Re: IR detector system, biasing of photo diode

On 29-10-2024 20:59, Liz Tuddenham wrote:

Klaus Vestergaard Kragelund <klauskvik@hotmail.com> wrote:
 

Hi
>
I am working on an IR detector that will guide a robot into a docking
station.

 It sounds as though the problem could be solved easily and reliably with
a VLF magnetic field, rather than light.  Something along the lines of
the Lorenz blind landing beacon.  By using dot-dash modulation, the
receiver would know which side of the centre line it was on.
 The only problem would be convincing your client that it wasn't radio -
but that sounds like a much easier problem than all the solutions so far
suggested.
 

I did look into that, but did not go deeper.
The Lorenz beacon was very ingenious.
The solution with a rectangular loop in the base of the docking station worked well, but the client doesn't want that.
Maybe it's time to convince him to look at other solutions again :-)