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As my first microcontroller robot, I have made a two-wheeled robot with bumper switches and edge-detction (because I have death-causing cliffs in my house). The next step is to install a switch to turn on a sucking fan, although I'll have to add an additional power supply in this case, other wise the poor thing will only run for a short time before dying. It uses a picaxe18X to poll the bumper switches and the IR detectors, then signal to a 74AC240 octal inverter chip which drives the motors. Both ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/vaccum-bug