android.sullivan.za.org

paul.sullivan.za.org

Raspberry Pi as Dual Trace Oscilloscope

http://paul.sullivan.za.org/raspberry-pi-oscilloscope

MagPi - Issue 24. Everyday Electronics - October 1991, pages 620-626. Using the Raspberry Pi as an Oscilloscope. An Oscilloscope is right up there next to the DVM. As a must have. I've used a Hung Chang HC-L202 20MHz Dual Trace that I managed to "rescue" from someone around 15 years ago. It's not portable and being analogue it's only good for repeating signals. No chance of debugging signalling or data (like I2C). I'm not serious enough about having a Digital Storage Oscilloscope that would buy one.

paul.sullivan.za.org

GPS track of journeys

http://paul.sullivan.za.org/journeys

Treptower Park / Spree Park. Walking around Treptower Park / Spreepark Funfair in Berlin. From: 2016-09-08 16:20:30 until: 2016-09-08 19:40:00. Dorking to Gatwick, then to Povey Cross minicab waiting area. From: 2016-06-27 15:30:00 until: 2016-06-27 16:05:00. Brecon Beacons, Waterfall. Brecon Beacons, Waterfall. From: 2016-04-24 11:12:00 until: 2016-04-24 12:08:00. Brecon Beacons, 4 Peaks. Brecon Beacons, 4 Peaks: Corn Du, Pen y Fan, Cribyn and Fan y Big. East London to Johannesburg. From: 2014-11-16 09:...

paul.sullivan.za.org

9x9 Sudoku Solver

http://paul.sullivan.za.org/sudoku-solver

This tool was born out of frustration expienced in solving computer generated Sudoku puzzles (from my TV) where there is clearly an ambiguous solution. The logic is very basic, it just blindly tries every number in every block filling in any with a single solution and continues until a pass is unable to solve anymore. (It's then either unsolveable or solved). In some situations the answer given here is one of a number of possible correct ones. Will not solve puzzles where Hidden Singles.

paul.sullivan.za.org

Open source mobile telephony using SIP trunks and Asterisk

http://paul.sullivan.za.org/mobile-open-source-telephony-sip-asterisk

I want the option (if it's appropriate) to both contact and be contacted anytime anywhere. I want good quality voice. I'm fiercly suspicious of anything given away for "free" so Skype and similar services are not really options here. I want to be in control of my calls and recordings. Using a mobile phone handset (Samsung Galaxy S3) and DISA / SIP to come as close as possible to providing ubiquitous telephony. Ubiquitous open source telephony. Download the APK I'm using. Originally from East London.

paul.sullivan.za.org

These companies provide excellenent service

http://paul.sullivan.za.org/good-service

I've had enough of big companies/organisations getting away with shoddy service, or disregarding single clients. And other organisations not getting credit for GOOD service. So I've decided to keep track! Andrews and Arnold Ltd - AAISP. Originally from East London. In South Africa. I recently moved to Dorking. Surrey having previously lived in the London Borough of Sutton.

paul.sullivan.za.org

Foreign Exchange (Forex ) rate graph API rendered via JSON with jqPlot

http://paul.sullivan.za.org/jqplot-exchange-rate-graph-api

Click on a rate pair to see the graphs appear under their respective headings on the left. LHS/RHS shows an example of a new page load, LHSRHS (no /) shows an example of an in page load. Foreign Exchange (FX) rate / Currency graphs API and rendering with jqPlot. Currency graphs are a nice-to-have marketing for a website, perhaps as a "free to see", value added service. The option presented here uses delayed market pricing, by about an hour, for a non margin trading application should be adequate. Surrey ...

paul.sullivan.za.org

Cyanogenmod on A Samsung Galaxy S3

http://paul.sullivan.za.org/cyanogenmod-on-samsung-galaxy-s3-without-gapps

Not so much about root access as it is getting rid of the manufacturer bloatware. Things have come a long way since my G1, this process is now well documented and there are lots of protections to prevent bricking the phone. There are certain APK files. That you might need, among others Google Maps. Cyanogenmod (version 10.2.0, Android 4.3 Jelly Bean) on my Samsung Galaxy S3. In my case this wasn't so much about root access as getting rid of the Samsung bloatware. Installed the 2X RDP from http:/ www....

paul.sullivan.za.org

Monitoring and exception reporting/alerts with Nagios

http://paul.sullivan.za.org/monitoring-systems-with-nagios

It starts with a desire to know without having to find out from users/client when systems are in an unusable state, but you can head down a rabbit hole that you never return from. Files available for download:. Modified to return (in the case of the target being a directory) the total size. And the time of the oldest file. The point of this is to use a single call to report on backup mount. Revised check ast reg. In PHP and without reliance on external libraries. The most basic setup. I've never yet actu...

paul.sullivan.za.org

I've had a Bad Experience with these organisations

http://paul.sullivan.za.org/bad-service

I've had enough of big companies/organisations getting away with shoddy service, or disregarding single clients. And other organisations not getting credit for GOOD service. So I've decided to keep track! Metrobank and the Financial Ombudsman lack the required technical knowledge to deal with issues involving Internet technologies. Gradwell sells SIP trunks, just don't ask them to support them. Topps Tiles, bad product, worse customer service from head office. First National Bank (FNB).