Category: Hardware

Bubbler: Monitoring homebrew CO2 production using arecord and Python

Posted by – 2012/02/08

A couple of weeks back I was thinking about monitors and sensors and had a crazy idea: it ought to be possible to gather stats on how well my plonk is fermenting by attaching a mic to the airlock and counting the bubbles. So in a moment of enthusiasm I ordered a cheap lapel microphone from eBay and forgot all about it… until Saturday morning when it finally arrived in the post.

Time for some fun!

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TEMPer1 temperature sensor in Linux

Posted by – 2012/01/15

Yey! Just got my PCSensor TEMPer1 USB thermometer logging in Linux. It automatically detects and does expose USB HID profiles, but there’s no way to access the data by holding down the CAPS key like it says in the docs.

Thankfully, a search for the device ID (0c45:7401 Microdia) finds ruby bindings for Temper.c by Michitaka Ohno, which conveniently includes the reverse-engineered USB protocol. So I’ve forked this on GitHub, removed the Ruby bits, edited the unit test wrapped it up in a little script that logs the time and temperature to a CSV file. It currently only supports one device, which will change if I ever get another one of these devices (spoiler: I probably will)

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Ubuntu printing and scanning

Posted by – 2012/01/15

I haven’t owned a printer since I had an Amiga all those years ago, but since I’ve started my homebrew mission I’ve decided I need something to print some labels. Kath got me a HP OfficeJet 4500 G510g printer/scanner/copier for my birthday, and I have to say it works wonderfully.

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