Led Deck lighting issue

[alwaysbuilding123]

Hi all quick question i hope someone may have more knowledge than I do on, fitted some led deck lights, only 7 which is powered by a plug in transformer to 12v dc then to the controller then the lights and I have just noticed that after switching them off ( via remote control ) they stay on very dimly? I would have said a faulty individual led unit but it's all of them that stay on anyone have any idea what could be doing it

Cheers all

 

[Harry Bloomfield]

Hi all quick question i hope someone may have more knowledge than I do on, fitted some led deck lights, only 7 which is powered by a plug in transformer to 12v dc then to the controller then the lights and I have just noticed that after switching them off ( via remote control ) they stay on very dimly?

Do they still glow, with the transformer switched off?

Probably, the remote switch, is not completely switching off, that it passes current, enough to cause them still light dimly. Try adding one single, low wattage filament lamp, of the correct voltage to match the transformer voltage, across the circuit - then report back...

 

[alwaysbuilding123]

The only way to get them to go completely off is to unplug the transformer... thank you I will try whatvyou suggested and see then pop the results back on here

 

[alwaysbuilding123]

Ok couldn't find a suitable lamp to test but I have done a simple voltage test, the transformer appears to be working fine giving a steady 12.39v, when I connect the controller unit with it turned on 12v is coming through to the 4 pin connector but if I turn them off 1 of the 4 shows no voltage but 1 pin shows 3.4v and the other flicks between a mv reading and 1.8v constantly... am I on the right track in thinking the fault is with the controller letting the 3.4v and the flicking 1.8v through when it should be completely off

 

[Harry Bloomfield]

am I on the right track in thinking the fault is with the controller letting the 3.4v and the flicking 1.8v through when it should be completely off

If it were relay switched, it would be completely off, but it seems it is electronically switched, which might allow some leakage, but equally it could aslo be faulty. Worth contacting the seller, and explaining the problem, see if you can get a FOC second one, to test..

12.39v suggests an ordinary, old fashioned car bulb would be fine for the test, a 3w interior light bulb, tail light bulb, dash light or similar.

 

[Taylortwocities]

am I on the right track in thinking the fault is with the controller letting the 3.4v and the flicking 1.8v through when it should be completely off

I guess you are using a digital volt meter. these are very high impedance and will pick up all sorts of stray induced voltages.
If i understand, you still see voltage when the power supply is switched off?
Try this. remove the connection from the output of the power supply. Test the power supply output with the mains voltage off. I bet it is zero. Before you connect the lights up again, measure the voltages at each, I expect you will again find your spurious voltage. This means the problem is induced voltages from adjacent cable(s).
This can be solved by putting a "snubber" across one of the lamps, or the PSU output.
Like this https://thepihut.com/products/shelly-rc-snubber or THIS

 

[alwaysbuilding123]

Yeah it is a digital voltmeter I used, ok I will look into that thank you for that