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The older I get, the smaller my cubicle gets. In fact, I don't even have a cubicle now. But my boss used to walk in undetected and catch ...
You can read the package for yourself. It has about 6 different random "tunes." But, the key item is the little RF remote button that comes with it.
Obviously it turns on a little light (LED) when motion is detected, and the room is dark. (Hmmmmm, I wonder if I could...)
Well, I labeled everything. The photocell (not shown, but trust me, it's there) is to prevent the light (LED) from coming on during the daytime, and therefore prolongs ...
First, you see that PIR motion detector. PIR means "Passive infra-red." Some people call it a "Pyro infra-red." I don't know why. Regardless, we wont hack that. We ...
The photocell, such as you can buy at Radio Shack, has a resistance of about 50k ohms with no light exposure, and about 5k ohms or less when ...
There's a button, which means somewhere there two pins, that when close-circuited, causes the whoopee cushion to do it's thing. The pins are fairly obvious, so I didn't ...
It's not really that tricky if you know a little about electronics, but the deal is that you need to use the trigger signal to activate the system. ...
This pic is one way to conceal everything. Note - by using a micro-controller, the number of variations on this instructable are unlimited. You can place the speaker ...
Here's another boss detector based on the same concept. Also, somebody wanted a video, so I'll put up a video for this soon. The detector for this one ...
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