With a 1k resistor in series with the base there's no chance you're going to damage your Arduino. Even if the base voltage is 0V (it won't be -- it'll be around 1.5V) the current will be limited to 5V/1k = 5mA.The TIP122 has a current gain of 1000 so with a 1k series resistor you should be able to get 1A going through your motor.--The Ruggeduino: compatible with Arduino UNO, 24V operation, all I/O's fused and protected
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16