Raspberry Pi Forums

mc349

Are you running from the mains? You could prevent a hard power reset causing corruption, by putting a battery in your power setup. So the mains is charging the battery pack and the PI is running from the battery pack. When the mains power fails the battery still runs the PI for a while, you could ev...

mc349

The PI actually loads it's firmware (BIOS if you will) from the SD card before it starts loading the operating system. So you'll always need an SD card (or something emulating the SD card) plugged into the slot.

mc349

Since we think it's fried anyway and there's nothing to lose at this point you could try:

- Shorting out the polyfuse and see if that helps.
- Short out any diodes in the power circuit.
- Try back feeding power in via the GPIO ports / usb ports
- Try feeding power in at the test points.

mc349

To be pedantic, you're just measuring voltage there. To work out power (watts) you also need to know the current being drawn. Then you can work out the power from P= I V (i.e. power=current multiplied by voltage). Measuring the current draw is more difficult, you need to get a spare USB cable and cu...

mc349

I am a little new to this. How can i identify if overclocking is the problem Have you enabled overclocking? I doubt you'd need it for playing MP3s. If you have re-edit your config to turn it off again and retest. If that doesn't fix it then do another test with a different power source (just to rul...

mc349

Wrong photo Jim? Or maybe it needs to be shrunk?

mc349

I expect you could install the Mono framework (Open Source version of the Microsoft.NET framework) and then program in C# or VisualBasic.NET.

I would do it myself but my memory card isn't big enough.

mc349

NewAtlantis wrote:I need schematic how to shrink 12v to 5v. Anyone know how?

These are good: http://www.ebay.co.uk/itm/170734419936

mc349

The /usr/share/locale directory on my SD card is 150Mb can I get rid of the one's I don't want? e.g. fr 5Mb ru 4Mb es 4Mb de 4Mb etc. etc. My locale is currently en_GB which is what I want and I can't see myself ever using fr,ru,es or de etc. :-) root@raspberrypi:/# locale LANG=en_GB.UTF-8 LANGUAGE=...

mc349

If your goal is protecting your PI you might like to think about going with an opto-isolator...
http://en.wikipedia.org/wiki/Opto-isolator

mc349

BirchJD wrote:I guess a project for a Hadron Collider is too ambitious then.

You might find you need to jumper across the polyfuses F1 and F2 to allow the Pi to power the Collider.

mc349

Maybe the linux tool "expect" will prove helpful: http://expect.sourceforge.net/
To install type: "sudo apt-get install expect"

mc349

Update: I left my performance tests running overnight (transferring lots of data from the PI to my PC over the wireless network). Unfortunately after transferring over 75 Gigabytes my Netgear router hung and all wireless connections stopped working. I had to reboot the router to get things going aga...

mc349

Some more info: #ifconfig wlan0 wlan0 Link encap:Ethernet HWaddr 00:0f:54:11:11:11 inet addr:10.0.0.30 Bcast:10.0.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:6933293 errors:0 dropped:9 overruns:0 frame:0 TX packets:9534582 errors:0 dropped:0 overruns:0 carrie...

mc349

Hello, I have got a £3 Ralink RT5370 USB wireless adapter plugged into my pi and it's working fine, but I thought I'd test the speed of it. It says it's connected at 54Mbits / sec #iwconfig wlan0 wlan0 IEEE 802.11bgn ESSID:"wlan" Mode:Managed Frequency:2.412 GHz Access Point: 00:44:11:22:4...

mc349

If you like I'll happily swap you my old early 256Mb board (with pins!) for one of the new 512Mb versions?

mc349

This one worked first time for me: http://www.ebay.co.uk/itm/130800556591 latest Raspbian OS detected it first time and already had the right drivers installed, all I had to do was to put in my wireless AP settings in /etc/network/interfaces (If that link expired it's a Ralink 5370 device for £3) Do...

mc349

What about something like this? You use your cheap AAs to power it and then let the module regulate down to the voltage required: http://www.ebay.co.uk/itm/390513655150 Or search for LM2577 on eBay. I have one which I'm using to power the PI from a 12V source and hope to eventually put it in the car.

mc349

Are you thinking about low or high temperature extremes? Hopefully not both! If it's low temperatures put it in an insulated box maybe along with something to provide a little heat e.g. http://www.ebay.co.uk/itm/290628113668 (powered from a hub rather than from the PI of course) If that gets too hot...

mc349

I've never heard of boblight, but does this link help any?
https://code.google.com/p/boblight/wiki ... spberry_Pi

mc349

39 so I just fit the demographic. Was 38 when I ordered the PI, 39 when I received it

Just remember nerds get paid well girls...

mc349

As long as the charger output voltage is 5V DC then the raspberry PI will only draw what it needs from it. If the charger can't keep it up you'll have boot problems and crashes, otherwise it'll be fine. I use a Nokia AC-10X charger with is rated 5V and 1200mA which comfortably runs the PI, it probab...

mc349

Ok try this.. 1. Open a command prompt (bash shell / terminal) 2. cd / 3. find . | grep -i thrust The first command ensures you are in the root directory. The find command finds every file and pipes that list of files through grep which is doing a case insensitive match for the word thrust. Hopefull...

mc349

Well it's arrived. £3.49 for a AC-10X Nokia charger on Amazon UK, ordered it Sunday arrived on Tuesday so no complaints there. Just wanted to feedback that this unit seems to work perfectly with the PI, no crashes / fires so far! I'm running an old Labtec wireless mouse / keyboard + PS2 adapter ...

mc349

Just wanted to say.... It's so fast! Thank you.

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