OPEN LAB at Control-H, 7608 N. Interstate, Portland, OR 97217 Sunday, May 31, 2015 1-5pm While having a single teacher and many students helps get ideas and skills out to the community, sometimes it is more fun to have some chaos. So instead of one to many, we'll have many to many. Bring a project or collaborate on someone else's project. We provide space and power. You bring tools and projects. Ask fellow dorks for help and offer help to others. RSVP by replying to this page and telling folks what you'll be working on!
Often I've been asked how to get synth control voltage (CV) into an analog input pin. Teensy 3.1 has 13 bits effective analog resolution, good enough for many CV applications, but the stable internal reference is only 1.2V with analogReference(INTERNAL).
This simple circuit converts the -5V to +5V CV signal range to the 0 to 1.2V ADC input range.
Learn how to:
Sunday, April 26th, 1-5pmwith Ward Cunningham
We are also looking for a couple of helpers, please contact firstname.lastname@example.org if interested.
I have 4 12v strands of 50 WS2801s for sale (200 Adressible RGB LEDs total). If someone is willing to swap a $100 bill for them, they're yours.
In this presentation, Joe details the trials and tribulations behind creating his most ridiculous oeuvre yet.
Joe Grand (@joegrand), also known as Kingpin, is a computer engineer, hardware hacker, product designer, teacher, advisor, runner, daddy, honorary doctor, TV host, member of L0pht Heavy Industries, and the proprietor of Grand Idea Studio (grandideastudio.com).OpenDork
Your short (5-minute) ligtning talks about an interest or project you've been working on!AttachmentSize joe_grand_mustache_mayhem_2015.pdf9.47 MB
xnorman has added a photo to the pool:
bzztbomb has added a photo to the pool:
Have you ever wanted to design your own PCB from scratch? Are you curious about the design process and the tools and techniques used by pros and hackers alike? Maybe you have some experience with Eagle PCB and want to try out a free and open source design suite...
Now's the chance to learn KiCad!
"KiCad is an EDA software suite for the creation of professional schematics and printed circuit boards up to 32 copper layers with additional technical layers. KiCad runs on Windows, Linux and Apple OS X and is released under the open-source GNU GPL v2 free of charge."
Here's a few pictures of my latest project: "Power Playground." It's a PMOS/NMOS H-Bridge with FETs that can handle 3 amps or so, plus a SPI current sensor, some switches & a rotary encoder (not stuffed yet), and a 7-segment display, all controlled by a Teensy-3.1 running FreeRTOS.
I made this because I'm always running into battery, power, inductor and transformer issues I don't have any experience with. The idea is to use the H-bridge configuration and current sensors to experiment with moderate-current PWM, motor control, power-line synchronization, battery charging and discharging, etc.
The positive rails of the left & right half-bridges are separated so that I can run an experiment I've been wondering about: can you transfer charge from a battery at one voltage to a battery at a different voltage using an inductor and some smart commutation? I think you can, but you never really know until you do it, right?Schematic72.97 KB PCB198.18 KB
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DorkbotPDX expects attendees to be:
Because we wish to foster an open, diverse, and engaged community, DorkbotPDX does not tolerate discrimination or harassment. We are particularly sensitive to discrimination against and harassment of socially marginalized groups.
Any person in violation of these guidelines may be warned or asked to leave. If you are aware of any behavior in violation of these guidelines, please notify a DorkbotPDX organizer.
We are extremely lucky this week to have THREE art/tech events happening here in Portland featuring artwork from some of our favorite creative coders. Have fun and support your art/tech community by coming out for these events! The first two are part of First Thursday and you can easily walk between them.
Dungeon Hacker at DIODE Gallery Thursday Feb 5 6PM-9PM 514 NW Couch Featuring Dan Cohen, Ryan Johnson, Andy Lunday, and Gabe Shaughnessy http://www.augmentedart.com/hack-the-dungeon/
Electric Fields by Jeremy Rotsztain at UPFOR Gallery Thursday Feb 5 6PM-8PM - 929 NW Flanders http://www.upforgallery.com/future/
ByteMe 4.0 at AFRU Gallery Friday Feb 6 6PM-11PM - 534 SE Oak St. Featuring Church of Robotron, Libby White, John Brown, Ben Purdy, and more! http://www.afrugallery.com/event/byte-me-4-0/
A few of us worked on the Church of Robotron install for ByteMe, so here's a far too large flier for it!AttachmentSize byteMe_poster_04.1.png470.59 KB