retrointerfacing

- connecting past and future -

Robots in Eindhoven (during STRP)

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During STRP MADlab organizes an exhibition of the robots (amongst others the flatpack walkers and the fireplotter (with wout zweers) in the library of Eindhoven

Written by edwin

March 9th, 2013 at 3:51 pm

Posted in Robotics, expo

Dancing Man at TEDx Amsterdam

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And behind the scenes…

Written by edwin

December 12th, 2012 at 4:13 am

Posted in Robotics, expo

Tagged with

A4 design challenge @ Gogbot2012

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Build a cool reproducible robot out of one A4 size sheet of laser cut material

Objective
In many Fablabs Lasercutters are accesible to anyone with a good idea. This machine is perfect for cutting trough sheet material with high precision. Reason enough to use it for building cool robots! The contest is open for anyone willing to create a design and release it as Creative Commons…
Rules
Use one sheet of material, like 2 mm acrylic glass or 4 mm plywood. It is up to you, but use one single type of material. Keep the budget low, and keep external components and parts to a minimum, reproducibility of your design is key! You are allowed to use any type of controller (MBed, Arduino, NE555, whatever) - but again take note: reproducibility is key.

Criteria
+ many moving parts
+ many actuated parts
+ easy to reproduce
+ autononomy
+ interactive
+ cool design
———————-
- difficult parts
- high costs
- many motors or servo’s
- glue
- rest material
- complex tools

The more actuated and non-actuated degrees of freedom, the better. More activity with less motors is good. Your design should be easy reproducible and have a certain level of autonomy and interaction. Points will be subtracted for use of extra hardware, expensive parts, glue and complex tools. Also full use of your sheet is encouraged, so the amount of rest-material is taken into account.

Laser
Various laser cutters are at your disposal in your vicinity. Saxion students and members of the general public (i.e. everyone) can use the laser cutter at FablabEnschede during public opening hours. bring your design on USB stick, bring your own material and cut away… For UT students there is one option nearby in the SmartXP lab. There are fablabs to visit in every major city in the Netherlands. If you do not want to travel, you can send your design to A4laser.nl and have it cut and shipped back for you!

Submission
Make yourself known to us: join the facebook group or write an email. Submit your design before October 7th 2012. The prizewinner(s) will be selected shortly after that. Submission consists of one A4 PDF / SVG of the design, combined with picture or drawing, bill of materials and description of the end result. Submit to a4designchallenge@e13.nl

Prize
Beer or honor or both (or any beverage of choice accompanying said honor) - also some samples of a kit based on your design - produced by Studio13. We are currently working on more interesting stuff to lure more participants…

F.A.Q.
Why A4?: nice restriction, you can test your design using a normal printer and a piece of cardboard.

Which materials can I use? Most lasers will work with acrylic glass from 2-6 mm. Plywood from 2-5 mm. Metals cannot be cut. Also materials containing PVC cannot be cut due to safety reasons. Furthermore paper, leather, cardboard etc. can be used. Polycarbonate (Lexan) can be cut but gives charred edges.

Can I use scrap material? The problem with using scrap material is that when you use just this gear out of just this type of old DVD player that it is hard for somebody else to find exact that part and reproduce your work. Better to cut the gears from the A4-plate (which was the whole point)

Who owns my work? You do. You always hold the rights as author of your design work. We strongly suggest you to consider to distribute your design under Creative Commons license so it can be used for workshops, experiments and other non-profit causes.

Who will be the judge? to be decided. Peer review is a likely candidate :)

Which design tools can I use? Any tool will do. For cutting you need to supply the design as vector drawing (eps/eps works best). Suggested drawing tool if no other experience: Inkscape

Can I team up with others? Sure, but youʼll have to share the prize.

Written by edwin

September 6th, 2012 at 2:10 am

Dancing Man Finished

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The dancing man is ready to be revealed: the presentation is Friday 7th at the Stadsschouwburg Amsterdam.

See also a report in Bright..

Written by edwin

September 5th, 2012 at 1:29 am

Posted in Uncategorized

Tagged with

HECO victa 200 repair

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Audiophiles, please navigate away from this page. It might make you cringe, hit random bystanders, etc.

victa-200rosewood_1

That having said, some time ago I came into the possession of two simple bookshelf speaker cabinets by HECO, the Victa 200. Unfortunately one mysterious destructive force in my house took the life of one of the tweeters. (this mysterious destructive force has of course nothing to do whatsoever with a button-crazy two year old which happens to live in the same house). Anyway..

I couldn’t find an address selling spares, the original speaker cabinets were quite cheap, but only sold in pairs. The only solution: find some tweeter that roughly matches size and specs of the previous one, and do a replacement.

Being somewhat limited in suppliers, I bought a monacor DT75/8 which has the same cone diameter as the original HECO (only power specs and magnet size are very different)

I used a lot of hot-melt glue, jigsaw and file to make the cabinet useable again. Although the process looks bad and ugly, the sound is much better (compared with no tweeter at all) and even optically you can hardly tell the difference…

defective original tweeter

defective original tweeter

original container plate (plastic!!)

original container plate (plastic!!)

backside of the plate filed and sanded down

backside of the plate filed and sanded down

New tweeter dome

New tweeter dome

hole in need of a jigsaw

hole in need of a jigsaw

pizza box as protection

pizza box as protection

aargh...

aargh...

a lot of hot-melt glue (good brand stuff)

a lot of hot-melt glue (good brand stuff)

end result

end result

Written by edwin

August 21st, 2012 at 1:50 am

Posted in DIY, home improvement, repair

Tagged with

TimeStamp

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Commissioned by Trotec Laser as present for Trodat’s 100 year anniversary: a retro clock shaped like one of Trodat’s modern stamps… The used acrylic was all laser cut of course :)

timestamp

Written by edwin

June 4th, 2012 at 12:23 am

Posted in fabrication, retrointerfaces

Tagged with

This is what I am talking about..

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Now, print your own!

http://www.techrestore.com/2010/02/print-your-own-functional-ipad.shtml

Written by edwin

May 7th, 2012 at 8:48 pm

Posted in Uncategorized