Power-line frequency meter


Posted on Sep 17, 2012

The meter will indicate the frequency from a power generator. Incoming sine waves are converted to square waves by the 100K resistor and the 6,8 V zener. The square wave is differentiated by the capacitor and the current is averaged by the diodes. The average current is almost exactly proportional to the frequency and can be read directly on a 100 mA meter


Power-line frequency meter
Click here to download the full size of the above Circuit.

To calibrate, hook the circuit up to a 60 Hz poweraline and adjust the 5 K pot to read 60 mA.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Voltage-to-requency-converter
Fet-voltmeter
Audio/Video to UHF TV Signal Converter (Modulator) circuit diagram
high performance sawtooth generator
CM2 Practical
Detector switch circuits
Guitar To MIDI Using The LogoChip V2
GE/MACOM MASTR-III VHF Station
Cordless telephone voice processing circuit diagram



Top