Hi there,
I have set up some LED strip lights connected to a transformer, and I have a motion detector which switches the transformer on at the mains when someone enters the room. After a time delay of no motion being detected, the transformer switches off at the wall and so do the LEDs. Works great! Except for the fact that on turning off, the LEDs produce an epilepcy-inducing flickering for a few seconds before turning off. Guessing that the transformer has some residual charge?
Set-up
Here is more detail about the set-up:
The way I'm achieving this is as follows:
Here is a diagram of my set-up to hopefully make things clearer!
(1) Someone moves about in the range of the PIR motion detector (2) The motion detector sends a signal to the plug sockets (3) Both plug sockets (and hence both transformers) switch on, and so do the LED strip lights. This works nicely. The problem is that after a few minutes of no motion, the PIR is set to turn the plug sockets off. When the sockets turn off, the transformers turn off and the LEDs flicker rapidly before turning off.
I don't know if the transformers are faulty or whether there is a way of curing this flickering whilst still being able to switch the transformers on and off at the wall. I've wondered whether it's possible to put something at the transformer outputs, in between the transformer and the LED strip lights, so that instead of flashing they fade off or turn off in a non-flickery way.
Technical specs
The transformer I'm using is 150W for powering 12V LED lighting. All the specs are given here:
http://www.ledhut.co.uk/150-watt-led-transformer-driver.html
The strip lights specs are on this page:
http://www.ledhut.co.uk/led-strip-l...er-warm-white-best-price-on-the-internet.html
I have 5m of strip lights per transformer output, so with 2 transformers and 4 outputs I have 20m. That equates to 288W in total (72W per output).
Tests done
Any help to remove the flickering using this setup would be much appreciated!
Many thanks!
I have set up some LED strip lights connected to a transformer, and I have a motion detector which switches the transformer on at the mains when someone enters the room. After a time delay of no motion being detected, the transformer switches off at the wall and so do the LEDs. Works great! Except for the fact that on turning off, the LEDs produce an epilepcy-inducing flickering for a few seconds before turning off. Guessing that the transformer has some residual charge?
Set-up
Here is more detail about the set-up:
- I have two separate transformers, each with two output wires
- I have one motion sensor that controls both transformers and therefore all the strip lights
- All LED strip lights turn on when motion is detected and they turn off (or rather produce epileptic inducing flashes before switching off) 5 minutes after no motion is detected
The way I'm achieving this is as follows:
- I have the mains side of each transformer plugged into a Siemens Remote Control dimmable socket (see http://www.diy.com/nav/fix/electric...rol-Dimmable-Socket-Kit-2-Pack-Black-11827535).
- I also have a wall mounter PIR (see http://www.diy.com/nav/fix/electrical/room-control/Wall-Mounted-PIR-11937504) which activates the sockets when motion is detected.
Here is a diagram of my set-up to hopefully make things clearer!
(1) Someone moves about in the range of the PIR motion detector (2) The motion detector sends a signal to the plug sockets (3) Both plug sockets (and hence both transformers) switch on, and so do the LED strip lights. This works nicely. The problem is that after a few minutes of no motion, the PIR is set to turn the plug sockets off. When the sockets turn off, the transformers turn off and the LEDs flicker rapidly before turning off.
I don't know if the transformers are faulty or whether there is a way of curing this flickering whilst still being able to switch the transformers on and off at the wall. I've wondered whether it's possible to put something at the transformer outputs, in between the transformer and the LED strip lights, so that instead of flashing they fade off or turn off in a non-flickery way.
Technical specs
The transformer I'm using is 150W for powering 12V LED lighting. All the specs are given here:
http://www.ledhut.co.uk/150-watt-led-transformer-driver.html
The strip lights specs are on this page:
http://www.ledhut.co.uk/led-strip-l...er-warm-white-best-price-on-the-internet.html
I have 5m of strip lights per transformer output, so with 2 transformers and 4 outputs I have 20m. That equates to 288W in total (72W per output).
Tests done
- The flickering happens whether I have 20m of strip lights or 1m.
- The flickering happens without the PIR controller as well (i.e. if I plug the transformer directly into the wall and switch off manually, the flickering still happens).
Any help to remove the flickering using this setup would be much appreciated!
Many thanks!