A Java implementation of persistent red-black trees open sourced

Posted on 24 July 201124 July 2011 by tom.larkworthy

Make search go mega fast! O(log(n)) inserts and deletes on ordered lists, but with the twist that the original list before modification remains intact! Implemented by using path-copying as per “Making Data Structures Persistent” Driscoll, Sarnak, Sleator and Tarjan. PersistentRedBlackTreeSet This was quite tricky to implement, because you are not allowed parent pointers, so you Read more about A Java implementation of persistent red-black trees open sourced[…]

CNC working again

Posted on 24 July 201124 July 2011 by tom.larkworthy

New Oldham couplings for the Z and Y axis have been fitted. The X axis has not been replaced but it has also never been broken. We have the bits to fit the X axis, we can do it next round of breakages :p Slop and backlash have been greatly reduced, and the machine sounds Read more about CNC working again[…]

Android androids

Posted on 20 July 201120 July 2011 by tom.larkworthy

Meet Arnie Android (rev0) !! Based on a desk toy from Dealextreme he as 2 servo driven arms,a buzzer two flashy eyes and a PIR sensor in the head. Those foolish enough to approach within 10 M of my desk can now be detected ans suitably “processed” by Arnie 😉 http://www.dealextreme.com/p/android-mini-collectible-series-action-figure-doll-android-09-yellow-51733 Designed by yours truly Read more about Android androids[…]

CNC mill conversion update

Posted on 19 July 201119 July 2011 by tom.larkworthy

So the mill has been working nicely since last week, until the ‘temporary’ bodged z-axis coupler gave in. I ordered proper Oldham couplings for all axis last week, but forgot to take them to the lab this evening (doh). However, I took the free time to take apart the machine and gave it a clean Read more about CNC mill conversion update[…]

Talks at the lab on Sunday 17th July

Posted on 12 July 201113 July 2011 by tom.larkworthy

Following the success of last months talks, this month we have a selection of Scotland’s ambitious tech start-ups talking about their areas. Anarkik3D — develops software applications using virtual 3D touch, with a haptic device taking the place of the standard mouse to provide more natural and familiar 3D interactions. Robomotic — develops embedded wireless sensor platforms. Read more about Talks at the lab on Sunday 17th July[…]

Raft Race Report

Posted on 10 July 2011 by peterj

It was Saturday morning, following a late night of raft assembly and a tight fit into the transport the Edinburgh Hacklab raft was at the canal ready for racing. During some pre-race testing there was a capsize with the two occupants going for a swim. We went in the first heat against a very impressive Read more about Raft Race Report[…]

Raft Race Preparations

Posted on 8 July 20118 July 2011 by peterj

A team from Edinburgh Hacklab are taking part in the Edinburgh Canal Festival Raft Race this Saturday (9th July). Preperations have been taking place throught the week including designing the raft and sourcing materials. The raft racing starts at Lemmington Bridge, Union Canal around 12.30pm if you fancy coming to watch. It should be fun whatever happens!

Edinburgh Hacklab documentary

Posted on 5 July 2011 by Al

Earlier this year, Edinburgh film student Kelly Jamieson visited the lab to make a documentary. Now it’s on YouTube for your viewing pleasure. See Aaron’s payphone being investigated! Experience Martin philosophising on hackerspaces! Watch TomH tinker with the CNC! It’s all here in Hacklab: A documentary!