Arduino Switch V.3

238

03:23:04

How to control something that draws a lot of current by using a different power source and a common ground

published 7 years ago

Sgd0072

7 years ago

I'm no expert but i don't think you're supposed to use an NPN transistor to switch a positive voltage. You should also use a pulldown or pullup resistor to the base of the transistor.

hurz

7 years ago

@Sgd0072, right a PNP is the better choice here as common emitter and not a voltage follower NPN or common collector. Check this http://everycircuit.com/circuit/5190130301403136

risingfreak1218

7 years ago

Thank you guys, it's been updated, using a pnp transistor was the correct way

2ctiby

7 years ago

@risingfreak1218 ... You might want to consider using a N Mosfet: http://everycircuit.com/circuit/4995403127980032

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