Raspberry Pi Headless Music Machine

One of the motivations for getting my amplifier working again was the need to listen to music on a system with more depth and weight than a set of Logitech 2.1s can provide.

Since I left my CD collection in the UK my sources are all mp3, with a Soundcloud habit as well.

So, how to listen?  Well, I also have a Raspberry Pi habit, and they have an audio out (in my case on a Model B it’s a headphone jack).

Rotel RA-931 stereo amplifier fed from a Raspberry Pi B.
Rotel RA-931 stereo amplifier fed from a Raspberry Pi B.

Continue reading “Raspberry Pi Headless Music Machine”

Home Energy Monitor Feed

I’m fascinated by numbers (logging my exercise, monitoring the weather, logging fuel consumption) and started logging how much electricity we use at home by reading the meter.  We recently installed a solar hot water system and recent turmoil in Botswana’s power supply got me thinking about solar electricity – so how much energy do we use, and what do we do with it?

After much surfing of the internet and eBay browsing I discovered the OpenEnergyMonitor project, soon afterwards there was a box of goodies in the mail to me: a few emonTx v3s, Raspberry Pis, current transformers, temperature probes and an emonGLCD.

A couple of months ago I managed to sort out the installation (bit of a faff, but that’s another story), and now I can see how much power is being used at home from anywhere with an internet connection (as long as Orange Botswana keeps our Flybox online and the emoncms connection live).  The nice thing about emoncms is that you can also embed the charts in your own website: Continue reading “Home Energy Monitor Feed”