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Here is a logic probe made out of some basic parts: A hex inverter, some resistors, transistors, and a paper clip that is acting as a probe. This ...
Below is a PCB layout explanation and a schematic. A drop down resistor was included for the first input of the hex inverter to prevent it from hanging ...
The PCB itself is 0.625 inches by 3.5 inches. The PDF of the artwork is included below. I filled in alot of the empty white space with some ...
I prefer to drill my holes with a hand drill. It just gives so much better control.
Populate your board and solder and you're done!
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