what are pin A1 and A2? GND, VCC, INPUT?

Thanks for reaching out! Let me confirm this info with our engineers and we will get back to you shortly for more updates.

Hello!

I've got some information from our engineering team about the relay you're asking about. The pins labeled A1 and A2 on the relay are for the coil connection. This particular relay operates with a 5.0V DC input, which you should apply across these coil pins.

You don't need to worry about which coil pin gets the positive voltage and which one connects to the ground; either pin can serve either function.

Additionally, the relay has three other pins which are labeled as Common, Normally Open (NO), and Normally Closed (NC), and here's how they work:

- When the relay is off (not activated), the Common pin is connected to the Normally Closed (NC) pin.

- When the relay is on (activated), the Common pin is connected to the Normally Open (NO) pin.

This setup allows you to control how and when your circuit is completed based on whether the relay is activated or not.

Let me know if you need more details or any other assistance!

Regards,
Ron