One of the first PCBs that I have tried to build as a 16 year old was a guitar pedal circuit from a German electronics magazine (Elo?).
I used the sun as a UV source for the photoresist exposure, boiled iron chloride in my mom's Pyrex containers, stained bunch of her towels permanently yellow in the process. And the circuit didn't work. It is still a sore point from my youth that I remember occasionally.
I used the sun as a UV source for the photoresist exposure, boiled iron chloride in my mom's Pyrex containers, stained bunch of her towels permanently yellow in the process. And the circuit didn't work. It is still a sore point from my youth that I remember occasionally.