10/28/15 - Added most of the 3D print files. Still need to design better gears and leg sections.

10/13/15 ver.8 of my navigation code is working well, let him walk around my kitchen for over 30 minutes, never crashed and even would go around an obstacle. Still need to code for the rear sensor.. 

10/11/15 - added new video - Navigation still needs work...

I just have to do things different.... Inspired by fhareide's work on the Sphero Strandbeest, I have started my version, of course, different. I printed most of the parts in Hatchbox Glow PLA on my Pangu i3 Prusa.
  For starters, I have no Sphero (yet), so I am going to make this propelled with gear motors, also, I'll be making it able to turn (I hope). The big difference is that I am doing this at 50% size, sort of, except that I am making many of the major leg parts at 200% width, so it will have a wider but shorter footprint. Some .stl's I used came from Thingverse, like the leg triangles, and a couple of the gears, but printed at 50% X and Y but 200% Z axis. The connecting links were printed at 50% X and Y but 100% Z axis, and I use only 1 set per leg section. I designed my own frame pieces in SketchUp, and use no bearings.... 'cause I'm cheap. I used my lathe to make the long driveshaft's out of 12.5mm aluminum rod, as I didn't think I could 3d print ones that would be straight enough.

M3 rods hold the contraption together, when I redesign, I'll go with M4 so its a bit more stable.

Overall size is 33cm by 23 cm



It glows very earily....


Propeller Quickstart and a L298 motor controller mounted.

Now workinng on Ultrasonic Senor "head".... servo mounted..

2 UV LED's and 2 Ping Ultrasonic sensors in my head.... 


The wire mess....

the tyranny of wires...

How he glows...

Powering LEDs and Switching them While Protecting my Microcontroller

BDK6 helped me out with this circuit, and then I made a board for controlling the many LED's
Here is the basic circuit, one for each pin used for controlling LED's

I made this 5 channel board using 2N4401 NPN Transistors that are good for 600 mah

For the outboard UV LEDs, I 3D printed a two layer part for holding the LEDs, I used the threaded rods that the legs pivot on to carry the power out to the LEDs

Look ma, no wires!

Added UV LED's on the outboard ends... power is thru the threaded rods...
Testing UV and 3 color LEDs.... UV LED's giving a "heartbeat" on the top back......
First Autonomous test
Glowstrand Lives!

Printing description to come....


Submitted by CKRadmin_fh on Wed, 2015-09-23 09:26

CKRadmin_fh's picture

That is so cool! Love your motor mount! :)

Submitted by Roxanna77 on Wed, 2015-09-23 13:06

Roxanna77's picture

will use 90 degree gear motors and smaller nicer gears.... and less parts!!!!!!!

Submitted by JeffRo on Sat, 2015-09-26 10:48

JeffRo's picture

As always you have done a great job on this. What are your plans for a computer and controller.

Submitted by Roxanna77 on Sun, 2015-09-27 13:58

Roxanna77's picture

and for control, as it is so slow, I think a motor controller may be overkill. It only makes 10 steps per minute. Seriously considering some relays and a very simple 1 step encoder. But then again, I may change my mind....
Along with that some Ultrasonics for sensing.

Submitted by cevinius on Mon, 2015-09-28 09:29

cevinius's picture

Looks fantastic, Rox!

Submitted by JeffRo on Wed, 2015-09-30 06:00

JeffRo's picture

You continue to Amaze me. Given a problem and you will solve it. Great to see that it now is able to move around and turn. You have done an awesome job on this...

Submitted by ggallant on Wed, 2015-09-30 11:34

ggallant's picture

Almost looks like it was planned from the beginning.

Submitted by fhareide on Wed, 2015-09-30 16:14

fhareide's picture
I love the movement of that thing. Really nice! So jealous that your strandbeest can turn! More video, more video! :)
Submitted by cevinius on Sun, 2015-10-11 06:32

cevinius's picture
Looks very cool with the head.