Surveillance & Security / Spy

These devices are intended to be used for legal security & surveillance purposes. These kits will allow you to listen in on a conversation, detect motion, disguise your voice with the 'voice changer' etc.. The applications for which these devices can be used for are endless.

	Product Name	Brief Description
$14.95	Alarm Module	The loudest peizo alarm you will find (108 to 11dB output @ 1 meter). The kit includes a resonant cavity mounting case which is molded plastic, 2" x 3-1/4" x 1-1/4", plus mounting ears....
$12.95	Electronic Combination Lock Electronic Kits	This really is an excellent introduction to security devices. Set your own four digit code; any wrong key-in sequence resets the lock; correct sequence activates the relay (up to 240VAC contacts). A 9...
$17.95	FM Telephone Transmitter	Miniature transmitter attaches in series to your telephone line, transmits the conversation 200 yards and more to an FM receiver. Tunable to a clear spot in the FM band of your radio. Completely paras...
$17.95	FM Transmitter and FM Radio Transmitters, 3 Volt FM Transmitter	The most powerful circuit we've seen that operates on such low voltage (just two AA cells). A range of 100 meters can be expected and, given a good antenna and FM receiver, 500 meters can be expected....
$19.95	High Power FM Transmitter	A powerful little circuit with surprisingly good audio quality. Can transmit up to 1/2 mile in open spaces. This is one of the most powerful FM transmitters that you can legally purchase. An electret ...
$22.95	High Quality 9 Volt FM Transmitter Kit	The most powerful circuit we've seen that operates on such low voltage (just two AA cells). A range of 100 meters can be expected and, given a good antenna and FM receiver, 500 meters can be expected....
$12.95	Home Car Alarm Security System Electronic Kit	This circuit is an alarm for the home, car and a lot more. It employs a magnet and reed switch to trigger the circuit. An intergral piezo sounder produces the alarm sound (100dB). There is also a rela...
$21.95	Infra Red Motion Movement Detector	This is an excellent security device, sees infra red heat of intruder in field of view. This is a recent design for a PIR detector; should not be underestimated. Rather than the usual opamps-amps and ...
$18.95	Intercom Two Station Hardwired Bug	Two units employ LM386 IC's in each station. These need to be connected using a pair of wires (about 22 or 20 gauge solid wire). You could power the remote from the base if you run four wires. Each st...
$17.95	Motion Detector Movement Detector Components	A bit different from other kits. We supply the three basic components for you to make your own movement detector. Included is a PCB mounted fresnel lens, a PIR movement sensor and the latest movement ...
$22.95	Motion Detector Ultrasonic Movement Detector	The circuit uses a matched pair of 40 Khz transducer elements to detect movement up to 22 feet away. You may add a relay (not included) to switch higher voltage loads. The unit switches a LED for move...
$19.95	Motion Detector	This super sensor detector sounds an alarm if someone approaches the unit. Adds safety to your home or office. Learn the basics of motion detector technology. Uses pyroelectric infrared sensor.
$12.95	Phone Recorder Switch Low Voltage	This circuit is intended to switch "on" a miniature tape recorder when the telephone is used. It will switch some of the smallest units that operate on voltages as low as 1.5 volts, which ma...
$19.95	Sound Activated FM Transmitter	Sound turns on the transmitter, which operates in the FM radio band. A neat way to catch a thief in another room or garage. The volume of sound needed to trigger the circuit is adjustable. The two sta...
$12.95	Sound Activated Switch for Tape Recorder Electronic Kit	May be adjusted to turn on your tape recorder via its REMOTE plug. Has feed back and delay circuit for robust operation. Very sensitive; proven circuit. Needs 6 Volt supply.
$14.95	Voice Changer Electronic Kit	This really is an excellent introduction to security devices. Set your own four digit code; any wrong key-in sequence resets the lock; correct sequence activates the relay (up to 240VAC contacts). A 9...