This particular lab is centered on the prospect of utilizing special kinds of sensors such as an Phototransistor to detect certain kinds of light with a particularly long wavelength of radiation, making them naked to the human eye.
Either way! So this circuit takes the input from the IR and uses it the same way we've used the other sensors. Using what the previous Serial Port lab has taught us, we can now see the exact values being picked up from the Phototransistor when we put an Infrared LED (it does exactly what it sounds like) next to it in the circuit. Note the values on the right.
Let's just test the validity of this sensor by checking the values when we pull out the IR LED.
Just as predicted! The values have dropped, showing that the sensor is working and our circuit is valid!
The next step would be to take the above circuit and make it so that it would be put to use without it being plugged into a breadboard. Luckily Prof. Denny was nice enough to help us out by putting up a diagram of what that might look like (copied from board on left). I tried to imagine it in components and the right version is what came of it.
After tons of messing up, I finally got a terribly soldered version of it ready to go!
It aint pretty, but damn if it aint portable!
And best of all! Our values are in the right margins for it to work as expected!
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