The output of arduino uno pin is 5v..
But how can I make it a 12v output with 240 mA current?
I wanna connect a relay to it...
Most people use a relay board that can be switched by the Arduino, but has a separate power input connection for the relay coils.
Alternatively you can use a suitable power supply for the relay coil, and a logic level MOSFET transistor to switch it as shown below (the M is a motor or relay coil).
Okey thanks..
But what is the number of N-MOSFET ?
R2 = 180 ohms ?
C1 = ceramic capacitor ?
Why D1 is parallel with motor ?
Vsupply = 12 volts ?
The motor is about 240 mA....
Sigh!
I am going to let this one go through to the keeper!
But what is the number of N-MOSFET ? Most logic level N-MOSFETs will work.
R2 = 180 ohms ? Yes
C1 = ceramic capacitor ? Could be
Why D1 is parallel with motor ? Removes destructive voltage spikes
Vsupply = 12 volts ? If needed
The motor is about 240 mA.... You stated "relay" in the OP.