While constructing content for a Plex Media Server (PMS) at home I’ve recently need to both split and merge .m4v files containing h264/aac encoded material. These are my notes to myself of what I did using ffmpeg after much googling. If you’re not me, hope these notes help you too :) Splitting an m4v file Hypothetically, I’ve ended […]
Back on April 19th 2015 I ordered a Optical Digital Coaxial Toslink Signal To Analog Audio Converter Adapter from Banggood.com. It arrived April 30th 2015. For my own records — it works! Very simple use-case: The TV in our front lounge had a Toslink optical audio port, but no headphone jack. How to use headphones? An adapter, […]
I purchased a cheap clone of the Saleae Logic 8 port logic analyser (LA) from Banggood.com on Dec 16th 2014. This page reflects my initial experiments with using the device under Windows 7 and FreeBSD 9.1. The clone does 8 channels of digital capture (no analog capture) and peaks at only 24MHz sample rate, but […]
Recently purchased an MB102 dual power supply from Banggood.com as part of a supply+breadboard+wires combo pack. Nice little unit — provides regulated 3.3V or 5V rails from 6.5-12 V (DC) or USB power supply, and has pins set up for plugging into a standard breadboard. The two separate output rails are independently configurable for 3.3V or […]
In December 2009 I rebuilt my home file server to be a FreeBSD 8.x machine with six 1.5TByte Western Digital HDDs in a ZFS raidz2 configuration. From February 2nd 2010 I’ve been sampling the internal SMART temperature senors of each drive every 6 minutes. This post summarises some of what I’ve captured.
I’m experimenting with building animations to help early-year students visualise the relationships between signals and statistics about signals. For example, I constructed the following animated gif to show how the sampled data points from a sine wave, and a randomised sequence of the same sampled data points, results in the same CDF at multiples of […]