Electronic Circuit Project

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If you want to test someone telling you the truth or not, you can use this simple lie detector. It’s easy to build. You need transistor, electrode, resistor, capacitor and analog ampere meter. This lie tester works by measuring skin resistance which goes down when you lie. For electrodes, you can use alligator clips, [...]

During testing circuit, it’s difficult use LED as indikator of logic probe. Another good option is using Audible Logic Probe. With this probe, Any input greater then 2 volts will be high and output a high tone through the speaker. Any input less then .8 volts will be low and produce a low tone through [...]