Mini Tracker

RRP:
Price:: $7.95 (including tax)
SKU:: K-MT02
Vendor:
Brand:
Weight:: 0.00 Grams
Rating:: ()
Availability:
Shipping:: Calculated at checkout
Current Stock:
Gift Wrapping:: Options available

Product Description

Lets you find things, using an FM radio to pick up the beeps
This beeping bug can be attached to anything from a glider to a pot-plant and you can track it with an FM radio.
The circuit is very compact and consumes almost no power. It is small enough to be hidden in anything you suspect will be lost or stolen.
By using a mercury switch or grasshopper, the bug can be “primed" for the time when it is moved and you can track it with an FM radio.
A grasshopper is a switch that is ready to go off at any time. A piece of plastic is placed between two switch contacts to keep them apart and connected to cotton thread fixed to the floor. When the object is moved, the cotton pulls the plastic out of the switch and the bug is turned ON.
The Mini Tracker transmits a very short burst of carrier which produces a blank spot on the FM dial - commonly called “silence.” Normally, a lot of background noise called “snow” is picked up by a radio when it is tuned to a frequency between the stations. The change between silence and snow produces a “click” or “beep” and this is the noise produced by the project. No actual “beep-tone” is produced - just a change in signal quality. The carrier (or silence) is emitted about twice a second.

Includes all parts, solder, and batteries.

instructions:
http://www.talkingelectronics.com/Projects/MiniTracker/MiniTracker.html