Connecting LED panel to relay module

Projects General Guidance
1

Hi, thanks for reading.

I have some of these: http://www.amazon.com/NEEWER®-Light-Festoon-Dome-White/dp/B005J3BPCK#productDetails

I and I want to connect them to one of these: http://www.sainsmart.com/16-channel-12v-relay-module-for-pic-arm-avr-dsp-arduino-msp430-ttl-logic.html

I am using one of these to power the board: http://thumbs3.ebaystatic.com/d/l225/m/mgx2BrqOK16ooQG_lcVAX7w.jpg

Aside, of course, from the Arduino Uno.

I have managed to make the relays switch (I can hear the "click"), but I can't get the LEDs to light.

I really appreciate any help anyone can offer.

Thanks!

2

Hi, can you post a copy of your circuit diagram, CAD or even a scan or photographed pic of a hand drawn circuit.
This will help greatly to help solve your problem.
Tom... :slight_smile:

3

I have the same board and have (so far) had no problems with it. Try the following:

1 Check the LED's to make sure you don't have them backwards. LED's are really just diodes, so current only flows one way.

2 these boards are backwards from the logic you might think. A low actually activates the relay, high hopes them open. Check that you are sending the right kind of signal.

3 If all else fails, pull out your trusty multimeter and check which line have the connection o. Them. I did this the first time with mine too. Just use the ohms setting ( Don't forget to disconnect all three wires from the relay you are testing, it could be a shocking experience if you don't).

Oh, and by the way, I noticed this board gives power to the Arduino, About 4.96 volts to be precise. Does anyone have experience with having the USB connected to a PC while using this board? I don't want to short out something by giving feedback to the lc via the USB. Right nkw i have a diode on ny ground to keep it from feedkng power back, but i woild like thoughts from others...