What is the coil rating on the relay?
If its less than 150 ohm, it needs more current than the Arduino can supply.
Use an NPN transistor to sink current thru the coil to turn it on.
What is the coil rating on the relay?
If its less than 150 ohm, it needs more current than the Arduino can supply.
Use an NPN transistor to sink current thru the coil to turn it on.