g.mccormick
Lifetime Supporting Member
Customer has a 12VDC solenoid. I have a 24VDC DO.
Solenoid specs.
12VDC
4.7W
P=IV= 4.7 = 12 * I
I=0.39A
If I want to drop the 24V to 12V going into the solenoid, I need a resistor in series. The resistor would need to be:
(24V - 12V)/ 0.39A = 30OHMS
So I need to find a roughly 30ohm resistor with a power rating equal or greater than 5W correct?
Solenoid specs.
12VDC
4.7W
P=IV= 4.7 = 12 * I
I=0.39A
If I want to drop the 24V to 12V going into the solenoid, I need a resistor in series. The resistor would need to be:
(24V - 12V)/ 0.39A = 30OHMS
So I need to find a roughly 30ohm resistor with a power rating equal or greater than 5W correct?