LED UV exposure box part 2, the timer

Buiding a timer for a PCB UV exposure box. […]

LED UV exposure box part 1, the box

Building a nice UV exposure box to make PCBs. […]

CoMBi Clock

A binary clock that displays hours minutes and seconds using colors on LEDs. Super difficult to read! […]

Linear LED power supplies

How to drive LEDs? WIth constant current supplies, of course. […]

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