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Andrew Elwell
154 followers -
System Administrator and Geek at large
System Administrator and Geek at large

154 followers
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Garden Irrigation, Pt 1
Some more background to my 'home assistant powered irrigation system' -- I'll write up a couple more articles as build progresses - I'm still waiting on some critical parts to arrive, like PVC pipe fittings and an Arduino Mega. The Grand Plan. The 2 main ga...
Garden Irrigation, Pt 1
Garden Irrigation, Pt 1
blog.elwell.org.uk
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Measuring empy space
If you've been following my recent posts on twitter , you'll be aware that I've finally got round to hooking up the MaxBotix rangefinders into our water tanks. So far I've done the main house tank and have sketches and buried duct ready to do the ones that ...
Measuring empy space
Measuring empy space
blog.elwell.org.uk
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Overlaying SLURM job timings on Grafana plots
As you may have noticed, I'm quite fond of Grafana and use it at home and work. One of the dashboards I have at work is the general state of our lustre filesystems , showing IO and metadata traffic, collected by a custom python script (I'm working on conver...
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weewx to home-assistant
At home I have a Fine Offset ( this one branded by Jaycar) weather station that publishes to weather.two-fifteen.com via weewx (this is much simpler now I don't have to have the thing solar mounted in a field using a 3G dongle - at least the NBN is useful f...
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Don't count your chickens...
We have a cheapo Chinese incubator for hatching eggs. According to popular Internet postings, the calibration of the 'temperature setting' on the front vs reality inside isn't terribly accurate. Since I have a stack of 'Ruuvitags' ( https://ruuvi.com ) from...
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Plotting Lustre MDS stats
At $dayjob we have several large filesystems - for example our /scratch system has 3.1 PB of space using over 1000 HDDs. Although each vendor offers their own dashboard for monitoring they're all a little bit crap and don't integrate with anything else. Cue...
Plotting Lustre MDS stats
Plotting Lustre MDS stats
blog.elwell.org.uk
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PSU tinkering, Part 1
As  previously blogged , I've got a couple of 12v 88.7A PSUs that I'm trying to control under arduino. Stage 1 complete - It powers up with a trivial bit of code /* Arduino control for (ex) server PSU
* Andrew Elwell <andrew.elwell@gmail.com> August 2016
...
PSU tinkering, Part 1
PSU tinkering, Part 1
blog.elwell.org.uk
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I've got the power
(It's getting, it's getting, it's getting kinda hectic) So, another "I should really get round to that" project that's worked its way to the top of the desk is repurposing a skip-dived server PSU (or 4) to be more usable. Exhibit A - One ex-sun 'SPASUNM-03G...
I've got the power
I've got the power
blog.elwell.org.uk
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Handheld animal RFID reader teardown
As some of you may know, we have a small herd of llamas and although each is easily recognisable legislation and the  Llama Association of Australasia Inc. require that the animals be microchipped. As a geek, I'd also like to integrate routine monitoring of...
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