High-power battery-operated flasher


Posted on Jun 17, 2012

This flasher operates from a 12-volt car or boat battery. It offers 36 to 40-watts output, variable flash rate (up to 60 flashes per minute), independent control of both on and off cycles and photoelectric night and day control that turns the flasher on at night and shuts it off during the day for automatic operation. SCR1 and SCR2 form a basic dc flip-flop. The lamp load is the cathode leg of one SCR so that the other side of the load may be at ground (negative) potential (required in some applications).


High-power battery-operated flasher
Click here to download the full size of the above Circuit.

The flip-flop timing is controlled by a conventional UJT oscillator arrangement (Ql, Rl, C3, etc.). Potentiometer R2 and diode CR1 provide on/off timing independence. Photoconductor PCI locks out the UJT firing circuit during the daylight hours.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

2500W Phase Control with TLE3103
1KHZ Sine Wave Generator Circuit
24 Second Countdown Timer Circuit
USB Printer Share Switch Circuit Project
Traffic Light Control Circuit
REMOTE CONTROL ANALYZER
Brushless DC motor control circuit



Top