Constant-brightness-control


Posted on May 2, 2012

An automatic control maintains a lamp at a constant brightness over a wide range of supply voltages. This circuit utilizes the consistency of photodiode response to control the phase angle of power line voltage applied to the lamp and can vary the power between that available and `` 30% of available. This provides a candlepower range from 100% to less than 10% of nominal lamp output.


Constant-brightness-control
Click here to download the full size of the above Circuit.

The 100-J.tH choke, resistor, and capacitors form an ric filter network that is used to eliminate conducted RFI.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Packet Radio with AVR
Digital Sawtooth Generator
Transistor Checker Circuit
DC motor 12V speed controller circuit with explanation
ttl three state logic probe circuit
MOSFET + Relay to Control a Motor
ZX Interface 2
Vary the Volume of a Buzzer
simple key-scan IC
Sequence timer circuit diagram of 555 chips
Sound field effect transistor amplifier circuit
300W Valve RF Transmitter circuit



Top