Sunday - "My First Robot™"
Well the time has come, this is my first ... OK not first but first posted bot :D
This little dude has been built and rebuilt for 3 times now, it's purpose is to serve as a devel/testing platform for various sensors/ideas I might have.
Almost everything on it is scratch built or scavenged from other stuff, except for the wheels which are borrowed form a Mecano set.
Since I still don't want to buy stuff, I do not have geared motors or gearboxes or servos. So I chose to use a very simple yet effective way of transmitting the power from the motor to the wheels: friction drive.
As you can see the motor is driving the wheel trough friction, and the ratio between the wheel and the pinion is 1:5 (or more I'm just guessing here), this guy is real fast, I will probably have to speed it down.
The battery pack is made out of 6 AAA batteries soldered serially to get 9V, I will most likely replace them with a proper battery holder and accumulators for better efficiency.
Size comparison against a normal sized marker pen.
Below is the programmer which will be used to give Sunday a robot personality.
The programmer is based on the USBASP programmer here: http://letsmakerobots.com/node/19753
The brain of the robot is an ATMega8 from ATMEL, it has all the features we robot folks require: PWM, ADC, TIMERS, lots of IO, ISP, 8K flash .. and it is cheap.