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I was wondering how long the CO2 tank should last when used for both carbonating and serving the beer. The carbonation consumption is not insignificant. Assume: 1 keg is 5 gallons There’s 0.134 cu ft/gallon. Thus, 5 gallon is 0.67 cu ft. 2.2 “volumes” means there is 2.2*0.67 = 1.47 cu ft [...] My first Arduino project was to build a battery capacity tester. I’ve got a box of rechargeable AA batteries, and it seams they’ve been less and less effective. Since most applications require 4 batteries, invariably one problem battery makes the rest of them look bad. The Atmel ATMega328 microcontroller has 6 analog inputs with [...] Success has been had … finally! A couple of days ago, a tiny little package arrived from Sparkfun Electronics with my first Arduino kit. Valerie’s response upon finding said package in the mail box, “well, so much for seeing my husband for the rest of the week”. In all fairness, I waited [...] I just stumbled on a new feature of the iPhone 3.0 software — using the copy/paste feature, you can send a full resolution picture in an email: In the picture browser, tap the picture to highlight it and make the “copy” button appear. Tap the copy button. Recently purchased a Garmin Nuvi 760 GPS for the car/motorcycle. All in all, it’s lived up to expectations and does the advertised job. But, it’s not without quirks and annoyances. It came with a 3-month teaser introduction to the Clear Channel FM traffic service which allows the GPS to “intelligently” determine how bad traffic is and reroute [...] I’d really like the last 18 hours of my life back. Lesson 1) backups are only as good as your backup strategy. Lesson 2) your backup strategy is useless if its never been tested to recover from bare metal. Lesson 3) your ill conceived, unproven backup strategy will bite you. And it will not be for a reason that [...] There’s a great “how to” here. Some of the key things that I always forget about my setup that haunt me later: I’m using sasldb2 (in /etc/sasldb2 ) Never realized how easy it is to duplicate a directory tree from one machine to another through the network without building an intermediate tarball and finding room for it and the original files all at the same time. Simply pipe the tar command through ssh and untar it on the fly. For example, suppose we have direcotry [...] The Via Epia mini-ITX boards are some of the lowest power around. Epiacenter.com has a power simulator that’s good for comparing the differences in boards. Although, I’ve noticed that the VB7001G board I’m using has inconsistent results on the calculator — 16.23 watts idle versus 13.92 in “network mode”. Take it for what it’s worth. While [...] |
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