led workbench lighting


Posted on Feb 7, 2014

A very useful workbench lighting unit for electronics hobbyists. The portable inspection lamp circuit consists of an on-board voltage regulator and a high-bright 5mm white LED. Any 9 to 18 volt dc rated ac mains adaptor, capable to source about 100 mA of output current can be used to power this portable inspection lamp. After construction


led workbench lighting
Click here to download the full size of the above Circuit.

the led workbench light circuit should be enclosed in a suitable plastic bottle cap as illustrated here. The miniature lens shown is an optional component. In the prototype, plastic made lens lifted from a discarded torch was used! The adjustable 3-pin voltage regulator IC1 (LM317L) in TO-92 pack, is here tuned to supply an output of near 4. 5 volt dc. This supply is directly fed to the white LED (D2) through the current limiter resistor R3 (51 Ohm). Diode D1 (1N4001) works as an input polarity protection guard and two small electrolytic capacitors (C1 and C2) connected at the input and output pins of IC1 improves the overall stability of the regulator circuit. Use a standard RCA or EP socket as the input terminal J1.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Soft Start for PSU
Interfacing seven segment to microcontroller
Electronic I CHING Detector
Simple-ham-band-receiver
1998 tracker: 1.6 multifuel port injection replaced plugs cap rotor
The 555 Monostable
Electronic mousetrap power-saving circuit
The MAX4104 4105 4304 4305 as the driving capacitive loads
With a CD4013 Touch delay saving lamp production



Top