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PCB etched with toner transfer method
(lemmy.world)
This was my first try developing my own pcb with the toner transfer method. I did this project many years back but it works perfectly to this day.
It filters an audio signal and drives led strips so they pulsate to the beat of a song.
Nicely done. I have given up on toner transfer and instead use a laser attached to a 3D printer to burn away spraypaint.
Alignment on double sided boards is difficult though.
Interesting, how much power does the laser have to need to be able to burn the paint?
I'm using a 10W laser at about 25% of its power. It's a 450nm laser that is sold as 80W electrical power on AliExpress but Chinese webshops often exaggerate their specs.