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Last Updated
03/31/2019
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Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION. |
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INTRUSION ALARM sa MOTION DETECTOR sa TOUCH ALARM x BURGLAR ALARM xx ALARM & SIREN xx SECURITY SYSTEM A look at home security systems that make a noise when triggered. Cyber Alert. A talking intruder alert. Voice synthesizer circuit talks about any impending break-in, thus discouraging the criminal. The concept can also be applied to talking clocks, talking toys, talking doorbell, etc. Est. cost: $80. A photonic door and window intrusion alarm circuit. Experimenting with Coleco's Adam computer. How to connect an external speaker and amplifier. How to use Adam as an intruder alarm via the joysticks. Circuit for a home alarm system that can handle both normally-open and normally-closed switches. Est. cost: Under $10. Low-cost, solid-state alarm system utilizes normally closed circuits with any convenient 12 v.d.c. sounding device. Includes a battery back-up circuit for the a.c. line supply. List of X-10 modules and controllers to make an effective intruder-alarm. Suggested wiring for a burglar alarm system (using either the wireless X-10 Powerhouse system or burglar interface module) that is also capable of activating other X-10 modules (connected to an audio system, telephone dialer, etc.) whenever the security system is tripped. Wire-free security. What is available in radio frequency (RF) security systems. Tips on selection and installation. Alarm screens. How window screens can be hooked into any residential alarm or home automation system so that exterior windows can be open and still have perimeter alarm protection. Battling burglaries. Advice on selecting and installing an electronic security system. Includes tips on understanding the specifications for passive infrared detectors. How to arm the X-10 DS7000 security system automatically using a modified wireless remote. Security systems to install yourself. Eight different systems are compared. Tips on selection and installation. Phony burglar alarm consists only of a battery-powered imitation alarm-status display with red and green LEDs. Est cost: $20. Build a smoke security alarm. Let your smoke detector double as a security alarm which includes door exit and entrance time delays. Super burglar chaser. This accessory for any alarm circuit creates brilliant flashes of white light and a loud, irritating sound from a metal horn buzzer. Est. cost: $19 (kit). Ultrasonic burglar alarm can also be used as a proximity detector or a fire alarm. Works up to 20 feet. This alarm circuit handles both normally-open and normally-closed switches. Power supplied by 6-volt lantern battery. Est. cost: $5. Improving the security of a hard-wired security system by hiding a known resistance in the loop. Phone-line monitor. A cut telephone line will trigger your home security system. Est. cost: $70 (kit). Schematic for a sensitive intrusion alarm. Light-sensitive burglar alarm and fire alarm can be triggered by the glare of a lighted match. Solid-state electronic intrusion alarm uses two different detection circuits. Alarm sounds when circuit is either shorted or broken. Circuit for photoelectric beam burglar alarm. Burglar alarm. A portable or permanent unit using reed switches. Est. cost: $6. Simple two-transistor time delay circuit sensitive enough to be used in a burglar alarm, door opener, baby monitor, etc. Est. cost: $10. Easy-to-build proximity sensor adds to the detection ability of your existing burglar alarm. Use with any system that uses a normally closed sensor circuit. Protects any metal object that can be isolated from earth ground. How to wire doors and windows and how to install foil on glass when wiring your own burglar alarm system. Basic control module for burglar and fire alarm system lets you monitor as many door, window, pressure or fire detectors (switches) as you will ever need. Uses two very inexpensive integrated circuits costing less than $2. How to modify your burglar alarm to make it tamperproof. Includes a silent testing system, removal of vulnerable wires and battery to a better location, reinforcing the bell (gong) box, and installing additiional tamper switches, or moving them to better locations. Burglar-proof your home. A guide to alarm systems and security devices. How to install a burglar alarm system yourself. How to make a burglar alarm system for less than $50. System has a loud 10" alarm bell, door and window trippers, a 6-volt battery power source and a key switch for activating the system from outside. A look at the various burglar alarm systems available for the home. A look at the new, small, battery-powered burglar alarms and how to select the one right for you. Wireless home burglar alarm system. Build and assemble your own system which incorporates a new method of RF remote sensing that overcomes limitations of some commercial systems. Budget burglar alarm features include a key switch, instant/delay switch, alarm memory, LED indicators, pre-alarm sounder, trickle charger, automatic reset, etc. Home and car alarm will handle both normally-open and normally closed switches. A relay controls almost any warning device (bell, siren, etc.) and sounds for 5 minutes before shutting itself off. Alarm circuit is battery powered. Est. cost: $7. Tips on installing burglar-alarm foil on windows. Portable, key-operated burglar alarm can be attached to almost anything, at any angle, and is fully self-contained. A home-made "motion detector" switch is the heart of the unit. Schematic diagram for an infrared transmitter to be