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by klricks
Fri Mar 01, 2013 2:41 pm
Forum: Beginners
Topic: SD card seems to have lost space
Replies: 14
Views: 7371

Re: SD card seems to have lost space

I have a new SD card that is supposed to hold 4GB, but after formatting it and trying to install a different OS than what was preloaded, my capacity almost completely vanished, leaving me with 65MB. I am not new to formatting drives, but I have never experienced such a thing. This drive is now wort...
by klricks
Thu Feb 28, 2013 1:53 pm
Forum: HATs and other add-ons
Topic: External power to cheap hdmi to vga converter
Replies: 8
Views: 2785

Re: External power to cheap hdmi to vga converter

Ok so I will try to connect external power to the converter and share my experiences here. EDIT I've connected external 5V power between 18pin and GND on converter and it's working fine. But the quality of this converter is quite poor and i have problems using 1080p resolution (once it's working bu...
by klricks
Thu Feb 28, 2013 1:42 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Uart isn't working
Replies: 12
Views: 3028

Re: Uart isn't working on new version of linux

I am also having some trouble with latest release of Raspbian 2013-02-09 I have been using 2 programs CuteCom and minicom. Minicom (text based) works fine for both RX (data in) and TX (data out) . However CuteCom (GUI based) has trouble with TX to my serial device. It does work sporadically from ti...
by klricks
Thu Feb 28, 2013 1:31 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RS422 Port
Replies: 9
Views: 11904

Re: RS422 Port

Also using a resistor voltage divider is not a reliable way to do the 3.3 to 5V level shift.
by klricks
Wed Feb 27, 2013 8:38 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: How to expand UART for Rpi
Replies: 1
Views: 747

Re: How to expand UART for Rpi

Not sure what you mean by expand UART?
If you mean configure the port for RS232 (serial) devices then have a look at my tutorial here:
http://64.13.91.137:86/Comp/RPi/Rpi.html
by klricks
Wed Feb 27, 2013 2:35 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: UART / COM / RS232
Replies: 7
Views: 7554

Re: UART / COM / RS232

I think the 2nd link is referring to the Broadcom2835 specification which is not entirely implemented on the RPi. The Broadcom has over 50 GPIO pins. Some of the functions may have been combined or shared on the RPi for example TX (GPIO 14) and RX (GPIO 15) are shared by UART0 and UART1. See page 10...
by klricks
Wed Feb 27, 2013 1:20 am
Forum: General discussion
Topic: Wifi Problems
Replies: 9
Views: 1018

Re: Wifi Problems

On your router DHCP settings... Do you have max number of users set to allow enough IP's for everything on your network?
by klricks
Tue Feb 26, 2013 2:52 pm
Forum: HATs and other add-ons
Topic: Random WiFi modem disconnects from USB hub?
Replies: 2
Views: 1970

Re: Random WiFi modem disconnects from USB hub?

A couple of possibilities: You power supply can not handle the load or The RPi + WIFI is drawing more than 700mA. If that is the case then fuse F3 would be limiting the available current even if the power supply could handle the load. In my case I have an HDMI to VGA adapter + a WIFI dongle which pu...
by klricks
Tue Feb 26, 2013 1:45 pm
Forum: General discussion
Topic: VGA Trouble
Replies: 6
Views: 906

Re: VGA Trouble

I have the same converter. Try this....... not a permanent solution but may get it to work so you can reconfigure the RPi as others have mentioned. Boot the RPi with the power to the converter disconnected. Then plug in the power to the converter. When I did that the system defaulted to a lower reso...
by klricks
Tue Feb 26, 2013 1:30 pm
Forum: General discussion
Topic: Cannot Connect to Port 10000 on LAN
Replies: 3
Views: 1635

Re: Cannot Connect to Port 10000 on LAN

Check that the firewall on the laptop is not blocking your port. You don't have to open port for remote access unless you (and everyone else) want to access your web site from external locations. In that case your URL would become the IP that your ISP gave you with the :10000 appended. For example m...
by klricks
Mon Feb 25, 2013 1:56 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RS422 Port
Replies: 9
Views: 11904

Re: RS422 Port

Do you have a diagram of your circuit? What are you using for level converters? You need level converters for both the TX and RX lines. http://www.amazon.com/gp/product/B004G58W28/ref=olp_product_details?ie=UTF8&me=&seller= You might instead try the MAX3488 chip which is 3V3 for both digital in out ...
by klricks
Sun Feb 24, 2013 9:42 pm
Forum: HATs and other add-ons
Topic: USB backpower issue with hdd dock
Replies: 3
Views: 1752

Re: USB backpower issue with hdd dock

USB is not supposed to backfeed through the connecting cable if they are being compliant with the USB specs. Some cheap USB hubs do backfeed power however. Also rev 1 RPi board have a fuses on the USB ports which will limit the backfeed too much to run the RPi. The enclosure you bought does have IDE...
by klricks
Sun Feb 24, 2013 2:57 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Uart isn't working
Replies: 12
Views: 3028

