Picture of Simple Bots: Walker
My goal with Walker Bot was to make a 4-legged walking bot that could be made in ten minutes. This bot ultimately took me three hours to make. That said, my goal wasn't to make one in ten minutes, but to make one that could be made in ten minutes. I am pretty confident that now that I know what I am doing, should I need to make a second one, I could do it in ten minutes. At the very least, you will be hard-pressed to make a simpler walking bot than this one. I would consider this project a glowing success.

Step 1: Go get stuff

Picture of Go get stuff
You will need:

(x2) servos modified for direct drive**
(x1) telephone handset
(x1) 4 x AA battery holder
(x1) DPDT lever switch
(x2) CDs
(x2) 6" bolts
(x2) 5" bolts
(x4) bolts
(x4) bolt covers
(x2) thin 1" nut and bolt
(x1) a couple dozen assorted zip ties
(x1) print template (download below)

**Modify your servos for direct drive here
WalkerPrint.eps(342x702) 268 KB
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zeeshan_work4 months ago

if i use dc motor instead of this motor?

it is right to do.

Because when you remove controller from motor it will move continuously and dc motor is also moves continuously.

randofo (author)  zeeshan_work3 months ago

It would have to be a geared DC motor. A DC motor by itself probably won't have enough torque.

misbah258 months ago

i have a 3 pin dpdt lever switch ...is there any way i can use it ???

randofo (author)  misbah253 months ago

Nope. This wont be able to reverse the voltage.

misbah258 months ago

my dpdt lever swich has only 3 pins instead of 6 like yours ? is there any way i can still use it ? im doing this for my school project and im in a hurry....pls reply asap

M.C. Langer made it!11 months ago

I never post the "I made it" of this bot. I love so much this project!



what sets of the dpdt?

hey admin how did u do the servos for direct drive can u explain me properly i can't understand the way wat u said?!

Graut1 year ago
Nice Robot, but I have a question regarding the servos motor.
I have modified it like said in the walkthrough, but my motor goes just one way, it doesn't go forth and back like it should? I haven't used a DPDT switch, because it is damn hard to find, so have just used a regular switch, is this the problem? I can get 2 SPDT switch, so maybe I have to try that...
Thanks in advance
Graut Graut1 year ago
I have now tried the 2 SPDT switches, and gotten the motor to go back and forth...but I have to press the switch every time I want to switch the way the motor goes. In the video the motor goes back and forth without pressing the switch, is that because of the switch I have used or have I done some other thing wrong?
mArtiAnOk2 years ago
does the CD toggles the lever switch?
randofo (author)  mArtiAnOk2 years ago
jvega72 years ago
thank you for join it, now i am motivated for build it..
mahsa arian3 years ago
its so amazing
i follow your great idea. thanks for share it :-)
rohit0074 years ago
awesome man...!!...it really..wrked..nd dat too on my first try..thnx..i ll remeber dis bot....forever !!
hey ! its shivam from delhi and i am also trying to make this one........but i cant find the servo motors as well as the DPDT lever switch........can u tell me from where did you find it?????????
i got one from an old rc toy. hope this helps and goodluck!
You will find servo's on ebay fairly regularly now - but old RC toys are also a good source.
chaitanyak3 years ago
elegant mechanism :)
I'm a bit confused. So because it's a DPDT switch wired to run backwards also, you don't use the switch to turn it off but to reverse the motion? Would the only way to turn it off be to take the batteries out?
randofo (author)  superstatic273 years ago
Yes. The only way to turn it off is to remove the batteries.

The DPDT switch reverses the polarity of the power going to the motor. When the polarity is oriented one way (+ to -) the motor spins in one direction. When it is reversed (- to +) the motor spins in an opposite direction. The bot is basically changing its own motor direction.
mraghib3 years ago
Nice & innovative idea!Can you please tell me can we use toy motors instead of servos as they are expensive! Thank You!
randofo (author)  mraghib3 years ago
Yes. Just get 2 identical geared motors.
mraghib randofo3 years ago
Is a toy motor and gear motor the same? Sorry I'm new to robotics!
SCIENCEPAL3 years ago
Nice work dude! Its pretty cool!
mistu993 years ago
can u reply quickly because i need 4 Wednesday
mistu993 years ago
can i use a motor to replace the servo because in uae i can't find it
jualone3 years ago
very weel
sofsof4 years ago
that is so cooooooooooooooooool
i like it very muuuuuuuuuuuuuuch
Continue giving us more instructables...........
randofo (author)  anubhavtalukdar0074 years ago
Soon. Very soon.
ptrinidad4 years ago
very good man!!!
sajee4 years ago
my servo has 3 wires and how can i convert them into 2 wires like seen in the pictures
robotics_sk4 years ago
hi, does it matter if instead of a standard servo we used a continuos rotation one?
randofo (author)  robotics_sk4 years ago
That should be fine.
robotics_sk4 years ago
how do i print the templates?
randofo (author)  robotics_sk4 years ago
You should be able to open the eps with one of the image viewing programs on your computer. Then, just print it out using a normal computer printer (be careful not to re-size it)
robotics_sk4 years ago
where can we buy the servos motors??
randofo (author)  robotics_sk4 years ago
I'm using Parallax motors. Try:

101nemesis4 years ago
the thing is if we modify the servos for direct drive.
wont it block the handle of the telephone.?
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