Instructables
Come see BoB at MAKER FAIRE NYC!


Did you buy an arduino after seeing all the cool instructables and now you tired of just making LEDs blink? Are you envious of all the cool walking robots people are building but don't have the experience or cash for all of those servos and expensive brackets? Here is your solution meet BoB the 4 servo mini biped robot. Bob is both easy to build and very cheap to assemble and yet is loaded with personality and endless expansion capabilities.

So how did BoB come to be?
After wanting and drooling over all the 3d printers(still don't have one) and cool stuff being built. i was offered and opportunity to design a robot and have it printed for me and so bob was born. 

What are future plans for BoB?
First i would like to explain a bit about my school experience. When i was younger i dreaded school in fact the only thing that got me through the day was my tech classes. They made school enjoyable and let me into the robotics hobby i actively participate in today. Using BoB i would like to give back. The first BoB was created due to a very generous offer and since i have made many improvements. But without a printer to test each design they are just untested files. My long term Goal is to make BoB into a cheap and easy to assemble class room activity to help children get their feet wet in the world of robotics, to give those hands-on kids like me something to look forward to, and to give them an introduction to new technology that is making waves and if the future in many fields. so my next goal is to attempt to obtain a printer be it by winning it, building it over a period of time (my funds are very tight i have a child of my own) or raising the money to continue my work.

so are you ready to build?
 
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makesomeso1 month ago

nice robot. i like bob and im gonna make it !!

I personally made my own version with limited parts ( BoB minus the Ping sensor ) it's mostly made of cardboard and held together by duct tape, mostly because i'm 15 and don't have a 3D printer.

INSTRUCTABLE COMING SOON!!!!!!!!!!!!!!!!!!!!
JasonRP8 months ago
Anyone know where I can by the plastic parts for this robot?
k.biagini (author)  JasonRP8 months ago
you can look for a local makerspace...or any of the online print shops..BoB is on shapeways but they charge about $90...you can also look at the 3d printer forums there are members there that help other without printers
k.biagini (author) 10 months ago
thank you all for the support bob got first in the pocket electronics contest i am truly grateful!
Really cool!
k.biagini (author)  emilyvanleemput10 months ago
thank you :)
You're welcome!
gururise10 months ago
Do you have a working head for use with the cheaper HC-SR04 sonar sensor yet?
k.biagini (author)  gururise10 months ago
as seen here http://letsmakerobots.com/node/37383#new
k.biagini (author)  gururise10 months ago
i was told that with a little bit extra sanding, that it fits.
Michael_Bell10 months ago
Cool! I voted for you in the 3d/Epilog Challenges! I don't know how I missed this for >10 days
k.biagini (author)  Michael_Bell10 months ago
thank you very much for the votes!
Alderin10 months ago
Excellent!

I've had 4 of these servos around for months, pondering how to put them to use, and I think I've just found it! Very cute design! With only 4 servos a standard Arduino can do all the positioning with analogWrite(), leaving the digital I/O pins and one analog I/O pin free for other uses! The 'head' won't fit a full-size Arduino, but since I'm going to build the legs from popsicle sticks mine will end up just being a walking Arduino.

So excited to start this build! (Yes, I'll photo-document it!)

Voted!
k.biagini (author)  Alderin10 months ago
the fact that a regular arduino doesnt fit in his head was one down side. but can be remedied by mounting it to his back and running all the connections inside. i did that with my Dagu Micro M and it doesnt affect the center or gravity enough to matter. you idea has given me one and arduino biped shield! thanks for taking the time to look and thank you for the vote!
Alderin k.biagini10 months ago
The "Moteino" would probably fit, and has built-in wireless ability (though not BlueTooth). As for a biped shield, without stacking it would be easy and cool, but not very extensible. Building it stackable would be a challenge. A biped shield plus turret shield or ping shield or IR shield would be very cool.

Stackable... My brain starts on a line of thought with built-in battery pack with separate power feed for the servos, 5dof (2d hip, 1d knee, 2d ankle) legs with a separate MCU doing the servo control to take fewer of the lines from the Arduino, maybe use SPI so that even the lines that are used aren't "used up", preserving the shield stackability. But I hear my "grand plan" alarm buzzing as I type this. :-)
k.biagini (author) 10 months ago
bluetooth stuff came in today look for the bluetooth BoB tutorial later today!
cupcake lover10 months ago
He is so adorable!!!!
k.biagini (author)  cupcake lover10 months ago
thank you
Your welcome! I couldn't find u in the epilogue contest?
k.biagini (author)  cupcake lover10 months ago
if you click vote in the upper right hand corner it will allow you to vote right from there.. thanks for the vote!
Ure welcome
Mizchief10011 months ago
Cool cool! I like the minimalist design. Definitely makes bi-peds less intimidating.
k.biagini (author)  Mizchief10010 months ago
thats what i was trying to achieve a very basic "start here" biped that can evolve into something bigger and better. and not cost an arm and a leg.
JesusGeek10 months ago
Wow, great job!!! Try adding LEDs and arms. Call him Nibob (New Improved Bob)
k.biagini (author)  JesusGeek10 months ago
the mouth holes are for 3 mm leds its just something i haven't gotten around to installing yet. and arms are being considered for the RoB upgrade
k.biagini (author)  k.biagini10 months ago
oh yeah..Thank you very much.
sdcharle11 months ago
Very nice project. I wonder could I get away with giving him a boxy laser cut body. I don't have access to a 3D printer. Yet.
k.biagini (author)  sdcharle10 months ago
yes, a member of lmr had made a laser cut version. I can make basic files. his base plate and feet should be simple...the leg brackets would have to be heated and bent. the head itself would be the parts that will take some work.
Mythbuster42510 months ago
Very interesting, but what Arduino or Raspberry Pi chips are we using? I could not find a list if there is one.
k.biagini (author)  Mythbuster42510 months ago
whatever one you chose. Small arduinos like the pro mini and nano fit in his head bigger ones can mount to the back. The base code I have provided is for arduino. mine uses the Dagu Micro Magician
surya_14310 months ago
Hey i just want to know abt the cost to finish the project
k.biagini (author)  surya_14310 months ago
Im not sure what the parts will cost to print. the servos and an arduino and ping can be had for around $50 plus a battery. i honestly only paid to ship a few gear motors in exchange for the servos i want to say it cost me about $10 to build him. but about $50 should be all you need...even less if you leave out the ping.
k.biagini (author) 10 months ago
BoB's picture was used in the new toy contest banner. thank you instructables and members for the support! new BoB stuff coming soon
k.biagini (author) 11 months ago
thank you all the support i have seen is amazing
brunoip11 months ago
This is awesome, I'll be waiting for the video.
k.biagini (author)  brunoip11 months ago
editing video now. will post shortly.
robo1030211 months ago
coll bot i will definetley vote for u.but just on question any specific reason why u named him BOB.??:)ANYWAYS COOL
k.biagini (author)  robo1030211 months ago
i called him that once and it just stuck, im making an upgrade kit to make him 6dof now and its called RoB.
Ok should be cool I'm going to try and make one
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