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by psycho_moggie
Tue Sep 03, 2013 6:01 pm
Forum: Automation, sensing and robotics
Topic: Attaching a temp sensor to Pi
Replies: 11
Views: 4154

Re: Attaching a temp sensor to Pi

Heat conduction caught me out, I plugged a DS1621 into a solderless prototype board and wondered why my readings were high...
by psycho_moggie
Tue Sep 03, 2013 4:35 pm
Forum: Automation, sensing and robotics
Topic: Attaching a temp sensor to Pi
Replies: 11
Views: 4154

Re: Attaching a temp sensor to Pi

I agree, looking at the datasheet, it has either an I2C or SPI interface, either should work. Also it will run on a 3.3V supply and takes a maximum of 1.4mA, so can be directly connected to the Pi.
by psycho_moggie
Sun Sep 01, 2013 11:56 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Multiple I2C devices.
Replies: 4
Views: 16945

Re: Multiple I2C devices.

Every I2C chip has an address to which it will respond while ignoring all others, so provided all your devices have different addresses they will happily co-exist. Normally the address can be set within a range by tying certain pins to ground or the positive supply, so you can use multiple chips of ...
by psycho_moggie
Sun Jun 17, 2012 8:27 am
Forum: HATs and other add-ons
Topic: soldering battery pack
Replies: 11
Views: 4721

Re: soldering battery pack

The specification for the battery pack shows a maximum output current of 500mA, if it goes into current limit mode a bit higher that may be the reason for your reboot.
by psycho_moggie
Mon Jun 04, 2012 8:45 am
Forum: General discussion
Topic: USB Audio
Replies: 6
Views: 2127

Re: USB Audio

I've just tried the usb sound card that I mentioned in a previous post with my Pi and Debian. I've successfully recorded a short sample from the SPDIF input. However, when I tried to play the sample back, it came out on the front analogue channel, but the Pi locked up at the end. The same file is ok...
by psycho_moggie
Tue May 22, 2012 5:01 pm
Forum: Off topic discussion
Topic: VIA's entry into the low cost computer market
Replies: 102
Views: 14727

Re: VIA's entry into the low cost computer market

I don't think I'll be getting one, I'll have more than enough to keep me busy when my Pi turns up. I'm also trying to get some momentum going on controlling Atmel AVR devices via I2C. There's a lot of useful peripherals that can be configured via registers. I think that's enough projects.
by psycho_moggie
Tue May 22, 2012 4:35 pm
Forum: Off topic discussion
Topic: VIA's entry into the low cost computer market
Replies: 102
Views: 14727

VIA's entry into the low cost computer market

Just spotted this on The Register.
http://www.reghardware.com/2012/05/22/c ... _pi_alike/
Seems to run Android 2.3, whether Proper Linux can be run on it is something to be investigated.
by psycho_moggie
Tue Mar 20, 2012 4:42 pm
Forum: General discussion
Topic: USB Audio
Replies: 6
Views: 2127

Re: USB Audio

<r>I looked on <URL url="http://www.linux-usb.org/usb.ids">http://www.linux-usb.org/usb.ids</URL> for your usb id, it seems to be the same family of device as mine.<br/> <br/> This page, <URL url="http://www.nslu2-linux.org/wik.....udioPlayer">http://www.nslu2-linux.org/wik.....udioPlayer</URL> is a...
by psycho_moggie
Tue Mar 20, 2012 10:18 am
Forum: General discussion
Topic: USB Audio
Replies: 6
Views: 2127

Re: USB Audio

<r>I've got an external usb sound card for which lsusb reports vendor ID 0d8c and product ID 0102. It is this beastie, <URL url="http://www.ebuyer.com/106540-x.....rd-a-cm106">http://www.ebuyer.com/106540-x.....rd-a-cm106</URL>. Is yours a similar product? Mine works with my x86 linux box, I use it ...
by psycho_moggie
Thu Dec 22, 2011 8:41 pm
Forum: General discussion
Topic: How would you use a Raspberry Pi device?
Replies: 514
Views: 202568

Re: How would you use a Raspberry Pi device?

