manthony121
Posts: 13
Joined: Tue Feb 27, 2018 1:33 pm

current output on 5V header pins

Sun Jan 19, 2020 7:37 pm

I want to set up my Pi to control a 1 watt LED. The LED draws about 300 milliamp at 3.3 volts. I plan to use a GPIO pin to control a transistor to turn the LED on and off. Can the 5V pin on the J8 header provide the current to drive the LED? Or, do I need to use one of the USB ports to provide the current?

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joan
Posts: 14668
Joined: Thu Jul 05, 2012 5:09 pm
Location: UK

Re: current output on 5V header pins

Sun Jan 19, 2020 8:17 pm

Yes, provided there is enough spare from your power supply after feeding the Pi and any connected peripherals.

Which model Pi?

manthony121
Posts: 13
Joined: Tue Feb 27, 2018 1:33 pm

Re: current output on 5V header pins

Sun Jan 19, 2020 8:35 pm

Not sure. Most likely a 3 B+, but I may wind up using a Zero-W. The only other peripheral will be a camera module.

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