standard T-1 3/4 IR LED with 220 ohm resistor connected to 5V power source
IR Phototransistor ( the QRB1134 ) in this circuit - http://www.superdroidrobots.com/product_info/qrb1134.htm
- with a voltmeter monitoring the signal
QRB1134 - http://www.superdroidrobots.com/product_info/QRB113x.pdf
Neither the LED nor the phototransistor use a modulate IR signal. They are just ON.GOAL:
I want to be able to detect IR light that is emitted by an IR LED with a IR Phototransistor. I don't want to send any data, just need to be able to detect the light. I want to be able to detect the IR Light from 6 feet away.TEST:
I am trying to see how far away I can move the phototransistor from the IR LED and still get a signal. I point the IR LED at the IR Phototransistor , use a cell phone camera to verify that the IR light is hitting the phototransistor, and then see if I get any signal at all from the phototransistor.PROBLEM:
I do get a signal when they are 1 foot apart, but passed 1 foot I do not get any signal. What can I do to increase this range?
I know further range is possible because TV remotes have ranges farther than 6 feet!