I recently picked up this relay shield-
http://www.ebay.com/itm/221342495715?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649The issue I'm having is:
Case A: I can get the input LEDs to operate appropriately (light constantly when I push a momentary button), but they won't activate the relay.
OR
Case B, I can get the relays to engage, but not disengage, and the input LEDs don't go fully dark.
Case A:
Here's a description of the connections:
Arduino powered from 12V External
VCC on Shield is connected to 5V Arduino
JD-VCC on Shield connected to V-In on Arduino (12-VDC)
Ground on Shield to Power Supply side Ground on Arduino
Input1 on Shield to Pin 12 on Arduino
Connected this way - the Input LED on the Shield cycles with the button push, but no click or continuity from the Relay
Case B:
VCC on Shield is connected to V-In on Arduino (12-VDC)
JD-VCC on Shield is jumpered to VCC
This way, the relay is energized immediately, and pushing the button makes the led on the shield dimmer, but doesn't turn off, and relay remains energized.
Is there something else I should be doing? The code is obviously working as it should, but I'm no EE, the lack of a biasing resistor on my momentary button threw me off for the longest time.
Any help would be greatly appreciated!