Rugged lamp driver

Posted on Dec 8, 2012

This circuit is capable of driving filament lamps of nominal rating 200 mA at 60 V dc from a CMOS logic signal. The lamp or load is connected in series with the Darlington transistor TR1 and emitter resistor R5. The Zener diode ZD1 establishes a soft reference voltage on the collector of the optical coupler IC2.

Rugged lamp driver
Click here to download the full size of the above Circuit.

When the logic control signal from the processor switches the optocoupler on via IC1, base drive is applied to TR1 and the lamp is switched on.

Leave Comment

characters left:

New Circuits



Popular Circuits

Heart rate monitor
Mixer Diplexer
Over-Temperature Switch
Schematic Diagram LM1877 Audio power amplifier circuit
Tesla Coils Wiring
Make this Astable Multivibrator Blinker Circuit Using NAND Gates
propeller receiver
tachometer circuit diagram
Serial LCD Library