I’ve looked at a lot of project designs that use the TIP120, but wanted to verify the diagram that I came up with is correct and won’t totally burn up my arduino.
I’m using USB to power the arduino, a 9v battery to power a cheap 9v DC hobby motor, a 2.2k Ohm resister between pin9 and the base on the TIP120. An IN4004 diode is wired in, as well as a small .1uF on the motor (to limit noise). There is a common ground with the arduino.
Is this all correct, and is the schematic correct? Some diagrams I looked at, such as this one: http://itp.nyu.edu/physcomp/uploads/arduino_bb_pot_transistor_motor_diode.png
didn’t have a resistor on the arduino pin, or a cap on the motor, and the diode appears to be in a different location. The diagram here:
has the diode wired in parallel with the motor and no cap. Is there an advantage to one circuit over the others as far as protection?
Am I correct that the TIP120 has a max of 60V 5A with a heatsink?
If I were to use an IRF510 MOSFET instead, would it be wired in the same, and just capable of 60V 16A max?
I appreciate any help with my questions.