On 24/11/2019 09:47, Andy Burns wrote:
Bill Wright wrote:

I want to put some LED lights on my sliding gate. I wondered if I
could power them inductively, with a power 'transmitter' fixed to the
gatepost and a power 'receiver' on the gate, positioned so when the
gate's shut they are close together and the LEDs come on. The power
requirement of the lights is 24W at 12VDC. The positional accuracy of
the gate is good.

You can buy 'commodity' induction coils in the 5W to 10W range that are
intended for phone charging, rather than running the LEDs on 'live'
power, maybe you could fit a battery on the back of the gate, and let it
charge 24x7, if the gate spends a significant part of its life open,
then have two receivers, so that its powered when fully open and when
fully closed

e.g. a 5V 1A transmitter/receiver
https://www.seeedstudio.com/Wireless-Charging-Module-5V-1A-p-1912.html

a bit more googling ought to find 10W coils

This seems very promising, thank you.

Bill