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by coyotebush
Wed May 01, 2013 6:19 am
Forum: C/C++
Topic: Compiling for c++11
Replies: 9
Views: 18770

Re: Compiling for c++11

Try the following: sudo apt-get install g++-4.7 sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-4.6 sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.7 40 --slave /usr/bin/g++ g++ /usr/bin/g++-4.7 sudo update-alternatives...
by coyotebush
Mon Apr 29, 2013 5:52 am
Forum: General discussion
Topic: land line phone
Replies: 18
Views: 5507

Re: land line phone

> What was the reason to use your older modem, ... is there something else special > about it that the other devices recommended may not do? This is a special modem for the deaf. It communicates to TDDs (Telecommunication Device for the Deaf) using a 5-bit Baudot character set over a 50 or 45.5 baud...
by coyotebush
Mon Apr 29, 2013 2:20 am
Forum: General discussion
Topic: land line phone
Replies: 18
Views: 5507

Re: land line phone

Rethinking ... Yes, your existing USB-RS232 connector should work fine. You may have to install driver software depending on the brand, but most adapters are well supported by Linux. (When in doubt, buy FTDI brand adapters which work everywhere.) I don't know if the new USB modems support baudot. A ...
by coyotebush
Mon Apr 29, 2013 2:04 am
Forum: General discussion
Topic: land line phone
Replies: 18
Views: 5507

Re: land line phone

Some ways to hook up a modem to a PI: - Use a USB to RS232 adapter. ($3 on e-bay) - Buy an external USB modem. ($10 on e-bay), or - add a Max232 circuit to the PI's serial port ($3 on ebay) Unless I was particularly fond of the existing modem, I'd probably buy the USB modem. USB modems are very comp...
by coyotebush
Mon Apr 29, 2013 12:56 am
Forum: Automation, sensing and robotics
Topic: Battery Power
Replies: 12
Views: 4764

Re: Battery Power

Lithium batteries pack more power for the weight than other technologies, but they get expensive for large batteries. Although it has never happened to me, lithium batteries are notorious for catching fire if damaged or improperly charged. You can pick up everything you need from stores that sell R/...
by coyotebush
Thu Apr 04, 2013 1:53 am
Forum: General discussion
Topic: Transmission: No space left on device
Replies: 30
Views: 34524

Re: Transmission: No space left on device

Another possibility. Earlier, you might have unplugged the external disc drive. Files written to /mnt/hdd would have filled up the root directory instead. Now, with the disc drive plugged in, the earlier files would be hidden and would still be taking up space on root. Suggestion: "umount /mnt/hdd",...
by coyotebush
Wed Apr 03, 2013 10:20 pm
Forum: Other programming languages
Topic: Asm tuts
Replies: 63
Views: 17933

Re: Asm tuts

Being an old-time assembly programmer, I'll have to say nobody writes pure assembly any more. Instead, most code is written in "C" (or C++), and the critical pieces of assembly are written as "inlined assembly". In applications, the main use of assembly is to access atomic operands (eg. test and set...
by coyotebush
Wed Apr 03, 2013 9:56 pm
Forum: General discussion
Topic: Transmission: No space left on device
Replies: 30
Views: 34524

Re: Transmission: No space left on device

I suspect your settings.json file is not getting read by the transmission daemon. Instead of placing the downloads in the /mnt/hdd directory, the downloaded files are probably going to the default location somewhere under /var. Consequently, the root file fills up while the /mnt/hdd filesystem remai...
by coyotebush
Mon Mar 11, 2013 10:42 pm
Forum: Automation, sensing and robotics
Topic: GPS Project
Replies: 10
Views: 14823

Re: GPS Project

FYI. Here is a link to some other GPS receivers which provide "raw" data.
http://www.onetalent-gnss.com/ideas/usb-hw-receivers
by coyotebush
Mon Mar 11, 2013 10:34 pm
Forum: Automation, sensing and robotics
Topic: GPS Project
Replies: 10
Views: 14823

Re: GPS Project

If you're logging data from a stationary receiver, then it sounds like you are setting up a GPS base station. Are you considering using Rtklib for post-processing? If setting up a base station, you will need a GPS receiver which outputs "raw" measurements. You also want to use an external antenna. H...
by coyotebush
Thu Mar 07, 2013 9:38 pm
Forum: Troubleshooting
Topic: USB/serial converters (not very) broken on Pi
Replies: 162
Views: 110312

Re: USB/serial converters very broken on Pi

Likewise, the latest update fixes the crashing problem when talking to a u-blox LEA-4T GPS receiver. The receiver has an "on chip" usb to serial converter with protocol similar to FTDI. Thanks! FYI. [ 3.192047] usb 1-1.3: new full-speed USB device number 4 using dwc_otg [ 3.310744] usb 1-1.3: New US...
by coyotebush
Fri Mar 01, 2013 8:16 pm
Forum: Other projects
Topic: A DIY PoE solution
Replies: 36
Views: 87164

Re: A DIY PoE solution

Here is a $25 POE solution for the Raspberry PI. There may be cheaper solutions, but this one works “out of the box”. 1) Cisco POES5 5V power over Ethernet splitter Available from Newegg for $22. 2) Cable adapter USB 2.0 Female To DC 5.5x2.1mm Female Power Supply Extension Cable Adapter Available on...

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