Some notes on how I efficiently rip cassette tapes using a Zoom field recorder. I'm using a Zoom H2N, but I'm guessing almost any modern field recording device would work.
Build your own contact microphones with a couple of cheap piezo elements and an old AUX cable
Learn how go make a passive loop antenna to listen to electromagnetic blips and buzzes in the world around you (similar to Priezor LOM)
A simple guide for non-technical folks who want to speed mod a tape player.
A simple DIY USB MIDI drum pad based on the Raspberry Pi Pico. It has a little screen, 16 non-velocity sensitive arcade-style buttons, and 3 potentiometers for volume / FX control.