The Circuit Archive
Practical electronics and microcontroller tutorials. Moved to a new channel.
Practical electronics tutorials with a microcontroller slant: ESP32 frequency counters and PWM signal generators, TL494 boost-module builds, power-supply options for projects. The channel is dormant — no uploads in about a year — because the creator moved on to a new channel, @TheDesignGraveyard, with electronics and micro-controller videos every two weeks. The Circuit Archive back catalogue is still worth digging through.