|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:
Thx for the info. Did you used the arduino 5 volt or an external power source?
February 27, 2013
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