Raspberry Pi Digital Clock in Python
A Raspberry Pi with a Waveshare 5" HDMI display as a digital clock: Raspberry Pi OS Lite, a minimal X11 with Openbox, and a Python GTK app that starts on boot.
Projects
Schematics, PCBs, firmware and everything that went wrong on the way to a working prototype.
Split-Rail Linear Power Supply ±15 V
A simple ±15 V split-rail linear power supply with the L7815 and L7915 for experiments with audio signals and low-power amplifiers.
Bench Power Supply with Three Adjustable Outputs
A desktop power supply with three adjustable outputs from 1.25 to 13.5 V, built from two old laptop adapters and LM2596 DC-DC modules.
Peak Voltage Detector for a Sine Wave Generator
Repairing a cheap panel voltmeter and building a µA741 peak voltage detector to show the output voltage of a sine wave generator.
Arduino Two-Channel Voltmeter with Thermometer
An Arduino Uno shield that measures two DC voltages up to 40 V and temperature, and shows them on an OLED display.