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by jon wise
Wed Nov 12, 2014 8:54 am
Forum: Off topic discussion
Topic: Searching the forum
Replies: 1
Views: 651

Searching the forum

Is there a way to search the forum avoiding the normal search restrictions? For example, I want to search for node.js. The dot is ignored, then the js is too short and node has hundreds of references. Putting it in quotes makes no difference. Any ideas?
by jon wise
Mon Dec 30, 2013 5:12 pm
Forum: Automation, sensing and robotics
Topic: X10 control
Replies: 11
Views: 20641

Re: X10 control

I have just bought a CM15pro and installed Mochad software but cannot switch X10 devices, including an AM12. It does log other X10 activity, such as from SM10E, so it is reading X10 messages. Has anyone found a need for any special setup for the Pi beyond the basic install instructions for Mochad?
by jon wise
Wed Jun 19, 2013 8:51 pm
Forum: Graphics, sound and multimedia
Topic: Noise from audio jack
Replies: 4
Views: 2627

Re: Noise from audio jack

I am still struggling with this and would welcome any ideas. I want to use sound from the audio jack through a local amplifier and the project includes a couple of sensors mounted on a Ciseco Humble Pi board. It works well if powered through the micro USB socket. But I want to power it from a 12volt...
by jon wise
Mon Jun 03, 2013 8:05 pm
Forum: Graphics, sound and multimedia
Topic: Noise from audio jack
Replies: 4
Views: 2627

Re: Noise from audio jack

Thanks, it was the power supply. One does not find a solution looking in the wrong place.
by jon wise
Sun Jun 02, 2013 4:43 pm
Forum: Graphics, sound and multimedia
Topic: Noise from audio jack
Replies: 4
Views: 2627

Noise from audio jack

On connecting an amplifier to the audio jack I get a throbbing background noise at about 4 pulses a second. It is quite audible but not loud. If I run a program such as 'find' the noise changes to a buzz. The amplifier is fed with a short screened cable, has input impedance of about 1k and is quiet ...
by jon wise
Sun Apr 14, 2013 1:57 pm
Forum: Automation, sensing and robotics
Topic: 3D printer with radial arms
Replies: 2
Views: 4557

3D printer with radial arms

When a video of the 3D printer with radial arms http://www.raspberrypi.org/archives/3631 was on the news page a week ago there were requests for the software. The geometry code in Python is : #!/usr/bin/python3 import math, time, sys, os from driver import ef, eb, wf, wb, zf, zb, xf, xb class RadPi:...
by jon wise
Thu Mar 14, 2013 1:09 pm
Forum: Python
Topic: WiringPython - WiringPi for Python
Replies: 205
Views: 72897

Re: WiringPython - WiringPi for Python

Thanks - that fixed it.

Is there any work in hand to get wiringpi working with python3, or should I move back to python2?
by jon wise
Thu Mar 14, 2013 9:24 am
Forum: Python
Topic: WiringPython - WiringPi for Python
Replies: 205
Views: 72897

Re: WiringPython - WiringPi for Python

When i try to install python-dev by : sudo apt-get install python-dev
I get:
Err http://mirrordirector.raspbian.org/raspbian/ wheezy/main libssl-dev armhf 1.0.1c-4+rpi1 404 Not Found

Any ideas please?
by jon wise
Wed Mar 13, 2013 8:32 am
Forum: Python
Topic: ipython3 notebook and GPIO
Replies: 0
Views: 578

ipython3 notebook and GPIO

By trial and error I have ipython3 notebook running to provide headless access to my pi and on first use it seems an excellent tool. What is best way to start the ipython3 notebook server at boot as it needs to run as root to access GPIO, but should have /home/pi as the home directory? Does anyone h...
by jon wise
Wed Jan 16, 2013 5:46 pm
Forum: Automation, sensing and robotics
Topic: Power monitoring with Raspi
Replies: 3
Views: 2077

Re: Power monitoring with Raspi

Do these low-price meters give a true power value for non-sinusoidal or out-of-phase current?
by jon wise
Wed Dec 12, 2012 12:53 pm
Forum: Automation, sensing and robotics
Topic: Which Home Automation Technology?
Replies: 8
Views: 5684

Re: Which Home Automation Technology?

