Hi, I am using a 5-V 2-coil bistable latching relay (the RT424F05) with a ATmega328P (at 2.5-5.5 volts) chip to switch 12-V power on and off once an hour. I think that between the chip and the relay I need to have a transistor and a diode, but I am having trouble figuring out the specifications required for those, and where to put them in the circuit. Can someone help with this? If more information is needed please let me know. Thank you!