24 Second Shot Clock Circuit


Posted on Feb 6, 2014

To start in 24 seconds; 24s LOAD SW and Reset SW should be push simultaneously. If not, the count will start in 99. Pulse input can be connected to 555 astable multivibrator but must be calibrated for real time clock. The PAUSE SW must have a Switch Debouncer so that the counter will count normal when counting is paused and then turn-on. When the


24 Second Shot Clock Circuit
Click here to download the full size of the above Circuit.

count reach 00, the NOR gate will have an output of logic1 that will turn on the two transistor. The buzzer will rung and light will turn on. The two transistors are continuously turn-on not until LOAD SW and Reset SW is push. All have a +5v power supply.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Write-amplifier
Add-On Pulse Generator Circuit
220V LED Flasher
Electronic Keypad Combination Lock
motor timer
555 tracking transmitter
Rolling Shutter Motor Control
Fine Control Super Bright LED Pulser
TDA4866 test circuit diagram
Thyristor AC torque motor speed control circuit 2



Top