HM3105 Posted August 13, 2015 Share Posted August 13, 2015 Hello all, I'm wiring a new LED array up and out of the four LDD's I plugged into my Coralux 5up board it appears only one is working. The power supply is 24v, 5 AMP. One channel did turn on but the others won't. I took out each LDD and plugged each one into the channel that was working and none of them fired. In addition, if I plugged in another LDD to the 5up board the channel that was firing wouldn't fire either. So I'm perplexed what all this means. Any thoughts? Is there a way to actually test the LDD? Link to comment
Benny314 Posted August 13, 2015 Share Posted August 13, 2015 What are you trying to run, what LEDs? Are all the pins lining up with the headers on the board? It could be a bad board, but unlikely to be 4 or so bad LDDs. Link to comment
HM3105 Posted August 13, 2015 Author Share Posted August 13, 2015 What are you trying to run, what LEDs? Are all the pins lining up with the headers on the board? It could be a bad board, but unlikely to be 4 or so bad LDDs. My initial thought was the board was bad also, so I moved the working LDD to a different slot and sure enough it fired. royal blue, blue, neutral white, cyan and cool white all Rebel ES. There are 12 LEDs in total on two separate channels. The RB and Cyan are on the channel that fires. Link to comment
HM3105 Posted August 14, 2015 Author Share Posted August 14, 2015 Here are some pictures to see if this help.. I resoldered these twice and switched LDDs and still no luck.. power supply although not listed it is suppose to be 120w. Link to comment
evilc66 Posted August 14, 2015 Share Posted August 14, 2015 Do you not have a controller connected? The Coralux boards have a 10K pull down resistor on the pwm pin so that the output shuts off when the controller is shut down or is being reprogrammed (the pins on the micro controller typically float when programmed and would make each channel go to full output as a result). If there is one LDD that is working with no controller, then I'd say that one is actually faulty, as it's ignoring the pull down resistor on the pwm pin. Link to comment
HM3105 Posted August 14, 2015 Author Share Posted August 14, 2015 Do you not have a controller connected? The Coralux boards have a 10K pull down resistor on the pwm pin so that the output shuts off when the controller is shut down or is being reprogrammed (the pins on the micro controller typically float when programmed and would make each channel go to full output as a result). If there is one LDD that is working with no controller, then I'd say that one is actually faulty, as it's ignoring the pull down resistor on the pwm pin. Ah you know what that is correct I am running it without the controller right now because I was testing the LEDs.....such an idiot completely forgot about that failsafe... Link to comment
Reefkid88 Posted August 17, 2015 Share Posted August 17, 2015 You could very easily unsolder the resistors off the board. Which with still work when you connect a controller to it. Link to comment
gus6464 Posted August 17, 2015 Share Posted August 17, 2015 You could very easily unsolder the resistors off the board. Which with still work when you connect a controller to it. Yes and then if the controller dies then the LEDs proceed to fire at full blast. Not what you want... Link to comment
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