Various projects, some made with the hardware and software documented on this site
How to set up encrypted, de-duplicated backups with Duplicacy and a Raspberry Pi.
Interesting circuits based on a single semiconductor.
Electronic circuits need power. The simplest power supplies are batteries, and 5V USB power banks or adapters.
Some electronic circuits can oscillate in a “chaotic” way.
Read out an SMA 5000TL solar inverter via Bluetooth
Z80 & CP/M retro-computing with an EZ80 plus STM32F103
Re-implementing the venerable PDP minicomputers with modern hardware
All sorts of experiments with FPGAs on a range of low-cost boards
Periodically send a wireless data packet using energy harvested from a Current Transformer