Author Topic: arduino pwm transistor circuit, will this work?  (Read 3268 times)

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Offline WhomBomTopic starter

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arduino pwm transistor circuit, will this work?
« on: September 22, 2010, 02:38:28 AM »
Hi guys, I thought i'll check my plans with you before i blow something up  ;) hopefully anyone can tell me if they will work



i want to pwm the led using my arduino, R1 is 200 Ohms, connected to my +5V output pin when i want the transistor to conduct. The +4.1 V can be adjusted to compensate any losses in the transistor (so i can keep the led at 3.3V)

what do you think?
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Offline billhowl

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Re: arduino pwm transistor circuit, will this work?
« Reply #1 on: September 22, 2010, 06:39:09 AM »
Circuit can be work provided you supply constant current of 350mA to the LED and the transistor having current gain of more then 20.

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