fotoartist78
Posts: 48
Joined: Fri Apr 08, 2016 1:10 pm

Pi3 lacks power

Tue Jul 05, 2016 6:26 pm

I have connected a 7 Seg single digit to the GPIO pins on the Pi3 but the segments hardly glowed, The same setup when run on the Arduino Uno the segments shone a bright red. Now I know that the Pi3 pins run at 3.3 Volts and the Arduino pins are 5 Volts but I changed the resistors to compensate for the lower voltage but it made no difference. Can anyone comment on why.

User avatar
rpdom
Posts: 18158
Joined: Sun May 06, 2012 5:17 am
Location: Chelmsford, Essex, UK

Re: Pi3 lacks power

Tue Jul 05, 2016 6:30 pm

Can you post the specifications (voltage, current, etc) for the display you used, or post a link to where you got it from?

It may be that it requires too much current for the Pi's GPIOs if it is a large display.

fotoartist78
Posts: 48
Joined: Fri Apr 08, 2016 1:10 pm

Re: Pi3 lacks power

Tue Jul 05, 2016 7:15 pm

Many thanks 'rpdom' for reply. I think you are correct in what you you say about the RPi3 pins not being able to supply enough current. In fact I have given up the experiment with this 7 Seg as being too much for the Rpi3 to drive.

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