Let's Make Robots!

How to calculate servo strength && my micro arm

Do what I say, not what I do...

I have told a lot of folks that it is very hard/impossible to build an arm using micro servos. As the arm gets longer and the weight of each servo along the arm is added, the base servos can't keep up. Well, I don't believe myself. Now that I have discovered the wonder of Plastruct, and the lightness thereof, I am going to make a stab at this one.

CTC CNC Step 2 (Ordered Parts)

Yup, I'm gunna do it. I am building a CNC.

Oh, where do I start? --Seriously, where do I start?

Revised algorithm of choice

In the last two days I have reworked the algorithm of choice completely. The code is now much shorter and a great number of actions can be easily added.  I have listed the code sketch below.

Theo Jansen style robot leg: prototype #10: forget about brass!

Getting closer and closer. Today I needed to clear my head. I really were dreading mass producing my legs with all those brass pivots. During a nice walk in the sun, I figured I would try 10 mm beech smooth dowel rod.

[This photo links to my Flickr set with many more details.]




Robot Mesh Network

Hi there!

I haven't been on LMR in a long time... here's a video of my robot mesh network working. It's been a while in development. ;)

Planning to make a tutorial for it, and I will post it here, eventually. Woohoo!

Skip ahead to the 6:30 mark to avoid the boring debugging (yay for unedited videos!)

The embedded video isn't working for me, so here it is: http://youtu.be/KSGt83BzX74


(Admin edit, video embedded)

Stan Winston has a School

Anyone who has an interest in Special Effects knows who Stan Winston is.  For those who don't he is one of the pioneers of special effects and creature construction. Think  the Terminator , Aliens and you start to know who he is.


Using the Arduino PID Library for precise position control of X and Y axis on RepScrap printer

I've updated the test code I'm using to manage my X and Y axis DC motor / linear encoder closed loop controller.

Swarm AI beginnings (XMOS Competition)

Last Update: 13/10/09 XK1 first look pictures.

My XK1 arrived this morning via Japan post. Being so close to Hong Kong I might be the first :P But they were sent out on the 9th so those people waiting on one should go check your post box!


Laser Distancing Probe using WiiMote - Brought to you by Rare Swiss Cow Productions

Following on from a post here "LoMoR Blog"

I have at long last started work on a Laser Distancing Probe using a WiiMote.

Basically i have equiped two Servos with simple Lasers and strapped it to a WiiMote.

I can alter the angle of the two laser beams (they can be fixed at one angle .....but where is the fun in that)

errrr - i also worked out that you actually only need one Laser (but again two is more fun)

Weather station project, the beginning

I've been thinking about making a weather station for a while. My goal is to have it running when I go for a two week trip at the end of the year so I can check how cold it is back here in Finland :-) To put it simply, the idea is this (the usual weather station stuff I think):

The "Lassiter" laser LIDAR Ranging Gadget (Wiimote/Propeller)

Introducing the "Lassiter" , an inexpensive laser LIDAR Ranging Gadget (Wiimote/Propeller based)

I have been troubled for a while Re:- Laser experiment It required a Bluetoth connection to a pc for it to work.....

..... now i have removed this "MiddleMan", all can be done with a simple parallax propeller system ....YaY

What you see here is my first successful setup :-

SI1120 Sensor working

Developed the code some more to determine which side and how far an object is. The green LEDs signify whether or not either side detects an object. The yellow LEDs signify which side the object is. Lastly the red LED indicates of the object is really close.



Arduino Nano on PCB

As I wrote in Chopstick Junior 1.0 (there you can see it in the robot) here comes the part with the Arduino Nano on a PCB.

Why I did this?

Well, it's just a try to use the Arduino Nano for other robots too. This gives me the chance to remove the MC and put it in another robot or just upgrade this one with a new Nano. But the most important is that I can connect all the servos I need directly to the board without any solering or using male-to-female cables.

Tracked Telepresence Robot

A friend of mine (Dimos) from another site (www.GRobot.gr) started building a tracked robot that would be operated remotely.