BEAM robots are microprocessor-less machines, invented by Mark Tilden, long ago. Maybe you've seen them on the big bad web or made one yourself. This is a little idea i like to share with all robotteers out there.
Distance measurement. Nice when your little bot has a microcontroller. But my BEAM has only a nervous network... Okay Baldrick, time for a cunning plan!
This little circuit (just one TTL ic does the job) compares the measured pulse with a (user adjusted) reference. A...