I have a 555 timer circuit attached to an IR emitter as shown in the attached diagram. I have also built the IR sensor as seen in the other diagram. The only difference is, I used a Radio Shack 276-640 IR sensor.
When I check the frequency across the IR emitter I see 38.3 kHz which should work with the detector. However, the detector circuit always stays high (+5V). I can point my remote control at the sensor, and when i push a button, the circuit goes low (0V). I assume this sensor from radio shack is reverse logic therefore.
For some reason I cannot get the sensor to work with my emitter. How sensitive is this dectector. Do I have to be right on at 38kHz. I seem to only be able to do slightly above or slightly below, which both don't work. I also tried different distances (up to 6 inches away) with no luck.
Any suggestions? Is there something here I am not seeing?
When I check the frequency across the IR emitter I see 38.3 kHz which should work with the detector. However, the detector circuit always stays high (+5V). I can point my remote control at the sensor, and when i push a button, the circuit goes low (0V). I assume this sensor from radio shack is reverse logic therefore.
For some reason I cannot get the sensor to work with my emitter. How sensitive is this dectector. Do I have to be right on at 38kHz. I seem to only be able to do slightly above or slightly below, which both don't work. I also tried different distances (up to 6 inches away) with no luck.
Any suggestions? Is there something here I am not seeing?
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