TI-83+ I/O Port Tutorial #7 - Making a Laser Tripwire

https://www.youtube.com/watch?v=rS3W5fHlrTA

In this video we make a laser tripwire using a TI-83+ series graphing calculator. Also, a correction, it's a 10 kOhm not a 300 Ohm I specifically used. Although as I said you will probably have to try a bunch of different resistors anyways depending on your situation so it doesn't matter.