Does the IR LED in this circuit light just like the IR LED in a TV remote control?

I have tested it but the IR leds does not light when supplied with 5 volts. It looks like it lights when it is supplied with 5 volts as circuit provides. Reply With Quote View Profile 01-03-09 22:38 #2 banjo Advanced Member level 2 Join Date Dec 2005 Posts 644 Helped 120 / 120 Points 6,329 Level 18 lm358+ir led You show two IR LEDs in two different circuits.

Which one are you asking about? The receiver requires that you adjust the pot, R8, until this circuit is in the active region. Place a TV remove very close to D1 and then hold down a button that transmits continually, like the Volume UP button.

Now, adjust R8 through its range watching for D3 to flash or flicker. If D3 is either always ON or always OFF, measure the voltages of pins 5,6 and 7 of the opamp U1 and report these to the board. Reply With Quote View Profile 01-03-09 23:21 #3 diegobb Member level 4 Achievements: Join Date Jun 2003 ... more.

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