I use Dallas 1-wire and X-10 to do something similar to this. To make the system fail-safe, the computer switch is in series with a conventional thermostat so that if the computer switch does not turn off, the room temperature is limited to a reasonable maximum. As X-10 has no feed-back, I send the ...
by jon wise
Sun Nov 25, 2012 5:14 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 167547

Re: kernel patch for Dallas 1-wire interface

Where can I find a list of supported devices?
I would like to move my current greenhouse thermostat which uses DS2405 switches and DS1820 thermometers to Raspberry Pi. Will these work?
by jon wise
Tue Oct 16, 2012 8:03 am
Forum: Raspberry Pi OS
Topic: Wifi adapter
Replies: 99
Views: 59833

Re: Wifi adapter

I have access to my pi via WiFi, configured with wpa_supplicant on Raspian, using the IP number from DHCP on my BT HomeHub. How do I allocate a name to the device?
by jon wise
Sun Jul 29, 2012 8:53 pm
Forum: General discussion
Topic: Wrong author
Replies: 1
Views: 534

Wrong author

There seems to be a problem with the forum software. In the topic 'raspbian boot fails, but only on 1 board' on the Troubleshooting forum, there is a posting 'by jon wise » Mon Jul 23, 2012 6:55 pm'. The quote in this post is mine but the content is a response by someone else. It looks as if a posti...
by jon wise
Sun Jul 29, 2012 8:41 pm
Forum: Troubleshooting
Topic: raspbian boot fails, but only on 1 board
Replies: 40
Views: 4667

Re: raspbian boot fails, but only on 1 board

To tidy up my contribution to this thread, my replacement pi has arrived and works with raspbian with no problems.
(There appears to be a problem with the forum software as the earlier post at Mon Jul 23, 2012 6:55 pm with my name contains a reference to my words but the body is from someone else.)
by jon wise
Sat Jul 28, 2012 10:51 am
Forum: General discussion
Topic: Farnell VS RS delivery times
Replies: 143
Views: 31892

Re: Farnell VS RS delivery times

My second Pi arrived this morning 9 days after ordering from Farnell.
by jon wise
Mon Jul 23, 2012 5:55 pm
Forum: Troubleshooting
Topic: raspbian boot fails, but only on 1 board
Replies: 40
Views: 4667

Re: raspbian boot fails, but only on 1 board

My initial post to this topic was an indirect suggestion that hardware might be at the root of the problem. Despite being careful about electrostatics, etc, my pi is at the end of its life as Squeeze now kernel panics if I ping it. Any ideas on my initial question - "My guess is that playing with t...
by jon wise
Mon Jul 23, 2012 8:03 am
Forum: Troubleshooting
Topic: raspbian boot fails, but only on 1 board
Replies: 40
Views: 4667

Re: raspbian boot fails, but only on 1 board

Progress! With avoid_safe_mode=1 I get the raspi-config page. As my keyboard via USB does not work, I cannot get past this to see the start-up log and I do not yet have an network connection. How might I bypass the raspi-config page? (I do have another pi on order but do not have the patience to wai...
by jon wise
Sun Jul 22, 2012 9:51 pm
Forum: Troubleshooting
Topic: raspbian boot fails, but only on 1 board
Replies: 40
Views: 4667

Re: raspbian boot fails, but only on 1 board

On Squeeze, I normally use SSH from a laptop and recently found the keyboard does not work. I will try your suggestion but does raspbian start SSH demon by default?
by jon wise
Sun Jul 22, 2012 9:17 pm
Forum: Troubleshooting
Topic: raspbian boot fails, but only on 1 board
Replies: 40
Views: 4667

Re: raspbian boot fails, but only on 1 board

The vdu of my photo above was connected through the RCA socket.
by jon wise
Sun Jul 22, 2012 8:56 pm
Forum: Troubleshooting
Topic: raspbian boot fails, but only on 1 board
Replies: 40
Views: 4667

Re: raspbian boot fails, but only on 1 board

Thanks for quick reply. A photo is attached. The only device plugged in was the composite video screen.
by jon wise
Sun Jul 22, 2012 8:43 am
Forum: Troubleshooting
Topic: raspbian boot fails, but only on 1 board
Replies: 40
Views: 4667

Re: raspbian boot fails, but only on 1 board

I, too, cannot get 2012-07-15-wheezy-raspbian image to boot - it hangs after a few hundred lines of start-up log. I normally run Debian Squeeze headless to play with GPIO and that is working fine but I have just discovered that the USB keyboard no longer works. My guess is that playing with the GPIO...
by jon wise
Sat Jul 07, 2012 10:28 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: kernel patch for Dallas 1-wire interface
Replies: 227
Views: 167547

Re: kernel patch for Dallas 1-wire interface

Worked straight from the box for me as well.
Is the patch likely to work with Debian wheezy?
by jon wise
Thu May 31, 2012 9:16 pm
Forum: Troubleshooting
Topic: USB cell phone tethering to Raspberry PI
Replies: 13
Views: 41398

Re: USB cell phone tethering to Raspberry PI

My attempt to tether using Debian Squeeze to an HTC Wildfire S under Android v2.3.5 produces the following from dmesg: usb 1-1.3: new high speed USB device number 10 using dwc_otg usb 1-1.3: New USB device found, idVendor=0bb4, idProduct=0ff8 usb 1-1.3: New USB device strings: Mfr=1, Product=2, Seri...

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