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Hello everyone. I have a question regarding a part of a receiver sensor for an Arduino-based Laser Tag game I'm currently working on.
As you can see from the picture, when some signal light shines over the photodiodes (the laser gun light or IR light), such intermittent signal is repeated at the IR LED at the bottom; this allows the original signal to be repeated elsewhere. I initially tested it for the purpose of extending the range of an IR TV remote, and it worked quite well.
Since environmental background light may also shine over the photodiodes, this makes the IR LED a little bright, so I tried to eliminate this continuous signal by inserting a capacitor on the transistor base, with no success (the IR LED didn't shine anymore). I also tried to create a high-pass filter with an RC series after the emitter and taking the signal for the IR LED at the resistor, but this case didn't work too. Is there anyway to make the IR LED shine only when the 38KHz signal from the TV remote reaches the photodiodes and make it dim otherwise?
Thanks in advance.
As you can see from the picture, when some signal light shines over the photodiodes (the laser gun light or IR light), such intermittent signal is repeated at the IR LED at the bottom; this allows the original signal to be repeated elsewhere. I initially tested it for the purpose of extending the range of an IR TV remote, and it worked quite well.
Since environmental background light may also shine over the photodiodes, this makes the IR LED a little bright, so I tried to eliminate this continuous signal by inserting a capacitor on the transistor base, with no success (the IR LED didn't shine anymore). I also tried to create a high-pass filter with an RC series after the emitter and taking the signal for the IR LED at the resistor, but this case didn't work too. Is there anyway to make the IR LED shine only when the 38KHz signal from the TV remote reaches the photodiodes and make it dim otherwise?
Thanks in advance.
