Inexpensive frequency counter-tachometer

Posted on Aug 13, 2012

This circuit uses the low power ICM7555 (CMOS 555) to generate the gating, STORE and RESET signals. To provide the gating signal, the timer is configured as an astable multivibrator. The system is calibrated by using a 5 M potentiometer for Ra as a coarse control and a 1 jk potentiometer for Rb as a fine control

Inexpensive frequency counter-tachometer
Click here to download the full size of the above Circuit.

CD40106B"s are used as a monostable multivibrator and reset time delay.

Leave Comment

characters left:

New Circuits



Popular Circuits

VHF - UHF band reciever
All in one Remote using Arduino
dc motor driver with h bridge ic l293d
astable mode of 555 timer
High Quality Intercom
Infrared Fire-Cracker Igniter circuit
AT89C2051/4051 Driving Dot LED
Voltage-controlled oscillator
A simple bedside lamp delay circuit