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PCB etched with toner transfer method(lemmy.world)

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bistdunarrisch@lemmy.world
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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.

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Rolivers@discuss.tchncs.de
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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.

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bistdunarrisch@lemmy.worldOP
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Interesting, how much power does the laser have to need to be able to burn the paint?

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Rolivers@discuss.tchncs.de
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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.

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