and TIP120 require base current 120mA!
Quoteand TIP120 require base current 120mA! Last time I looked, the TIP120 has a gain of something like 1000. EDIT: The 120mA comes under "maximum ratings" for base current.With a gain of 1000, you should require only 3.5mA for your load.
but what i have is 0.03mA?is this normal output reading for arduino!!!cuz in the specifications of the hardware it says output 40mA?
Is bad idea to drive a bipolar transistor with collector connected to 12 volts and base connected trough resistance to ardu,you have to add some protection
My output pin from arduino is 4.9v and 0.03mA