DorkbotPDX people doing strange things with electricity

The HDLx-2416 is a neat little four-character ASCII display that just happens to fit, pin-for-pin, on top of a Teensy as if the Teensy were made for it. I snagged one from the DorkbotPDX spare parts bin after Dave showed me now neatly his Yow! project fit together. Of course, while testing the limits of Txtzyme, I had to put a Yow clone together.

My friend Karl gave me an mpx4250 absolute pressure sensor that never got built into his DIY automotive super-charger. I hooked it up to SensorServer and started recording data that looks like this:

I've pre-built hex files for the standard Txtzyme interpreter. In this post I show you where to find them and where to find a longish but still simple Txtzyme program to run on it.

Choose the download for your Teensy:

• Teensy 1.0
• Teensy++ 1.0
• Teensy 2.0
• Teensy++ 2.0

Howdy Y'all,

Can someone please confirm actual date / time for next Cult Induction? I've found conflicting dates.

http://dorkbotpdx.org/wiki/workshops - this page has 3 date possibilities listed. :) the 30th of July2010; the last Sunday of every month; and 31 July 2010 Arduino Cult Induction -- PNCA ($35).

Also, re: signing up at http://www.tempusdictum.com/tdproducts.html, the drop-down menu lists the 25th of July as the next Cult Induction (which is indeed the last Sunday of the month.)

Thanks!

Nat

(Repost: http://blog.tempusdictum.com/index.php/don/system-admin/98-all-your-atmel-belong-to-us98-all-your-atmel-belong-to-us)

Foobarred is Normal

Recently I started using my linux laptop as my primary avr-usb development environment. When I upgraded the laptop to the current Ubuntu-LTS release (10.4 aka Lucid lynx) a bunch of stuff was broken including all of the wonderful udev rules provided by my linux savvy friends at dorkbotpdx.

SiliconFarmer found this awesome little solar cell on Digikey that puts out 4V at 50 microamps. Not a lot of juice, but add a 0.33F supercapacitor, and leave it in the sun for about 7 hours, and you have enough energy to run an Atmega168V in active mode at 1MHz for about 22 minutes, or in sleep mode for 4 days (!).

Paul has built some nifty demo boards for Teensy and Teensy++ computers that have an LED and push button for every available pin. After struggling through an obscure USB bug, I'm proud to say that I've got these lights a blinkin'.

http://www.youtube.com/watch?v=lhp6P9Ygsoc&feature=player_embedded#!

Location: Pacific Northwest College of Art, NW 12th and Johnson, room 205 Date: June 27th Time: 1pm to 5pm

Hey everyone, it's that time again! Fight the weather and join us at our quarterly/semi-annually Open Lab!

This one's promising to be pretty active.

We'll have:

- Erik Walthinsen giving Xmega demonstrations (is that right, Erik?)

- Jim Larson, Scott Dixon, and I (Laen) will be teaching hot-plate surface mount soldering (if you want to give it a try yourself, bring something to solder, or we'll have parts you can buy and cook on the spot).

If you have something to teach, something you want to learn, or a project you'd like to work with others on, reply to this post and put it on the list! (Or just show up. It's just that kind of workshop.) The more people that come, the more value everyone gets out of it.

Thanks!

-Laen

The Txtzyme Remote Server offers a Web 2.0 style interface through simple scripts written in Ruby and JavaScript. I've tested this by adding smart phone friendly signal processing. It looks like this:

Once you have selected a channel, you can refresh the waveform by tapping the display. (I've experimented with higher bandwidth communication but find it to be sporadic on the phone.)

This is what the Ruby (Sinatra) request handler looks like: