Sorry, I meant an infrared LED receiver or photodiode
I'm just trying to establish a wireless infrared channel for data transmission.
So I’m using a transistor as an LED driver to turn on an off the infrared LED emitter, I know the LED emitter is flashing (I just know) but I don’t think the infrared photodiode (2 pins) is receiving anything, I connected one pin (longest of the 2 pins) to a 5V and the other pin to a transimpedence amplifier (convert current to voltage and amplify it), is this correct? Should there be any other circuit between the transimpedence amplifier and the photodiode?
And yes the infrared emitter and photodiode have the same wavelength 860nm.
Also I have looked at a few LED drivers on the net and some LED driver circuitry is so big y do we they need such big LED drivers just to deliver a constant current through the LED emitter?...Isn't a BJT or MOSFET and maybe some resisters enough to drive an LED?
Where can I find an easy tutorial that can teach how to choose and program a microcontroller to give an FSK output and be able to reduce duty cycle if desired.
Thanks