A Raspberry Pi that transmits your TV's audio into Discord.
A make shift L network antenna tuner from junk parts.
I've been building an 8 bit microcomputer around the classic Intel 8085 processor. I found this excellent open source program, GNUSim8085, a "graphical simulator, assembler and debugger for the Intel 8085 microprocessor
No microcontrollers needed here! I was playing with some 7490 decade counters and decided to build a digital clock.