|Created||January 20, 2013|
|Last modified||January 20, 2013|
|Tags||arduino laser npn-transistor|
How to hookup a laser module to an Arduino, using an NPN transistor to control it.
Calculation, based on 20mA typical operating current draw from the laser module.
Ic = 20mA = 0.020A
Ib = Ic/10 = 0.002A
Rb = Vs/Ib = 5/0.002 = 2500 Ohm
Laser module I used: