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After finishing my sumobot I was really excited to build another robot so I started brainstorming. I finally decided I wanted to try and make a balancing robot sort of like a segway only a lot simpler. Now the problem is I didn't have any super fancy sensors like accelerometers or gyroscopes so I had to find a way to know if it was balanced with what I had lying around. What I ended up using was 2 super bright LEDs and a LDR (light dependent resistor) to "see" how far the floor was ...
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/circus-bot