Snaky is built around a powerful ATMEGA88 AVR microcontroller from Atmel, twelve miniature servo-motors and a few other components. On the software side the most CPU intensive section is the PWM generation, as 12 PWM signals are generated with a resolution of 20μs and a quite high pulse refresh rate. To achieve this target an innovative firmware architecture is implemented, managing two PWM channels at a time.
The Sandwhich robot is a cool little robo(line follower robot) that is made from easy to find parts , not to mention cheap, and stuffed together into a plastic sandwich box.
The AVR robot controller (ARC 1.1) was designed as the base controller for a high school Mini-Sumo robot project. The controller is built around the powerful Atmel ATMEGA16 processor with 16kb of memory running at 8 MHz for an 8 mip processing speed (contrast this with a 20 MHz PIC which has a 3-4 mip equivalent speed or an 8mhz HC11 with about 1/2 mip equivalent speed). A 16 MHz crystal is included to allow doubling of the CPU speed. Pin compatible upgrades are available that double the memory.This board can be programmed with a variety of free or comercial tools such as GNU C compiler, BASCOM basic compiler, Atmel Assembler/simulator, CodeVision C, Imagecraft C.
Bipedal Robot able to swing ? yes its true it can swing. These days the limit is the imagination of the creator and his budget because the possibilities are endless
The HEXBOT is constructed from 12 (cheap) model airplane servos. Each leg moves laterally on one servo and vertically on the other. Conveniently, this type of servo runs on 5 volts. These servos need only a specific width pulse to position it. Once it arrives at its target location, it draws very little power (about 10 ma). Power is provided by a set of four AA metal hydride batteries mounted underneath. Neither the servos or the PIC requires highly regulated power.
An earlier version of the hexbot had legs made out of 1/4 inch aluminum square stock with a 90 degree bend. This caused the vertical servos to draw a lot of power just standing still. It could barely walk. The new leg design uses a piece of 1/2 inch aluminum angle stock (see the close-up), and two peices of the 1/4 inch square stock. The parts are joined with #6 screws and those plastic-insert ‘aircraft’ nuts. The nuts are tightened just enough to take up the slop but still allow movement.
