"Dave Plowman (News)" wrote in message
...
In article ,
Geoff Lane wrote:
I've posted a couple of questions recently on GU5.3 12v LED lamps.

Another thing I cannot quite get to grips with is the power supply.

In the screwfix catalogue it shows the following;

http://tinyurl.com/albmpj Voltage driver
http://tinyurl.com/atfp7m Current controller

What would be the reason for using either one or the other of these PSUs.

I'd say it depends on the connection of the lamps - series or parallel.

It's normal to series LEDs and use a constant current driver. Assuming the
LEDs are well matched.

If they are connected in parallel and each has its own current limiting
resistor etc then constant voltage would be the thing.

--
*If at first you don't succeed, destroy all evidence that you tried *

Dave Plowman London SW
To e-mail, change noise into sound.


Agreed

Arfa