Complete Mt. Sac Fire Sensing Vex Robot Challenge

We spent about 5 days using all of the knowledge that we acquired building our Vex robot to compete in the robot challenge on the last day. We had most of the core code done by Tuesday afternoon and were able to optimize on Wednesday and a little Thursday morning. The robot was very consistent and even with the air conditioner vent messing with the flame most of the time, it was about to find it’s way out of the maze, find the flame, move to it, blow it out and then give control to Norman to go and get the ball.I’m going to leave the code for the very end of this post because it’s pretty long.  Scroll down to the bottom to see the video of the robot going through the contest.

Here is the full front view of our robot.

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Part 14 – Building Sensors for your robot

Part 14 had us building a simple circuit to test for flame/heat/fire using a phototransistor. Before building the final phototransistor I put together a test using the breadboard. In addition to the breadboard test, I built a little IR emitter circuit that I would be able to use to test since I knew I was going to use this with my hack-a-toy. Here is my phototransistor test circuit. As well as the circuit reading working displaying values using the Arduino.

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Part 13 – Distance Sensing with Ultrasonic Sensor and Arduino

Part 13 was a variation of some of the work we had done in some of the previous labs. In this lab we got to use a good bit of pre-formatted code to test the operation of an Ultra Sonic or sound wave based sensor. The lab was just getting the sensor to work with some pre-created code. Here is the code I used to test …

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