Any Electrical Engineers? Need help on this adding LEDS.

907 Views 7 Replies 4 Participants Last post by >moto<, Feb 16, 2011

NewShockerGuy

Discussion Starter · Feb 14, 2011 (Edited)

I'm not a dummie when it comes to soldering or things like that... this however is throwing me for a loop.

I have a defi control unit II.. they only put in 3 leds and so the light spread isn't great... there are two more slots for leds.

I have a SPARE board so I de-soldered the smd leds off and now have 3 extra sitting here... I tested with a normal LED on the spot where it would normally be soldered on and it's not lighting up... reversed polarity and still nothing.. .which leads me to believe that there has to be a bridge made somewhere...

I have the following pics.

LED 2, LED3, LED6 have the smd leds there and those work... All I want to do is add LED4 and LED5...

I know this might be asking a lot but by looking at this pic anyone know what to bridge?

Back of board.

thanks,
-Nigel

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>moto<

· #2 · Feb 15, 2011

Okay, I'm not an electrical engineer so take my opinion as total rubbish and don't do anything I say.

If it was me, with power to the board I would physically bridge the LED's by holding a bit of solder onto the terminals to see if it works.

If it does then you can solder into place and hardwire the connections as opposed to using the PCB tracks which are hard to see in the pic.

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NewShockerGuy

Discussion Starter · #3 · Feb 15, 2011

>moto< said:
Okay, I'm not an electrical engineer so take my opinion as total rubbish and don't do anything I say.

If it was me, with power to the board I would physically bridge the LED's by holding a bit of solder onto the terminals to see if it works.

If it does then you can solder into place and hardwire the connections as opposed to using the PCB tracks which are hard to see in the pic.

I touched the LED feet to the solder joints and they did not light up so that's what makes me feel like they need to be bridged together somewhere...

-Nigel

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>moto<

· #4 · Feb 16, 2011 (Edited)

The solder joints on the PCB board or the other LED?

Do you just want to have 8 LED's working instead of 6? If so, assuming there is sufficient power to do so I'm suggesting to wire them in series. Bridging is more of a 'parallel' set-up.

Try running solder, or wire, from the terminal of one of the existing LED's to one of the additional ones to see if it works (illuminates both). If the electrical supply is man enough to run 8 LED's (as opposed to the existing 6) and you want them all to illuminate at the same time this will work.

To clarify, I wouldn't wire all 8 in series (though I think that's how the existing 6 are set-up). Just the 2 additional ones. Wire each additional LED in series with one of the ones next to it.

Disclaimer: I am heavily retarded and just make this stuff up based on no personal experience or facts of any kind. Also when I saw your first picture of that PCB I thought it was a photograph of New York taken from a helicopter, but hey, that's just how I roll.

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NewShockerGuy

Discussion Starter · #5 · Feb 16, 2011

Finally figured it out. I followed the traces via a the back and top and found that the two leds were tied together as they actually complete the circuit.. so as I soldered one led on and it didn't work it's because it neede the OTHER led to be soldered in to compelte it! lol

Now I got all the leds lit up! Nice and bright now w00t w00t!!

-Nigel

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Smoke

· #6 · Feb 16, 2011

>moto< said:
Also when I saw your first picture of that PCB I thought it was a photograph of New York taken from a helicopter, but hey, that's just how I roll.

:rofl2:

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sassafras

· #7 · Feb 16, 2011

>moto< said:
Disclaimer: I am heavily retarded and just make this stuff up based on no personal experience or facts of any kind. Also when I saw your first picture of that PCB I thought it was a photograph of New York taken from a helicopter, but hey, that's just how I roll.

Dude, if that's the case then maybe you need to roll on into your optometrist.

sassafras

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>moto<

· #8 · Feb 16, 2011

sassafras said:
Dude, if that's the case then maybe you need to roll on into your optometrist.

sassafras

Maybe you can come to the doctor with me and see if they can give you a sense of humor re-adjustment whilst you're there

Glad to hear you got it sorted NewShockerGuy

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