IR Receiver

First you cannot really count the number of pulses for most of the IR Tx because it will emit pulses as long as you continue pressing any button on your remote control. Second, maybe you have a problem on filtering. try to connect the IR rcvr to an oscilloscope and observe any noise. flourescent lamps emits IR too.

As JohnDG noted with TSOP1738 you can only count "bursts" of modulated 38kHz IR. The device is technically an IR pre-amp not just a receiver. On the spec sheet for the device there is an outline of suitable data formats. Also remember the device can be "blinded" by strong infrared signals that aren't your intended one, namely incandescent light. Strong incandescent light, like maybe a 60W work light a foot or two away would effectively "blind" the receiver as there is more non-modulated infrared from the bulb then from your IR source. If you have an oscilloscope or even a multimeter you can experiment and see if your actually receiving anything. Put 5V to the VS and Gnd and then monitor the "Out" pin to ground, it will be 5V with no signal and drop down close to 0V when modulated IR is present. Good Luck!

Shawn

Hello Sir ,

When connected to Controller , Will the Pulses be scopable through Instr.? Observed Voltage Levels , Please . Freq. rate , you would have observed as well . May please be put into .