I have a small solenoid (Jameco 149762 - PN SMT-1632S12A):
Specs:
12 volts DC
7 watts
21 ohms coil resistance
My power supply is:
12 VDC (From an old printer or something)
1.25 Amps
I'm thinking I need to add a 15 W, 20 Ohm resistor to protect the solenoid.
Am I on the right track here, or am I over thinking it.
It's actually being used to push a doorbell acting as a switch for something else, so it won'[t be a continuous current unless someone the button gets jammed down.
Thanks in advance...
Specs:
12 volts DC
7 watts
21 ohms coil resistance
My power supply is:
12 VDC (From an old printer or something)
1.25 Amps
I'm thinking I need to add a 15 W, 20 Ohm resistor to protect the solenoid.
Am I on the right track here, or am I over thinking it.
It's actually being used to push a doorbell acting as a switch for something else, so it won'[t be a continuous current unless someone the button gets jammed down.
Thanks in advance...