Posted on Jul 13, 2012

In this configuration, the display reads hertz directly. With pin 11 of the ICM7027 A connected to V00, the gating time will be 0.1 second; this will display tens of hertz as the least significant digit.

Click here to download the full size of the above Circuit.

For shorter gating times, an ICM7207 can be used with a 6.5536-MHz crystal, giving a 0.01 second gating with pin 11 connected to V00, and a 0.1 second gating with pin 11 open.

Leave Comment

characters left:

New Circuits



Popular Circuits

Touch Switch with 555
Baby Monitor Circuit
Car Boot Light Warning
interafce 16x2 lcd with avr
safe and security system
Simple RS232 Serial Interface Circuit
80M CW QRP rig
50hz Calibration aid for Multimeters
Phone camera flash control circuit
IC OCL power amplifier circuit