This frequency meter is suitable for sinusoidal wave and square wave input signals. Minimum input potential must be 25mV(rms). Measurement range can be determined from 10 Hz to 100 kHz by using the S1 switch. Each switch position part is calibrated by using 20 kOhm potentiometer. Total current consumption of the circuit is about 10mA. R1 and C1 values should be chosen depending on wheather microampermeter or milliampermeter is used.
Read more source:http://www.circuit-projects.com/frequency-meter-for-10-hz-to-100-khz-input-by-74121.html
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This entry was posted on Monday, May 26th, 2008 at 11:01 am and is filed under meter.
