using a darling transistor as a switch?
my set up is an arduino uno and a NPN TIP122 darlington transistor, the LED's should draw about 1.7A max (on measurement its more like 0.2A average)
- even when the base of the transistor isn't connected to the arduino, the LEDs are still on.
- when I set the base High using 5 volts from the arduino though a 1K resistor, the LED's are really dim
Im a serious beginner when it comes to electronics so any suggestions in layman terms would be appreciated