January 2004
Intermediate to advanced
348 pages
13h 33m
English
Content preview from Hardware Hacking Projects for Geeks
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180
Part II: Advanced Hacks, Tools, and Techniques
light, a signal sent to a remote indicator warned me that someone was about
to sneak up behind me. A diagram of my setup is shown in Figure 9-1. This
system can also be built using an infrared beam entry alert, saving you the
time of assembling the laser system.
I also added an LCD to the system to display the number of times my cube
had been entered.
Project Overview
You will first build a small circuit board that holds a microcontroller, photo-
detector, and laser diode. (Or, if you choose to use an off-the-shelf Radio
Shack entry alert system, simply assemble a microcontroller board.) Next,
you will program the controller with a small piece of software and set up
your system.
For this hack, you will need to know how to solder and how to program a
BasicStamp2 controller.
Remote
indicator
Laser/IR
transmitter/
receiver
Mirror
Figure 9-1: Intruder detection system in operation
Project Overview
ch09_cube.indd 180
1/13/2002 4:14:33 PM
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.