microcontrollers
RFGEN44: An Open 4.4GHz RF Signal Generator on a PIC16
CircuitValley's RFGEN44 pairs a PIC16 with an ADF4351 to sweep 35MHz to 4.4GHz from a 65g box. Here's how to breadboard the same idea…
diy projects
PSU-EXT Makes Any Bench Power Supply Programmable via ESP32-S3
An open source ESP32-S3 box adds SCPI control, live current charts and protection limits to any 0-25 V bench supply, no teardown required.
diy projects
DOGS2: A Palm-Sized ESP32 Bench Lab You Can Build This Weekend
Sergei's DOGS2 stuffs a programmable power supply, logic probe, frequency counter, and signal generator into one palm-sized ESP32 box. Build it this weekend.