On 24/11/2019 11:01, Woody wrote:

That seems to completely avoid the question of how the power jumps
over to the gate ...

I misunderstood the question. Having said that, for safety reasons the
gate should have a bump stop on the leading edge so that if someone or
thing gets in the way the gate either stops or withdraws. Such gates are
heavy so need a fairly powerful motor (even if geared) to shift them
ergo if it didn't stop it could do damage or serious injury.
If the gate has such sensing then by definition it must already have
some form of connection to it so that the bump sensor gets its message
back to the controller, and if that connection exists then it shouldn't
be difficult to get power for the LEDs as well surely?


The safety sensors on the gate are connected to 433MHz transmitters that
emit a brief signal when activated. The signal is picked up by a
receiver that communicates with the gate motor's control panel. In
addition there are fixed IR beams across the drive entrance.

Bill