Lines and Fire

Our upcoming big challenge is to create a lean, mean, firefighting robot.
...Or a little guy that'll put out a candle for you.

For this challenge, we need not only to detect the flame, but to get our bearings inside a four-room building. For this, we need an flame sensor to find the flame, and a line sensor to  find the "doors" to each room.
An infrared light sensor can be used to find the flame since fire emits so much infrared light.
Little infrared? - no flame.
Lots of infrared? - flame detected.

Just an infrared LDR working with a 10K resistor like in my Hexbug.

The line sensor also uses an infrared sensor, but it also needs an infrared light emitter working with it.  The emitter constantly shoots infrared at the floor, and depending on whether or not there's black electrical tape below, the sensor will receive varying reflection from it.
Lots of infrared? - no line.
Little infrared? - line found.

I added electrical tape around the sides so they emit and receive to and from the floor only.

We were supposed to have this bot up and running, so we can see it stop at a line, then point to the flame when it sees it, but we spent quite a bit of time being confused about the construction and testing of these new sensors. On top of that, the bot that Everette built seemed unwilling to give us a strong drive-train, as we observed during the maze-run last week.

Tomorrow, we plan to start fresh, and transfer everything to my bot.