dcrelay
1- DC12V Coil Power Relay 10A DPDT LY2NJ HH62P HHC68A-2Z With Socket Base
2- Amico 12V DC Coil Power Relay DPDT LY2NJ HH62P-L JQX-13F 10A With PTF08A Socket Base
First assumption is that they are the same thing, but before I jumped to a conclusion I wanted to get some clarification.
If these are different what makes them different?
Thanks in advance!
This will drive a relay from a micro-controller pin: -
The relays you have described are fine and putting a contact in live and neutral is fine too. Just make sure you select your final one to switch 10A and check to see it is rated for the voltage and has a good gap coil to contacts (or is specified as being suitably safe).
The transistor in the circuit has to be able to supply the relay coil current so it may need to be rated at 200mA depending which relay you choose. Voltage rating 20V or above. If you are using a "hungry" coil and it needs more than 100mA you might want to reduce the 10k to a 2k2 to make sure the transistor turns on properly.
If the relay doesn't have an in-built diode protection circuit then you'll need to add a diode to the circuit across the relay. It's normally not conducting with the anode at the collector of the transistor. 1N400x type will do.
Are the transistor emitter and relay power supply ground connected to the Pi ground? The transistor won't switch unless its emitter is connected to the Pi ground.
Best Answer
The picture there doesn't show it very clearly at all, but the "-L" suffix specifies that there should be an LED indicator on the coil contacts to indicate relay activation.