Greetings guys.
I just wanna clear my doubts.
I would like to control my fan 12v 1.3A via Rf on diff speed. ( 5v,7v and 12v)
I use;
4007 Diode
1k Resistor
TIP 120 Transistor
According to Ohms Law,
V = I*R
hence R = 12/1.3
= 9.23 ohms.
Does that mean I have used the wrong Resistor?
A fan should not need a resistor at all.
A TIP 120 is not a resistor.
What do you intend to do?
Give us a circuit and description of how you want to change the speed.
Weedpha
Grumpy_Mike:
A fan should not need a resistor at all.
A TIP 120 is not a resistor.
sorry i meant Transistor
Same subject.
A motor does not obey Ohm's law!
Russell.