An animatronic Bagpuss, with face tracking.
by psycho_moggie
Sun Dec 04, 2011 9:35 pm
Forum: General discussion
Topic: Broadcom reaction to distructive entrepreneurship
Replies: 119
Views: 10986

Re: Broadcom reaction to distructive entrepreneurship

It\'s not Broadcom\'s Ninja Unit that people should be worried about.
It\'s Mooncake.
by psycho_moggie
Sat Dec 03, 2011 4:47 pm
Forum: General discussion
Topic: Thermostat
Replies: 6
Views: 4363

Re: Thermostat

<r>Have a look at <URL url="http://www.raspberrypi.org/forum?mingleforumaction=viewtopic&t=1202"><LINK_TEXT text="http://www.raspberrypi.org/forum?mingle ... pic&t=1202">http://www.raspberrypi.org/forum?mingleforumaction=viewtopic&t=1202</LINK_TEXT></URL><br/> You can start development b...
by psycho_moggie
Sat Dec 03, 2011 4:34 pm
Forum: General discussion
Topic: I2C programming
Replies: 25
Views: 15076

Re: I2C programming

<t>To allow yourself access to the i2c hardware<br/> <br/> Create a file /etc/udev/rules.d/30-i2c.rules, containing the line:<br/> KERNEL=="i2c-[0-9]*", GROUP="i2c"<br/> <br/> Make yourself a member of the group i2c:<br/> sudo adduser jonathan i2c<br/> <br/> Add the line "modprobe i2c-dev" to /etc/i...
by psycho_moggie
Sat Dec 03, 2011 3:54 pm
Forum: General discussion
Topic: I2C programming
Replies: 25
Views: 15076

Re: I2C programming

<r>This was all done on an Asus 1001HA running Kubuntu 10.04. The<br/> executable runs on a 701 as well.<br/> <br/> The chip datasheet is here:<br/> <URL url="http://pdfserv.maxim-ic.com/en.....DS1621.pdf">http://pdfserv.maxim-ic.com/en.....DS1621.pdf</URL><br/> <br/> Install build-essential, i2c-to...
by psycho_moggie
Sat Dec 03, 2011 11:39 am
Forum: General discussion
Topic: I2C programming
Replies: 25
Views: 15076

Re: I2C programming

<t>I've only written a single program to access a DS1621, I'll post that with a bit of an explanation and links to relevant sources. I think I've got an i2c adc chip somewhere, if I can find it I'll have a go at some code, because that would be really useful with the Raspi.<br/> Edit: I've found a P...
by psycho_moggie
Thu Dec 01, 2011 9:39 pm
Forum: General discussion
Topic: I2C programming
Replies: 25
Views: 15076

Re: I2C programming

<r>It's pretty simple to give yourself access to i2c devices with a udev rule, see<br/> <URL url="https://xgoat.com/wp/2008/01/29/i2c-device-udev-rule/">https://xgoat.com/wp/2008/01/29/i2c-device-udev-rule/</URL><br/> I used the tutorial on the same site to knock out a simple c program, gst-launch t...
by psycho_moggie
Thu Dec 01, 2011 9:20 pm
Forum: General discussion
Topic: Broadcom reaction to distructive entrepreneurship
Replies: 119
Views: 10986

Re: Broadcom reaction to distructive entrepreneurship

Broadcom\'s Ninja Unit
That sounds like a 70\'s era British funk band.
I can\'t play drums, anyone care to join me?
by psycho_moggie
Tue Nov 22, 2011 10:30 am
Forum: General discussion
Topic: I2C programming
Replies: 25
Views: 15076

Re: I2C programming

<r>Hopefully it will be like an ordinary boring pc. They make extensive use of the i2c bus for temperature measurement and other things. In Ubuntu and, I assume Debian, the package lm-sensors gives access to the internal bus and the i2c interfaces on the vga and dvi connectors. I wired a DS1621 to t...

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