Using Grove Latching Relay Module without Grove Base Shield -- Possible??

Projects General Guidance
1

I just bought some Grove 2-Coil Latching Relay modules. I don't have a Grove Base Shield, and would prefer to not use a Base Shield if it can be avoided. Instead, I would like to connect Relay module directly to pins on an Arduino Leonardo.

The relay module has a four pin plug on it which normally would plug into the Grove Base Shield. The pins are labelled SIG, NC, VCC, GND (see attached photo).

I assume that if I'm not using a Base Shield that I could connect the pins directly to an Arduino as follows:

VCC would connect to Arduino 5v power pin
GND would connect to Arduino ground pin
SIG would connect to Arduino digital out pin
NC would connect to Arduino digital out pin

Is there any electronic reason why the relay could not be used as above without a Base Shield?

Relay.png
Relay.png743×403 468 KB

2

NC would connect to Arduino digital out pin

NC means Not Connected. Why would you connect that to the Arduino?

Is there any electronic reason why the relay could not be used as above without a Base Shield?

Plain orneriness.

3

PaulS:
NC means Not Connected. Why would you connect that to the Arduino?

Not to throw the question back, but I too was wondering what the NC pin was for. Could it be to de-latch the relay?

4

Need to review the board schematic to see where the NC pin goes.
http://www.seeedstudio.com/wiki/File:Grove_-_2-Coil_Latching_Relay_Eagle_File.zip
The code examples certainly seem to only require a rising edge to connect COM to one pin, and a falling edge to connect COM to the other pin.

5

The schematic indicates that the NC pin is Not Connected to anything.

A somewhat unfortunate name, given that NC in relay parlance usually indicates Normally Closed.