Reflex Timer Circuit


Posted on Aug 8, 2012

This timer circuit uses a 555 IC timer and three 74LS193 counters to drive an LED display. SI is activated by one person, who turns on piezo buzzer BZ1 via Ql and also starts the clock; SI is activated by the other person being timed.


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

This shuts off the timer, and the number of LEDs lit indicate, in binary form, the elapsed time.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Guitar Amplifier
Sensitive Electrostatic detector
Capacitor discharge ignition system ( PIC 16F615 )
Precise audio clipper
Sine- And Square-Wave Ttl Oscillator
Reverse engineering the Elco heating protocol
200 watts amplifier using tda2030
Decibels Meter Circuit Using LM324
intercom
ECE 3434 Electronic Circuits II
UV/IR/Visible LED Flashlight with Intensity Control



Top