A challenge for the...
 

MegaSack DRAW - This year's winner is user - rgwb
We will be in touch

[Closed] A challenge for the hive mind, anybody know anything about electronics...

3 Posts
3 Users
0 Reactions
66 Views
Posts: 4892
Full Member
Topic starter
 

We have a fancy bathroom mirror with LED backlights

Its got 16 LEDs group in groups of 4 running off mains transformed down 24dc.

Now some of the LEDs have gone so a row 4 doesn't work.

If I bridge the duff LED the 3 remain come back.

So I can solder in new ones I just have no idea how to work outr which ones I need.

They are white, have a small square base approx 3.5mm x 3.5mm with 4 pins and a dome top???

Help!


 
Posted : 25/11/2011 3:11 pm
Posts: 2
Free Member
 

Time to go to Maplins with it. Do you have one close by?

No markings whatsoever on the LED?


 
Posted : 25/11/2011 4:13 pm
Posts: 4892
Full Member
Topic starter
 

Nope; nada

Been to Maplins who were as much use chocolate teapot


 
Posted : 25/11/2011 4:31 pm
Posts: 598
Full Member
 

check for defective or dry joints first.

it is unlikely that the leds have gone


 
Posted : 25/11/2011 4:34 pm