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by pjc123
Wed Sep 25, 2013 11:40 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Connecting prototype pcb
Replies: 6
Views: 1787

Re: Connecting prototype pcb

You are bypassing the Pi's fuse by connecting to either the test points or the header pins, so do it at your own risk, or simply add a fuse to your development board. You could do something similar to what I have done here with my Sainsmart card. See the following images to see how I connected my pi...
by pjc123
Wed Sep 25, 2013 11:07 am
Forum: Troubleshooting
Topic: 2 Raspberry with faulty HDMI port
Replies: 5
Views: 1280

Re: 2 Raspberry with faulty HDMI port

If it does not turn out to be an old OS or something else, I went through the same thing a while back and it turned out that the monitor was on the hairy edge of displaying or not displaying on my newer pis. The following fixed the problem: See here (Go to the HDMI section): http://elinux.org/R-Pi_T...
by pjc123
Sun Sep 22, 2013 1:10 pm
Forum: Troubleshooting
Topic: Constantly Crashing - I can't do anything!
Replies: 2
Views: 635

Re: Constantly Crashing - I can't do anything!

See if any of your issues are related to what shows up here, or are specific to a certain board version:

http://elinux.org/RaspberryPi_Boards
by pjc123
Sun Sep 22, 2013 12:58 pm
Forum: Beginners
Topic: Powering High-Gain USB WiFi adaptor
Replies: 2
Views: 1589

Re: Powering High-Gain USB WiFi adaptor

You will not damage the pi; what will most likely happen is things will just not work properly if you are trying to pull too much power, or worst case the main fuse will activate. I use a TP-Link TL-WN722N high gain dongle off of batteries, which also has injection capabilities and has a removable a...
by pjc123
Sat Sep 21, 2013 6:35 pm
Forum: Troubleshooting
Topic: apt-get dist-upgrade resulted in a non-bootable pi
Replies: 3
Views: 814

Re: apt-get dist-upgrade resulted in a non-bootable pi

OK, this was really bugging me, so I decided to try again today to do an upgrade on my restored image. “apt-get upgrade” and “apt-get dist-upgrade” both worked without any issues on both my pis. I don't know if originally it was a conflicting or corrupted downloaded package, something was wrong with...
by pjc123
Sat Sep 14, 2013 8:50 pm
Forum: Troubleshooting
Topic: apt-get dist-upgrade resulted in a non-bootable pi
Replies: 3
Views: 814

Re: apt-get dist-upgrade resulted in a non-bootable pi

I actually had come across your post and also wondered if it was related. I have a second pi that is almost identical to the first one software-wise that I could try to update and see what happens, but I don't have the time to mess with it right now. I think I will retry in a month or two and give t...
by pjc123
Fri Sep 13, 2013 8:25 pm
Forum: Troubleshooting
Topic: apt-get dist-upgrade resulted in a non-bootable pi
Replies: 3
Views: 814

apt-get dist-upgrade resulted in a non-bootable pi

So, I have never had an apt-get upgrade or dist-upgrade cause my pi to fail to boot in the many months that I have owned my two Model B, Rev 2 pis (both with an initial install version of 2013-02-09-wheezy-raspbian), but it happened today on one of those pis (Red power light only. No green SD/OS ind...
by pjc123
Thu Sep 12, 2013 11:29 am
Forum: General discussion
Topic: Your daily head/desk
Replies: 47
Views: 5423

Re: Your daily head/desk

"Especially since an Android tablet would have a virtual keyboard, no need for a mouse, a built-in monitor, built-in WiFi, and a battery that allows me to be untethered. My opinion is that anything you can do with the Pi, you could do better with something else. I'm not sure that beyond some light g...
by pjc123
Sat Sep 07, 2013 8:20 pm
Forum: General discussion
Topic: Unreliable Unreliable Unreliable
Replies: 81
Views: 12595

Re: Unreliable Unreliable Unreliable

Oh wait, I will walk over to each device in turn and plug in a keyboard and display and type shutdown then ? How many embedded devices have you designed? No. You put a button on your embedded device and use GPIO with an interrupt handler to monitor when it gets pressed and have the interrupt routin...
by pjc123
Thu Sep 05, 2013 8:13 pm
Forum: General discussion
Topic: Unreliable Unreliable Unreliable
Replies: 81
Views: 12595

Re: Unreliable Unreliable Unreliable

jonshouse wrote: How are you shutting them down?
I pull the plug.
Say no more.
by pjc123
Thu Sep 05, 2013 5:47 pm
Forum: General discussion
Topic: Unreliable Unreliable Unreliable
Replies: 81
Views: 12595

Re: Unreliable Unreliable Unreliable

I will go $1.25 for each pi. Seriously, a year has gone by and not a single corrupted card on each of my two pis. However, I run my pis off of UPS's or directly off of batteries, and always do a proper shutdown, just like I do with my many Linux desktop computers. I will tell you that I can hear the...
by pjc123
Tue Sep 03, 2013 12:32 pm
Forum: Other projects
Topic: Fireworks Launcher
Replies: 10
Views: 3270

Re: Fireworks Launcher

noob wrote:Epi, but it looksa bit heavy
The batteries are most of the weight, but since each port requires 2 Amps to launch (for a total 8 port simultaneous launch of 16 Amps), there is no way of getting away from at least one fairly hefty battery for a nights worth of launches.
by pjc123
Sun Sep 01, 2013 11:49 am
Forum: Beginners
Topic: No wifi connection on startup
Replies: 4
Views: 4962

