I read that Darlington transistors are good for controlling DC motors, or ULN2003, that it a darlington array, so you ground the terminal you want, and the motor runs.
I've also read that a normal transistor can be use for this task, BD140, for example (up to 1.5A Ic).
But this seems confuising for me. While Darlingtons in ULN2003 only support 500-600mA Ic, and have quite high hFE, BD140 have a much higher max Ic current, but much lower hFE (over 25 min).
What is the best choice?
Many thanks
I've also read that a normal transistor can be use for this task, BD140, for example (up to 1.5A Ic).
But this seems confuising for me. While Darlingtons in ULN2003 only support 500-600mA Ic, and have quite high hFE, BD140 have a much higher max Ic current, but much lower hFE (over 25 min).
What is the best choice?
Many thanks