EMULATE IR SENSOR

Other Hardware Sensors
1

Hi
I have an IR extender . I also got an IR sender that I have hooked up to my arduino, and taped to the receiver of the extender. This is working fine, however it would be more elegant to get the arduino to talk to the extender directly. So my idea is to get a male 3.5mm stereo jack and solder this to the arduino.

So my question is how can I find the pinout of the IR extender, I guess one is GND , one is signal and the third is vcc. Does it uses VCC at all or can I leave that wire out? Is it 5v compatible, or how can I find this out, do I need to add zner diode to protect my arduino? The extender uses 5v usb power supply.

There is no need to change anything in the code right? The pulse pin that I today use will then be connect to the signal pin on the IR receiver. Or am I missing something here?

2

Your Arduino IR sender would be an IR LED. Only Gnd and output from Arduino.

The extender receiver is probably an IR phototransistor that simply feeds an amplifier that drives IR LEDs as outputs. There would be no processing or decoding.

I would guess that the phototransistor would have two leads, Gnd and signal out. You would need to match the voltage out from your Arduino to that expected by the extender. This may entail opening the extender and doing some measurements with a CRO.

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