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5V Water Pump + NPN Transistor shows garbage on serial with digitalWrite() - Motors, Mechanics, Power and CNC - Arduino Forum
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Use NPN transistor as switch with 5V signal and 8V on collector - Motors, Mechanics, Power and CNC - Arduino Forum
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Using NPN transistor for either load control (LEDs) or digital signal (WS2812) - General Electronics - Arduino Forum
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Arduino: Transistor als Schalter | Interactive Prototyping Methods 2014 | Interaction Design | MA workshop | spring term 2014
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12V Motor Control With 5V Arduino and NPN Transistor As Speed Control Switch : 4 Steps - Instructables
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