Current draw

Help with Raspberry Pi Foundation Boards (Raspberry Pi, Pi Zero, Pi Zero W, Pi A, Pi B, Pi B+, Pi2 B, Pi3 B, Pi 3 B+)
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Kb5wne
Posts: 2
Joined: Fri Feb 15, 2019 5:02 am

Current draw

Post by Kb5wne »

Has anyone have a general idea what a pi 0 and hat draw? Trying to make a power cord to plug into my trucks 12 volt fuse block. Trying di figure what voltage regulator I need trying to keep it as small as I can hoping to be able to cover it with heat shrink tubing.
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KE0FHS
Posts: 1122
Joined: Wed Apr 11, 2018 8:40 pm
Location: Colorado, USA
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Re: Current draw

Post by KE0FHS »

Bud, W0RMT, posted a good article comparing the RPi 3A+, 3B+, and Zero W:
Choosing a Pi for your Pi-Star hotspot
http://coloradodigital.net/03-11-2019.html

The article includes information about energy usage. It should help you get closer to the answer you need.
73, Toshen, KE0FHS
Playing with Pi-Star (unofficial notes about setting up and using Pi-Star):
https://amateurradionotes.com/pi-star.htm
Kb5wne
Posts: 2
Joined: Fri Feb 15, 2019 5:02 am

Re: Current draw

Post by Kb5wne »

Wow am I reading the specs correct? 180ma.
My pi-star CPU runs at 110 to 120 degrees when it was in a unvented c4 case 180ma at 5 volts how is it creating that much heat?
That's less than .9 watts. Or is my math fuzzy.
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