Hardware Hacking Projects for Geeks

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Chapter 9, How to Build a Cubicle Intrusion Detection System

Hardware Assembly Instructions

I recommend using the BasicStamp2 SuperCarrier board, which has space

for a BasicStamp2 controller (as well as a prototyping space for additional

electronics). I used this board to save some time when I built my cube intru-

sion system, but you can also build the project on a blank printed circuit

board (PCB). The schematic diagrams at the end of this chapter show all

the components you’ll need.

Radio Shack makes an entry alert product that includes all the optics and

infrared light transmission/detection electronics. This product may be

substituted for the laser and photo-detector we’ll be installing in this hack.

The main advantages of using the Radio Shack box are that its optics are

prealigned and that you won’t have to assemble this part of the system.

You will spend a little more money, however; the entry alert costs more

than $60.

The laser module I used is a small component you can buy at Radio Shack.

If you want to use a pen-style laser pointer, you will need to devise your

own mounting system to hold it in place. DigiKey’s laser diode module

costs about the same as an inexpensive laser pointer pen. I chose the

DigiKey module as it is smaller and easier to work with.

The following instructions apply whether you choose to build everythin