Only a short time between the last episode and this one, so I didn't do a whole lot of stuff: spent 1 day volunteering at a local Home Computer Museum, decided on a project for the upcoming Retro Challenge 2018/04, went through all PCB-design I've ever made and made a list of common failures, and fixed a headphone with built-in microphone (that is, removed the microphone-part).

• HomeComputerMuseum (Helmond, NL)
• Retro Challenge 2018/04...
• ...and my entry for that
• IFcomp: interactive fiction competition

Here's a pic of the microphone/pushbutton thing on the mentioned headphone, with a circuit of what's actually going on:

(the cap is probably a 22 nF one though... Just blindly copied what the meter told me :-)