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Receiver hardware for IR beam (red eye)?
12-07-2023, 07:11 PM
Post: #21
RE: Receiver hardware for IR beam (red eye)?
(12-07-2023 04:07 PM)Martin Hepperle Wrote:  There are plenty of IrDA Transceiver modules should probably work for this purpose.
One of these modules is what you find inside the HP C4103.

Thanks! I wonder if this one is good enough: https://www.vishay.com/docs/84672/tfbs4650.pdf

The one in the C4103 is rated for 4Mbps, but I think 115200bps is enough.
The data sheet says "For input pulse width 1.6 < tTXD < 23 μs: Optical output pulse duration: tTXD + 0.15μs". Given that one pulse of 32kHz is 15.26μs, this looks fast enough.

It can't send and receive at the same time, but this is not required.
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12-09-2023, 10:34 AM
Post: #22
RE: Receiver hardware for IR beam (red eye)?
(12-07-2023 07:11 PM)Tinue Wrote:  
(12-07-2023 04:07 PM)Martin Hepperle Wrote:  There are plenty of IrDA Transceiver modules should probably work for this purpose.
One of these modules is what you find inside the HP C4103.

Thanks! I wonder if this one is good enough: https://www.vishay.com/docs/84672/tfbs4650.pdf

The one in the C4103 is rated for 4Mbps, but I think 115200bps is enough.
The data sheet says "For input pulse width 1.6 < tTXD < 23 μs: Optical output pulse duration: tTXD + 0.15μs". Given that one pulse of 32kHz is 15.26μs, this looks fast enough.

It can't send and receive at the same time, but this is not required.
This module seems like a workable solution and includes an amplifier. Might be a bit of a challenge to solder wires to it, but with a steady hand this might really work

Regards, Meindert
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12-11-2023, 11:47 AM
Post: #23
RE: Receiver hardware for IR beam (red eye)?
These things are tiny...

   
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