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help with wiring relay board
PL1:
Found this user feedback for the 4-channel board by the same manufacturer, Keyes.
--- Quote --- Pros:
It's easy to use, when you know, where should be connected what. It comes without scheme, but connection is easy:
VCC + GND = +12V DC and GND
IN1 .. IN4 = your 5V outputs from microcontroller
COM = your GND from microcontroller
GND = the same as 12 V GND
Note: there is a jumper for connecting COM (=microcontroller GND) and GND (=12V source GND), to have the same potential. But this is not needed, when disconnected, the circuit of microcontroller and other 12V circuit are isolated (unless there is any other connection)...
Other pros: red LEDs showing state of relais (on/off), one LED is ON when 12V DC supply is present.
--- End quote ---
You can see the jumper in the lower left of this diagram. (the 12v board works the same as the 5v board)
Here's how to connect the pins: (from left to right)
Vcc = 12v from power supply molex
GND = ground from power supply molex
IN1 - IN8 = the control channels on the LEDwiz
COM = ground from LEDwiz
GND = not connected
--- Quote from: jaharr01 on August 27, 2014, 09:08:29 am ---I guess I could test it before I install it by hooking it all up manually switching the ground like an LED wiz does. Do I need diodes?
--- End quote ---
Yes, you can test it without the LEDwiz.
No, you shouldn't need snubber diodes -- pretty sure they are on the board.
Scott