Monday, 2 March 2015

Voltage Probe with Tone and LED Outputs

14:44  Telli k  No comments

A voltage probe can be very handy when troubleshooting circuits. This one indicates a positive voltage with both a tone and a glowing LED. It is powered by the circuit being tested, so it needs no onboard power supply. The circuit uses CMOS 4011 quad gate. Gates 1 and 2 form an audio oscillator wit...

By: JamecoElectronics



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from Instructables: exploring - technology - robots http://ift.tt/1AxSzPb

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