice MachX02 FPGA, TPS543320 & TPSM8282 DC-DC converters, and FTDI2232H USB-JTAG chip.
This repo includes all software necessary to operate the Test Rover Platform that is being designed and developed in the 502 project.