This is a wonderful project, and I'd love to build one of these.
I've had a little trouble with the design files. I downloaded them and tried to send them to Ponoko to have the parts laser cut, but Ponoko choked on an error. I want to open them and fix the problem, but can't open these SVG files in illustrator. I wonder if you might have any thoughts on the design files?
Sorry to hear you had some problems with the SVG files. Ponoko can be finicky about how they want the files prepared. I'm adding a version of the pattern file all set-up for Ponoko's process. I tested it on their system and seems to work, but let me know if you have any other problems!
I'm having Ponoko laser cut the pattern for me. I'll include here the cost breakdown from Ponoko.
2D laser cutting ponokodatamonsterpattern_0.125in_24x12.eps Acrylic 3.0 mm P3 - 384.0 mm x 790.0 mm 1
Here is the price for having Ponoko cut this in birch plywood (recommended)
2D laser cutting ponokodatamonsterpattern_0.125in_24x12.eps Plywood 3.2 mm 24x12 - 291.0 mm x 596.0 mm 1
Here is a cost breakdown with links to the parts where they were purchases:
Qty Parts List Purchase Link Price each Shipping Total 2 Parallax standard servo (180 degrees) http://www.ebay.com/itm/261339779711 3.8 . 7.61 1 Power HD Mini Servo HD-1711MG http://www.amazon.com/HD-1711MG-High-Speed-BB-Servo/dp/B00CBTXVJK/ref=lh_ni_t?ie=UTF8&psc=1&smid=ATVPDKIKX0DER 14.99 . 14.99 2 Power HD Micro Servo HD-1600A http://www.amazon.com/HD-1600A-High-Speed-Coreless-Servo/dp/B00CBTXUZA/ref=sr_1_1?ie=UTF8&qid=1391016216&sr=8-1&keywords=HD-1600A+servo 12.76 . 25.52 1 Intel Galileo http://www.amazon.com/Intel-Galileo1-DDR2-1066-Motherboard/dp/B00GGM6KJQ/ref=sr_1_2?ie=UTF8&qid=1391019033&sr=8-2&keywords=intel+galileo 59.99 . 59.99 3 Infrared Proximity Sensor Long Ranges Sharp GP2Y0A02YK0F 20-150CM With Cable http://www.ebay.com/itm/Infrared-Proximity-Sensor-Long-Ranges-Sharp-GP2Y0A02YK0F-20-150CM-With-Cable-/380739069651? 8.99 . 26.97 . . . . . . 1 2D laser cutting ponokodatamonsterpattern_0.125in_24x12.eps Plywood 3.2 mm 24x12 - 291.0 mm x 596.0 mm http://www.ponoko.com/make 38.13 12.72 50.85 . . . . . $185.93
I'm also making a Data Monster and very glad this updated file is here. I had the same problems with Ponoko.
Why is wood recommended over acrylic?
Acrylic should work fine, but hasn't been tested yet.
I built the first Data Monsters out of wood becasue I had some on hand, and I find wood to be a bit more forgiving when prototyping the fit of tabs/slots. Also, you can just use Elmers' glue!
There's a chance that in acrylic, the tabs might fit a little tighter/looser, but it might also look really cool in acrylic!
I'm putting together my Data Monster and I notice in the PDF documentation the photos show there is a little green circuit board with Red and Yellow LEDs, and what looks like connections to the various servos. What is this board? I don't see that it is mentioned anywhere in the instructions or parts list.
thanks for the help,
p.s., my parts came from Ponoko and they came out really very nice. I'm glad I went with wood instead of acrylic.
The board shown in the photo is just a soldered version of the simple breadboard circuit. (image attached.)
This board has: -Power and ground from all three IR sensors running to +5v and ground on the Galileo (with a small capacitor across them to dampen any electrical noise.)
-Power and ground for all the servos running off an external 5v power adapter (remember to share the ground with the Ground on Galileo!)
This board also has some optional components
-A "tweet bypass button." We use this to test network triggers when no network is present.
-three status LEDs that you can use to let you know what's happening with your Data Monster.
This image, along with a Fritzing file, can also be found in the "docs" folder in the github repo.
Thanks, Lucas. That does help. The Fritzing file is very clear.
Would it be possible to swap out the IR sensors for some ultrasonic ones?
Aside from any changes to the coding, was the decision to use IR Sensors the same was the wood vs. acrylic or might there be some interference from the servo's on the ultrasonic sensors that is avoided by using the IR ones.
I ask because currently the ultrasonic sensors are around half the price of IR sensors in South Africa.
unfortunately I'm a builder on a small budget :-)
Thanks for any help you can provide.
Awesome! beautiful build!
Ultrasonic sensors should work fine. It's funny, IR was actually more affordable when we were choosing our sensors. Anything that generates an analog signal will work fine, and ultrasonic may eliminate some of the problems we sometimes have near open doors and windows in bright sunlight. If there is electrical noise affecting the signal, you can try adding a small capacitor between the power and ground to your sensor, that step is recomended with the IR sensors as well. Good luck!