Raspberry Pi Forums

JimmyN

There have been IC's around for a while that do that, look at cell phones, tablets, notebooks, etc, that's what they use. The one in your link is using the same concept and applying it to a battery bank. When power is supplied it disconnects the battery from the device and starts charging it, and al...

JimmyN

The need for a PMC circuit is a must. what is a "PMC" and how i know a power-bank has it? do you happen to know what models of power-bank have the ?new chip? what allow charge and discharge at the same ?all? time? so i could run it as a "ONLINE" UPS for the RPI It's a protection circuit that monito...

JimmyN

That file doesn't work for me, there is something wrong with it, matchbox wouldn't even open. Here is the keyboard file I'm using. Rename the one you have to preserve it, and put this in ~/.matchbox and see if it works. Leave the name the same, it should be "keyboard.xml". "Keyboard.xml" is not goin...

JimmyN

Sorry, I was out of town for a bit and only had my tablet with me. I'll check into the file and see if it works for me.

JimmyN

I used Inkscape, it's free, and works well for converting pdf's to dxf for Sketchup. Open the pdf in Inkscape, then just save it choosing "Desktop Cutting Plotter(AutoCAD DXF R14)(.dxf)" as the filetype from the dropdown menu. That's actually the easiest part. When you import the dxf into Sketchup t...

JimmyN

When you're sizing a battery pack keep in mind that the rating is mAh for the cells themselves at 3.7V nominal, not the output at 5V. A 10,000mAh pack will have two 5000mAh cells in parallel, since that's the most cost effective way to do it, and will only provide around 7400mAh at 5V. So if you're ...

JimmyN

Not all apps will have a man page, that's up to the person that created it, but most will. Some apps and commands are so simple, with so few options or none at all, a man page isn't needed. Some, like Samba, include a lot of man pages and any Samba command you'd enter at a prompt will likely have a ...

JimmyN

For most commands that you'll use there is a manual page for it that shows how it's used and the options. Just preface the command with "man" and it will give you some help. So to find out about smbpasswd usage man smbpasswd When you "apt-get install" something it also installs the manual pages for ...

JimmyN

Yes, the FPC comes out at the bottom of the display, I already got bit on that issue. :mrgreen: https://www.raspberrypi.org/documentation/hardware/display/7InchDisplayDrawing-14092015.pdf . The Sketchup file was actually created from that pdf drawing. I converted the pdf to a DXF file and imported t...

JimmyN

I didn't know whether to post this in "Cases" or "Display". But since it's specific to the display, I thought this might be the best spot. I created a Sketchup file of the display and uploaded it to the 3D warehouse. Those of you that use Sketchup can import it and have an accurate component to crea...

JimmyN

https://www.raspberrypi.org/documentati ... 092015.pdf

JimmyN

I get a "404 not found error" for that link

JimmyN

It might have to be named "keyboard.xml", that is the default it loads from the list of keyboard layouts. You can probably specify a layout when you start matchbox, but I actually used the "keyboard.xml" file and edited that, so I haven't played with different names. Mine doesn't do that, it doesn't...

JimmyN

Look at this thread:
viewtopic.php?f=108&t=120955&p=818218

JimmyN

does apt-get update install the last firmware? Or not? Thanks "apt-get update" updates your local list of packages and versions that are available in the repository. It doesn't change or install anything. "apt-get upgrade" parses that package list and compares it to what you have installed. If the ...

JimmyN

I don't understand why you're getting the "mode not supported" error when the mode is listed on a tvservice query. I'm stuck and somebody with a little more expertise will need to jump in and help you out. As far as copying the text there are several ways depending on the terminal you're using. It l...

JimmyN

What do you get from this command? Does it show the same group and mode that you have set in config.txt? You may have more than one entry and a second, later entry in config.txt for group/mode is overriding the one you're editing.

Code: Select all

vcgencmd get_config int

JimmyN

Go to "/usr/share/matchbox-keyboard/" and you'll see the included keyboard layouts. I'm not at a RPi at the moment and I don't remember if there was a German layout or not. But you can customize a keyboard to anything you like, it uses an .xml file. If there is a layout you want then copy it to your...

JimmyN

texy wrote:This almost implies that
a..these displays were only assemblied very, very recently, and
b..that the glue used takes literally days to cure.

Texy

I received mine on the 10th of September and the glue is still flexible. So maybe weeks to cure and harden, definitely not days.

JimmyN

sudo dhcppcd but I got this error message. Why? [FAIL] Usage: /etc/init.d/dhcpcd {start|stop|restart|try-restart|force-reload|status} ... failed! Please tell me what I did wrong here. Thank you so much. The error message tells you that it needs to know what you want to do. sudo dhcppcd start sudo d...

JimmyN

I'd try getting the info from the TV using "tvservice". Try both modes CEA and DMT tvservice -m CEA tvservice -m DMT You've already tried Group 1 (CEA) and mode 16, and that hasn't worked well. I'd try the DMT "preferred" mode from your "tvservice" query and change to Group 2 (DMT) using that mode. ...

JimmyN

The problem with that type of adapter is finding a USB to microUSB cable with decent sized conductors. You need to look for a "power" or "charge" only cable that actually lists the wire size. This is a good example. http://www.amazon.com/PortaPow-Micro-USB-Cable-Charging/dp/B0088HTYUE/ref=sr_1_2?s=w...

JimmyN

I've experienced that as well. The adhesive used to fasten the display's metal backplate to the glass front is slightly flexible and it will move. If you hold the glass and press against the edge of the metal backplate it will move back into position and cover the gap. But it comes back when you rel...

JimmyN

As @ BMS Doug pointed out you'll need a transistor. The base leg of the transistor would be controlled by Pin #8 to turn the fan on and off.

JimmyN

Pin #4 is the 5V rail, it's not an IO pin, and it can provide enough current to run a small fan. But if you move over to Pin #8 that's an IO pin with very limited current available. If you try to power a fan directly from Pin #8 your RPi may have a short life. What does the label on the fan say rega...

Search found 1109 matches

Re: Portable Raspberry Pi battery

Re: Portable Raspberry Pi battery

Re: Change keyboard layout for matchbox

Re: Change keyboard layout for matchbox

Re: 7" Display Sketchup file

Re: Recommended Battery Pack

Re: Help with sharing text files with Windows [solved]

Re: Help with sharing text files with Windows [solved]

Re: 7" Display Sketchup file

7" Display Sketchup file

Re: Official Touchscreen Size Specs?

Re: Change keyboard layout for matchbox

Re: Change keyboard layout for matchbox

Re: Pi Display

Re: Raspbian Jessie only on ARMv7?

Re: No HDMI video for Samsung TV

Re: No HDMI video for Samsung TV

Re: Change keyboard layout for matchbox

Re: The screen is 'sliding' ( gap between screen and bezel )

Re: dhcpcd not running

Re: No HDMI video for Samsung TV

Re: Will 5V 1A power supply enough for RPi 2 MOD B ?

Re: The screen is 'sliding' ( gap between screen and bezel )

Re: Fan control?

Re: Fan control?