FlameOut Test 3

[leenstl]

On this one I needed a timer and also built a circuit to trigger the fan using the onboard LED port. The linefollowing code got me to the pad near the candle, then the timer went off and I made it sweep back and forth then spin around. It then followed the line again until one more timer went off and I turned the motor off.

[pryns]

wow, that's good! hey i'm working on a project w/ the 3pi and part of it requires line following with gaps and avoiding obstacles. Would you mind sharing how you did this with your 3pi, as far as programming and hardware connection???

[leenstl]

Yes, this robot was the fastest one in the competition. The 9V battery has two purposes: it provides power to the fan without running down the batteries used for the robot's motion, and it balances the weight of the fan. These robots are so light that even a small fan on the front throws off the balance, so it worked out well to use the external 9V battery as both power and ballast.

[karandex]

did u came first ? what 9 v battery is doing there?