Re: Uart isn't working on new version of linux

can you please upload somewhere your old card image? (just do dd but with swapped if and of) See is this works http://downloads.raspberrypi.org/download.php?file=/images/raspbian/2012-10-28-wheezy-raspbian/2012-10-28-wheezy-raspbian.zip Couldn't find a direct link for older images so I reconstructe...
by klricks
Sat Feb 23, 2013 3:01 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Uart isn't working
Replies: 12
Views: 3028

Re: Uart isn't working on new version of linux

I am also having some trouble with latest release of Raspbian 2013-02-09 I have been using 2 programs CuteCom and minicom. Minicom (text based) works fine for both RX (data in) and TX (data out) . However CuteCom (GUI based) has trouble with TX to my serial device. It does work sporadically from tim...
by klricks
Sat Feb 23, 2013 1:05 am
Forum: General discussion
Topic: Using a USB drive as memory after bootup
Replies: 1
Views: 424

Re: Using a USB drive as memory after bootup

Just insert the USB drive and use the file manager like you would on any other computer.
by klricks
Fri Feb 22, 2013 2:32 am
Forum: General discussion
Topic: expand File System issue
Replies: 4
Views: 1557

Re: expand File System issue

I think what I have falls into one of the compatible ones. This is what I have exactly. http://www.amazon.com/Kingston-Digital-Memory-SD10G2-16GB/dp/B004TS1IG4/ref=sr_1_12?s=electronics&ie=UTF8&qid=1361499455&sr=1-12&keywords=kingston+sd+card It sucks that I cannot expand the size, because pretty m...
by klricks
Fri Feb 22, 2013 1:04 am
Forum: General discussion
Topic: expand File System issue
Replies: 4
Views: 1557

Re: expand File System issue

Have a look at this compatibility list:
http://elinux.org/RPi_SD_cards
by klricks
Fri Feb 22, 2013 12:46 am
Forum: General discussion
Topic: New to RPi and diving straight in!
Replies: 1
Views: 467

Re: New to RPi and diving straight in!

I have info on my web site about setting up a serial connection to the RPi and accessing serial data through a network connection.

http://64.13.91.137:86/Comp/RPi/Rpi.html
by klricks
Thu Feb 21, 2013 2:13 pm
Forum: General discussion
Topic: VGA to HDMI or S-Video to VGA not working?
Replies: 3
Views: 1924

Re: VGA to HDMI or S-Video to VGA not working?

Hi, I've just bought a Rasberry Pi, and I need to be able to connect it to a VGA monitor as I am planning on using these for RDS in our 100 desktop environment, and all our monitors are VGA. I've confirmed it boots with HDMI to HDMI with no issues. I have tried a VGA to HDMI converter, with a femal...
by klricks
Wed Feb 20, 2013 2:39 pm
Forum: General discussion
Topic: Electrostatic protection
Replies: 1
Views: 417

Re: Electrostatic protection

I would treat the RPi the same as any exposed electronic board or component - memory modules, CPU's, PC cards etc. Use anti static bags for transport. Discharge static from you body before handling etc. Even the ESD/surge diodes can take only a limited number of zaps before they ere rendered useless.
by klricks
Tue Feb 19, 2013 3:29 am
Forum: General discussion
Topic: 5V Regulation
Replies: 2
Views: 841

Re: 5V Regulation

I would use the 9.6 V batteries if you can because not as much power is wasted as heat. The 7805 efficiency drops off dramatically at higher input voltages. You probably don't need capacitors if using batteries. I would look into using switching or 'buck' type regulator instead. Kind of expensive bu...
by klricks
Mon Feb 18, 2013 4:24 pm
Forum: General discussion
Topic: USB Monitor, Electrical Feedback through USB
Replies: 7
Views: 1447

Re: USB Monitor, Electrical Feedback through USB

Thanks, yes I have a rev. 1 board (actually, several). My hub doesn't backfeed (that was the point of switching to it). Thanks for making clear the danger of backfeeding power via the USB connection. Hopefully people will see this thread before making any dangerous choices. With luck, the Raspberry...
by klricks
Mon Feb 18, 2013 2:02 pm
Forum: General discussion
Topic: Limited App selection?
Replies: 3
Views: 542

Re: Limited App selection?

If you have instaledl Raspbian "wheezy" and the apt-get GUI Synaptic. Within Synaptic one can search through various categories of available software http://debianarmpi.blogspot.co.uk Thanks Synaptic is much easier to use than the text based Aptitude Package Manager that comes pre loaded in Raspbian.
by klricks
Mon Feb 18, 2013 2:47 am
Forum: General discussion
Topic: USB Monitor, Electrical Feedback through USB
Replies: 7
Views: 1447

Re: USB Monitor, Electrical Feedback through USB

No real difference Rev 1 or 2 if your hub does not backfeed power through the USB port. If your HUB does backfeed power then with rev 2 the power supply on the HUB would run the whole board and you would be running with no fuse protection. If rev 1 you might get an LED lit up but the RPi probably wo...
by klricks
Sun Feb 17, 2013 11:25 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: RS485 and Raspbery Pi
Replies: 9
Views: 24658

Re: RS485 and Raspbery Pi

Go to Ebay and search [3.3 Volt RS485]

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