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by venderbroeck
Wed Dec 12, 2012 7:16 pm
Forum: Beginners
Topic: raspberry pi power
Replies: 12
Views: 1834

Re: raspberry pi power

I have tried a few ways of powering the pi without result. The last thing I tried was a very stable PSU used by my father to experiment with electronics. I connected it directly to the GPIO pins, and it booted up fine with only a keyboard, lan, and hmdi connected. After half a minute the screen went...
by venderbroeck
Wed Dec 12, 2012 12:15 pm
Forum: Beginners
Topic: raspberry pi power
Replies: 12
Views: 1834

Re: raspberry pi power

Allright, so what is the best course of action for me then? Should I return the board, or attempt to replace the polyfuse myself? Does powering it via the GPIO header bypass said polyfuse? I can live with powering it via GPIO pins. I bought the raspberry to learn a little more about Linux and to try...
by venderbroeck
Wed Dec 12, 2012 11:44 am
Forum: Beginners
Topic: raspberry pi power
Replies: 12
Views: 1834

Re: raspberry pi power

I've measured the resistance of the f3 fuse. It's about 0.6 ohm on my multimeter. I will now try different psu setups, and post my findings. edit: I've also read about problems with the f1 and f2 fuses. My raspberry doesn't seem to have these, but has a yellow smd next to the act led instead. I can'...
by venderbroeck
Wed Dec 12, 2012 7:47 am
Forum: Beginners
Topic: raspberry pi power
Replies: 12
Views: 1834

Re: raspberry pi power

I will measure the resistance of f3 first then. I believe my pi is a type b rev 1.0 one. It has 512 mb ram. I will check where it was manufactored when I get home. The atx supply is an unbranded one, so that could be. I will try a higher grade corsair one. Backfeeding means using the gpio right? Doe...
by venderbroeck
Wed Dec 12, 2012 12:26 am
Forum: Beginners
Topic: raspberry pi power
Replies: 12
Views: 1834

Re: raspberry pi power

Where is FS3 located? I can't seem to find it. Also I tried powering it via GPIO pin 2 and 6. On the powerpack this still results in low voltages, but on the atx psu it now reads 5.1v with nothing attached and 5.0 volts with everything attached. It still crashes when running apt-get update... Frustr...
by venderbroeck
Tue Dec 11, 2012 11:43 pm
Forum: Beginners
Topic: raspberry pi power
Replies: 12
Views: 1834

Re: raspberry pi power

I've ruled out the usb hub. I connected a micro usb cable directly to a molex connector of the PSU. The raspberry is now running with nothing attached but the sd-card. I read 5.1 volts at the molex connector, but at the tp1 and tp2 points I read 4.8 volts. With everything attached it drops to 4.6 an...
by venderbroeck
Tue Dec 11, 2012 11:12 pm
Forum: Beginners
Topic: raspberry pi power
Replies: 12
Views: 1834

raspberry pi power

I recieved my raspberry Pi a few days ago and have been trying to set it up ever since. At first everything was looking great, I bought a new sd-card from adata and installed raspbian wheezy. After connecting the lan cable, the first problems started to arise. It would crash suddenly at random momen...

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