I'm building up a project to transmit data from one computer to another computer from a wireless media and I have to use LEDs for this purpose (As per the requirements of the project, so I can't use laser diodes). I'm thinking about using the USB to RS232 module, an Op-amp, a schmitt trigger and a SHARP IR sensor to send the light signals and a photo-transistor.
I'm going to do it like this:
1. Connect a serial monitor to the PC 2. Use RS232 module Tx pin to drive a switching transistor which is connected to the SHARP sensor's Vcc Pin 3. In the receiving circuit, get the light coming from the IR Sensor IR LED using the photo-diode and connect it to a schmitt trigger 4. Connect the schmitt trigger output to an Op-Amp 5. Connect the Op-Amp output to another RS232 module Rx pin and read data from a serial monitor
I'm just wondering if the above selection of items are the appropriate ones. The receiver has to be 1m away from the transmitter. So are there any other options I can use other than the SHARP IR sensor?