Used to test TV and VCR remote controls
The circuit can be powered from a small 9-12 volt DC, 250 mA or greater wall transformer. It may also need an additional 1000 uF filter capacitor across the DC output if the wall transformer does not have a built in capacitor. For use with a 9 volt battery, the incandescent lamps can be replaced with a regular LED and 680 ohm resistor and the output transistors can be replaced with small signal transistors (2N3904 or 2N3906). The total current drain will be about 25 mA with the LED lit, and 15 mA standby when the LED is off.
Source:http://ourworld.compuserve.com/homepages/Bill_Bowden/page13.htm#ir.gif
Thank you.
Related Links
IR-remote-checker
IR remote control Tester
IR Remote Control
Light meter circuit
Infrared Transmitters by LM3909
Interface Circuits by IC LM324
Infrared Transmitter by IC LM324
Infra Red Switch control by normal remote
This entry was posted on Tuesday, October 2nd, 2007 at 4:59 pm and is filed under Lighting, meter.
