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A Servo-based 4-legged Walker

Step 6Brains!

Brains!
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  • more walker 00046.jpg
  • walker construction 00049_2.jpg
The brainboard is pretty darn simple, so you're gonna have to pardon my sketchy circuit diagram.

Beacuse it uses servos, there's no need for complicated motor drivers or what-have-you. Simply hook up +3.6 volts and ground (straight from the battery) to run the motors, and hit them with a pulse-width modulated signal from the microcontroller to tell them where to go.

(See the wikipedia servo page if you're new to using servomotors.)

I cut up a piece of drilled blank pcb stuff, and super-glued headers onto it. Two 3-pin headers for the servos, one 2-pin header for the battery, one 5-pin header for my AVR programmer (which I should make an instructable for someday), and the 28-pin socket for the ATMega 8 chip.

Once all the sockets and headers were glued on, I soldered them up. Most of the wiring is on the underside of the board. It's really just a few wires.

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7 comments
Nov 12, 2010. 7:20 PMpokeroz says:
Is this The right setup for the brains
Jan 31, 2009. 2:29 PMiw28 says:
how do I make the ic the chip ore the brain to the walker
Jan 28, 2009. 12:39 PMiw28 says:
hey i just want to ask to how to make the brain to the 2 motor walker
Dec 28, 2007. 12:55 PM619rey says:
WHAT IS A GROUND BUS AND A +BUS???????
Oct 5, 2008. 3:23 AMDerin says:
the ground bus is a bus that travels on the ground,just joking read real explanation below The + bus carries the power and is similar to the positive of a battery. The ground bus is the exact opposite
Jan 9, 2008. 6:55 PMknive05 says:
can i use pic16f84a as a microcontroller please help me!!!!!!!!!
Feb 27, 2008. 9:13 AMemilk says:
that one probaby will need an external micro controller clock kristall added.
diffrent programmer and stuff.
you could probably use a pic12f* for this project it only used 2 pins ?
12f costs about 2$ for one of the 8 legged ones. the authors code wont work with pic you will be forced to do your own pic ASM
Dec 27, 2007. 7:51 PM619rey says:
also if u could re-draw the design
Dec 27, 2007. 7:48 PM619rey says:
could u add a picture of the under side of the brain

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Author:The Real Elliot