Re: No wifi connection on startup

Add "auto" to your /etc/network/interfaces file; its purpose is to start the interface at boot. Add it to both your wired as well as your wireless connection. Here is an example of where to put it (Note that my other setting and parameters may not look like yours, so ignore those.). auto lo iface lo...
by pjc123
Thu Aug 29, 2013 1:15 pm
Forum: Troubleshooting
Topic: Persistent/reconnecting wifi
Replies: 9
Views: 34191

Re: Persistent/reconnecting wifi

Here is how I fixed the problem (or more accurately, circumvented the problem): I was having an issue when I upgraded from a Model B Rev 1 board to a Model B Rev 2 board with my TP-Link TL-WN722N, where it would only intermittently get an ip address at boot on my headless pi. I suspect that the prob...
by pjc123
Wed Aug 28, 2013 7:51 pm
Forum: Other projects
Topic: Fireworks Launcher
Replies: 10
Views: 3270

Re: Fireworks Launcher

I added a description and some videos today.
by pjc123
Fri Aug 23, 2013 7:03 pm
Forum: Other projects
Topic: Fireworks Launcher
Replies: 10
Views: 3270

Fireworks Launcher

Web site of my Raspberry Pi Fireworks Launcher.

https://www.flaminghellmet.com/launch/
by pjc123
Tue Aug 20, 2013 11:03 am
Forum: Beginners
Topic: Configuring WiFi with Connectify
Replies: 3
Views: 3122

Re: Configuring WiFi with Connectify

I used Connectify successfully when I first got my pi a year ago, but since switched to using a dedicated router to increase my range. I don't remember doing anything special to get it to work. Is the following just a bad cut and paste? (missing closing curly bracket). ctrl_interface=DIR=/var/run/wp...
by pjc123
Sat Aug 17, 2013 11:32 am
Forum: General discussion
Topic: Rev 2 and powered hubs - pi powered via micro-usb
Replies: 11
Views: 4365

Re: Rev 2 and powered hubs - pi powered via micro-usb

I have the following hub and it is specifically designed not to backfeed. It has a separate mini-usb port and cable to connect to the pi's USB data ports; I am sure all they did was not to feed power through this special port. Why buy a hub that you have to butcher later on (or modify a cable) when ...
by pjc123
Thu Aug 15, 2013 6:42 pm
Forum: Troubleshooting
Topic: Connecting to Multiple Wifi Networks
Replies: 8
Views: 4379

Re: Connecting to Multiple Wifi Networks

Your network config files are almost identical to my working ones, which also connect to two different networks in the same way, except that in my wpa_supplicant.conf file (in your case wpa_roam.conf), I specify many more parameters (mode, proto, auth_alg, pairwise, group, key_mgmt, and priority). H...
by pjc123
Tue Aug 13, 2013 10:56 pm
Forum: Troubleshooting
Topic: PCB Date for Rev 2
Replies: 6
Views: 904

Re: PCB Date for Rev 2

by pjc123
Tue Aug 13, 2013 12:57 pm
Forum: General discussion
Topic: Raspberry Pi and 8 channel relay board
Replies: 7
Views: 9219

Re: Raspberry Pi and 8 channel relay board

It is priced at £36 which is competitive with the Pi Face (which is £28) but the Custard Pi 6 supplies much more. It is made in small quantities in the UK, so not cheap and cheerful China prices I am afraid. The PCB can be supplied on it's own for a few £££s for someone to source the components and...
by pjc123
Tue Aug 13, 2013 11:14 am
Forum: General discussion
Topic: Raspberry Pi and 8 channel relay board
Replies: 7
Views: 9219

Re: Raspberry Pi and 8 channel relay board

Mistertee wrote:Here is a link to a dedicated Raspberry Pi 8 relay card that uses I2C control. This means that a number of these can be daisy chained to provide 16, 24, 32 .... upto a maximum of 64 relays.

http://www.sf-innovations.co.uk/custard-pi-6.html
Interesting.....too bad it is so expensive ($55).
by pjc123
Sat Aug 10, 2013 11:36 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO state while shutdown
Replies: 2
Views: 2640

Re: GPIO state while shutdown

I do the same thing, the only difference being that I do it in "C" and a different library. As far as the LED is concerned, all you need to do is trigger off of the UART TXD GPIO pin. It is HIGH while the pi is running and goes LOW after the shutdown procedure has completed (the file systems are unm...
by pjc123
Fri Aug 09, 2013 7:14 pm
Forum: General discussion
Topic: Multiple Raspberries as Home Servers (power supply, etc.)
Replies: 3
Views: 4293

Re: Multiple Raspberries as Home Servers (power supply, etc.

Rather than a bunch of pis, I would get something more powerful like a mini itx or one of the much more powerful small development boards, as Linux allows you to easily multitask several server programs. But if that is the way you want to go, then......to power my pi, a router, fan, external circuit...
by pjc123
Wed Aug 07, 2013 9:05 pm
Forum: General discussion
Topic: 4 Putty security issues fixed
Replies: 1
Views: 386

4 Putty security issues fixed

Just a note if you are using Putty to communicate with the pi or elsewhere. It was just updated yesterday to version 0.63, plugging 4 security holes and with many other fixes. This is the first update since year 2011. As a direct result of these Putty changes, Filezilla was updated today. WinSCP als...

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