Instructables
Picture of Large Dancing Robot
Build a large dancing robot. This was supposed to be a walking robot, but it more kinda beebopped around.

video on last step.


 
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Step 1: Build a Prototype

Picture of Build a Prototype
First, The _Prototype_:

Before you make a large, high power robot, it's good to make a smaller scale prototype. I made a simple walking robot using

= Brains: PIC16f877A,
= Actuators: two small geared pager motors (http://www.solarbotics.com/products/gm10/)
= Actuator Control: an L293 H-bridge,
= Body: I used one of those thin metal things that cover your unused card slots at the back of your PC.
= Fasteners: Everything was kept together by double sided tape and twist ties and some small screws from an old computer case.

Info on how to use the PIC and the L293 h bridge motor controller are covered in my previous instructables:
PIC: http://www.instructables.com/id/Intro-to-PIC-Microcontrollers/
H-Bridge: http://www.instructables.com/id/EHL7TR9A61ETVPKL4D/

--Notes--:
you can download the code I used (LWalker.bas).
The gears on the motors are important because they add torque (needed for a walking robot since it has lift its own weight).

http://www.youtube.com/watch?v=VyqcOvQ5BhQ


Step 2: Hardware(1): Stuff You'll Need

Picture of Hardware(1): Stuff You'll Need
Now I started building the larger scale version. I used:

= two 24 volt wheelchair motors I had bought a while ago (to make a bot for the battlebots tv show, didn't happen) (from Ebay)
= two victor 883 24volt motor speed controllers (from ebay, originally sold by IFI robotics)
four 12v 5ah batteries (two in series for each motor) (from allelectronics.com)
= two planks of wood stolen from a contruction site
= two 10 foot pieces of EMT electrical conduit (from Lowes)
= a conduit bending tool (Lowes)
= bicycle inner tubes (go to a local bike shop and ask for popped tubes from the trash)
= u bolts, screws, locking nuts, locking washers, a ratchet wrench, hack saw, power drill
= friction feet thingees (you slide them onto table legs for friction) (from a local hardware store)
Nicapizza2 years ago
Hey, i know its been a long time scence this was posted, but what is the song? it sounds a lot like arctic monkeys and i really like it.
vicky6663 years ago
By the way i think this robot walks and it does not dance and i think you should change the name to 'large walking robot' as many people thinking it's a dancing robot, and get confused like i did!!!!!!!!!!!!!!1
calm down!!!!!!!!!!!
andross524 years ago
Did anyone else notice the url?
me! Giggles....
waffleman4 years ago
im sorry but i dont really see how one can be very excited about this? it just shakes around a bit, nothing special........
leevonk (author)  waffleman4 years ago
I agree with the second part of your statement but not the first and third. It is in fact quite special compared to most things that 'just shake around a bit'    :)
robo35 years ago
nice build!!!!!!!!!!!!!
erobot5 years ago
u rocked yar..well i'm interested to design a dancing robo..please help me ofcourse, this protocol will help me up!! thanks and regards eRobot madhu@bvrit.ac.in
nice one i love bro!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Unit0425 years ago
Nice stuff here! I've been thinking about making a walker myself (not quite as big, but still). Looking at your diagram, the 45 degree tilted up end is supposed to be forward, the horizontal motor end is the butt.
The front motor is activated in any given direction, rapidly followed by the rear legs, rotating in the opposite direction. After that, both motors reverse, starting with the front motor.

see:
solarbotics.net
leevonk (author)  Unit0425 years ago
yeah, I know, but I tried it that way and ran into a problem that is specific to larger robots, the metal conduit I was using for the legs couldn't hold up the robot body when the legs were at 45 degree angles, the metal bent and the whole body sagged, so I had to bend them more inwards. Also, when I made a smaller version (first video shown in the instructions) it actually ended up moving in the opositie direction with the 45 degree angle legs at the front. given all of that and the fact that I was trying to build the large version in one long 24 hour session and you see the not so great result.
Unit042 leevonk5 years ago
Mmmm... bummer. Back to wheels! :D
crankola5 years ago
Heyyyy- I remember this! in fact im standing in the background in a red jumpsuit with the rest of COBRA, Idiotarod organizers. I really liked the robot and I thought it was a great interpretation of the "contest". Just sorry you didnt win anything... :( But keep doing this and maybe they will have a "Best animatronic dancer", or best "jiggy terminator" award!!
leevonk (author)  crankola5 years ago
not sure if I'll have time to build another one for this years idiotarod, and I lent out my motors for another project, so we'll see
elixeo6 years ago
Great instructable. Liked the Video but I have to admit I found the girl a bit irritating.
leevonk (author)  elixeo6 years ago
she's a really good friend of mine, she's a lot of fun, I find you irritating.
leevonk (author)  leevonk6 years ago
by the way, how can you like the video while finding her irritating, she's in all but 5 seconds of it! I think that you just like her so much that your brain is confused
The girl in the blue helmet is cute ! Around 59 seconds into the second video I forgot there was even a robot there . Shes hot !
Hi, guys, The robot works! But perhaps the body seems so weigh to move. That's right, the girl is irritating. I can hardly focused on the robot while the girl appears!!!
Clayton H.6 years ago
So this is really just a giant Vibrobot?
theRIAA6 years ago
need more POWER!
No sir , what this needs is more cowbell.....
I GOTTA have more cowbell.
SWV17876 years ago
Honestly the girl in the blue hard-hat was more entertaining than the large dancing robot but it was a cool idea
leevonk (author)  SWV17876 years ago
I agree, the robot needs more spunk, I'm working on it, but that's as good as I could get it at the time. I'm going to try putting all four batteries on one motor to see if that makes a difference, also I have to buy some more emt conduit to bend into some new front legs, i'll put an update video here if it any of that works.
Nice! Especially loved the warning 54 seconds into the movie :P
...Awesome! Looks really hard to make, but it's awesome!