Robin wrote:
On 26/02/2021 08:40, Ian Jackson wrote:

snip

One way of finding out if an RC is actually transmitting a signal is
to hold it close to a radio with a ferrite rod aerial, and tuned to a
quiet spot on the long wave. If the RC is transmitting, you will hear
a 'burpity-burp' noise when you press the a button.

How does that detect a failure of an infrared transmitter?


A webcam or a smartphone cam, can see the 940nm
light from the remote.

Here, I shot webcam video, so I'd catch it blipping,
then cropped down to just the remote front portion.

https://i.postimg.cc/65P9p8nc/infrared.gif

Paul