Hi.
I've love to do some kind of tests about power usage of various peripherals and how they affect the Pi but I have no clue where I'd start. Does anyone have any pointers? I assume I'll need some kind of meter to measure, but I'm a newbie when it comes to electronics.
--
Mike
How can I measure the power usage of peripherals?
5 posts
My Raspberry Pi blog with all my latest projects and links to articles
http://raspberrypipod.blogspot.com. +++ Current project: PiPodTricorder - lots of sensors, lots of mini-displays, breadboarding, bit of programming.
http://raspberrypipod.blogspot.com. +++ Current project: PiPodTricorder - lots of sensors, lots of mini-displays, breadboarding, bit of programming.
- Posts: 209
- Joined: Mon Jun 25, 2012 10:41 am
Moved your post to troubleshooting. It should receive more attention here 
I'm not a part of the Raspberry Pi Foundation, I'm just a very enthusiastic fan helping out in the forums and wiki.
Norwich Raspberry Pi User and Developer Group is meeting Saturday 9th March! See http://norwichrpi.org.
Norwich Raspberry Pi User and Developer Group is meeting Saturday 9th March! See http://norwichrpi.org.
-
- Moderator
- Posts: 261
- Joined: Fri Oct 28, 2011 7:41 am
- Location: Norfolk, UK
Something like this maybe
http://www.maplin.co.uk/plug-in-mains-p ... itor-38343
I'd imagine if you note down usage for the Pi alone then add peripherals you can see the difference and work out what each thing uses.
http://www.maplin.co.uk/plug-in-mains-p ... itor-38343
I'd imagine if you note down usage for the Pi alone then add peripherals you can see the difference and work out what each thing uses.
- Posts: 49
- Joined: Thu Apr 05, 2012 3:44 pm
I have the same question. I have just bought a digital multimeter, and it can measure volts but not milliamps over 200mA. Can the question be answered by testing the voltage at TP1-TP2 with different devices plugged in?
FORUM TIP: To view just one person's posting history, sign in, click on their user name, then click on "Search User's Posts." || This Pi owner is running Arch on 512MB Model B.
- Posts: 971
- Joined: Fri Mar 16, 2012 5:20 am
- Location: California
Something similar to what Beanz posted is available in USA called KILL A WATT, but that only tells you power used at the wall outlet to the nearest watt, which is only about 3-4 watts. With AC current you cannot directly calculate watts from amps x volts like for DC current because AC volts and amps can be slightly out of phase with each other resulting in less watts than VA.
You would need a multimeter that reads amps and rig up some way to put that in series with the 5 VDC. 0.1 A = 100 mA.
You would need a multimeter that reads amps and rig up some way to put that in series with the 5 VDC. 0.1 A = 100 mA.
- Posts: 357
- Joined: Mon Dec 03, 2012 2:47 am
- Location: Elgin, IL USA