Only 2 of the 4 LEDs on my circuit turn on. Please help!!!

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crohlffff
 
Posts: 2
Joined: Wed Apr 23, 2014 6:30 pm

Only 2 of the 4 LEDs on my circuit turn on. Please help!!!

Post by crohlffff »

I can only get LED1 and LED3 to turn on. The rest of my circuit is fully functional and those two LEDs can turn off TV's but I would like to get all four working. I have tried fixing the solders, changing batteries, and adjusting everything.
Attachments
Front
Front
front.PNG (411.26 KiB) Viewed 1700 times
back
back
backsolder.PNG (288.78 KiB) Viewed 1700 times
led
led
LEDs.PNG (88.63 KiB) Viewed 1700 times

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adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: Only 2 of the 4 LEDs on my circuit turn on. Please help

Post by adafruit_support_bill »

The soldering looks OK. Double-check the LED orientation. A reversed LED would not light.

Re: that last photo - powering it up with all those un-trimmed leads is asking for a short circuit. That could have damaged some of the output transistors.

crohlffff
 
Posts: 2
Joined: Wed Apr 23, 2014 6:30 pm

Re: Only 2 of the 4 LEDs on my circuit turn on. Please help

Post by crohlffff »

Is it possible to unsolder the non working LEDs and their transistors and put new ones in and resolder them? I have extra pieces at the parts shop at uni. Or would it not be worth it?

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adafruit_support_bill
 
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Re: Only 2 of the 4 LEDs on my circuit turn on. Please help

Post by adafruit_support_bill »

That is possible. If you have some solder wick and/or a solder-sucker handy, that will make the job easier.

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