problem with the receiver

[Gregor G. <gre...@gm...>]

Hi. I have a "small" problem with the serial receiver. The problem is
that it only gets signals from max. 2cm away. First I've soldered it
together and when that didn't work I tried putting it together on a
breadboard with all components new - that didn't work either. The
receiver I'm using is the SFH 5110-36, I've tried four of them with
three remotes and no improvement. The reason I didn't try other
receivers is that I can't get any of them.

Voltage on the IN-GND pins is 4,94V, on the OUT-GND the voltage is
4,45V when idle and drops to 3,80-4,15V when a button is pressed, the
voltage stays the same no matter the distance of the remote.


I would appreciate any advice you can give me.

Thanks.