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Here’s a funny cheap lie detector you can make. I don’t know if it really works since there’s no circuit diagrams but you can find lots of lie detector circuit diagrams on the internet like this one I found in about 5 seconds:
Yes, these lie detectors probably won’t work on cats, maybe try dogs. 
via dailyapps
cats, Circuits, Circuits, circuit_diagrams, Computer, Computer, Consumer, Consumer, Cool, Cool, detector_circuit, dogs, DoItYourself!, DoItYourself!, Educational, Educational, Entertainment, Entertainment, Funny, Funny, Gadgets, Gadgets, Hack, Hack, lie_detector, lie_detectors, Video, Video
cats, Circuits, Circuits, circuit_diagrams, Computer, Computer, Consumer, Consumer, Cool, Cool, detector_circuit, dogs, DoItYourself!, DoItYourself!, Educational, Educational, Entertainment, Entertainment, Funny, Funny, Gadgets, Gadgets, Hack, Hack, lie_detector, lie_detectors, Video, Video
