How much power to control 3 x12V Solenoids?
Newbie here (and to using Arduino). Sorry in advance for the dumb question:
If I'm using an Arduino uno to control three 12V push-pull solenoids, how much external power do I need? I tried using 3-12V power supply to control 1 solenoid only, but it didn't work.
FYI, in the circuit I'm also using:
- TIP120 transistor
- 1N4004 Diode
- 1K resistor
(don't have a motor shield to replace all of the above..)
Not sure where I'm going wrong. Could anyone help me please? Thanks!