incorporated into a burglar alarm system. Uses an ordinary flashlight. Electronic combination lock/alarm control. Est. cost: $45. A no-frills closed-loop, hard-wired burglar alarm circuit. Build a smoke security alarm. Adapt your smoke detector to double as a security alarm. Burglar alarm circuit detects intrusions through a series loop of normally-closed switches. Simple burglar-alarm circuit is connected in a closed-loop to detect unauthorized entry. How to install a burglar-alarm system in your home. A look at perimeter-protection and interior-detection systems. All about microwave burglar alarms. Sophisticated security sensors. An overview of the various types of sensors (audio discriminators, foil, magnetic switches, microwaves, passive infrared detectors, and ultrasonics) and suitable applications. Professional advice on installing a home alarm system. Includes tips on concealing alarm wires. Troubleshooting false alarms in burglar-alarm systems. Best burglar alarm brains. Advice on selecting and installing alarm system control panels. Smart new DIY security systems. A comparison of new homeowner-installed system options versus professional security systems. How to make home-alarm systems fail-safe. Tips on how burglars get around alarm systems. Passive-infrared detectors. How they work and tips on choosing these intrusion alarm sensors. A laser burglar alarm you can build. Uses Metrologic Instrument model ML-310 laser available assembled or in kit form. Use mirrors to direct a beam of laser light all around the perimeter of an area you wish to protect. How to install a combination radio/intercom/burglar alarm system. Est. cost: $250. A common sense guide to burglar and fire alarms. Tips on selecting a system for your home. Traveler's burglar alarm. Spring-loaded clothespin with aluminum foil on the jaws is connected to a battery and a bell to make a simple alarm for use on a motel door. How to install a total alarm system in your house. Wire all windows and doors. Alarm for woman's purse will sound off if the handle of the purse is not held for about 30 seconds. Master circuit for a home alarm system that will handle both normally open and normally closed switches. There is a 30 second delay for turning the system on and off. Est. cost: Under $10. Totally passive intruder alarm measures the reflected light from any constant illumination source as it reflected off a black surface. Should the light level go up, an alarm is sounded. Est. cost: Under $9. Diagram of an alarm circuit for protecting doors and windows and featuring an outdoor alarm bell and master shutoff. LEDs indicate which door or window was breached. An experimental security alarm. The system is battery-powered and can identify which of up to 8 sensors (switches) has been triggered. Circuit for a versatile security alarm controller. System uses "area-of-value" concept and can be adapted to protect a home or car with no modification of the basic circuit. A 10-channel wireless home security system with a transmit/receive range of 150 feet. Est. cost: $70 receiver. $18 per transmitter. A personal security alarm. Battery-powered circuit sounds a buzzer when it detects intrusions for both inward- and outward-opening doors. Build a hard-wired home security alarm system. Includes an adjustable exit and entrance timer, a built-in loop test circuit, an optional 12-volt triggered output and a set of external relay contacts. A look at burglar alarm systems a homeowner can install. How to install a wired burglar alarm system. Security measures. A buyer's guide to alarm systems and advice on what works best for old houses. Discusses both perimeter and interior hard-wired systems, wireless alarms and window bars and grilles. Burglar alarm uses ultrasonic sound waves which trigger the alarm when waves are disturbed. Portable intrusion alarm emits a raucous, honking noise if tipped over. Est. cost: $2. Intercom doubles as a burglar or fire alarm. Solid-state photocell alarm system uses a beam of light around the perimeter of a room to detect intruders. Alarm system can protect your whole house from fire or burglars. Estimated cost of alarm mechanism: $15 plus cost of switches and housewide wiring. Professional type burglar alarm uses switches on doors and windows and conductive tape on glass. Est. cost: $40 up. "Foolproof" burglar alarm circuit. Circuit for use in make-break intrusion alarm. Self-powered solid-state intruder/fire alarm has features of a commercial system. Infrared intrusion alarm uses a tone-modulated beam and has standby battery power. Est. cost: $24. Electronic security systems. Protect your home with one of these commercial alarms. Low-cost apartment burglar alarm is self powered and features an adjustable time delay. Uses sliding metal sensors to cover the single door and one or two windows that are ususally vulnerable in an upstairs apartment. Circuit for a burglar alarm which uses sensors in parallel. Unit is powered by a battery. Fail safe modification is also shown. Circuit for a combination fire and burglar alarm. Two electronic systems to protect you and your property that you can build. (1) An infrared intrusion alarm will protect up to 50 feet between transmitter and receiver. Has a built in circuit to avoid being fooled by other IR sources. (2) A portable battery-powered alarm is triggered whenever someone touches a doorknob. The alarm simply hangs on the inside doorknob. Circuits for missing-pulse detectors and slot switches use 555 and 556 ICs. Such circuits may be found in intrusion alarms and adjustable-duration event timers. Circuit for an alarm switch to protect a tool box or other applicatons. Circuit for a simple burglar alarm. A new, effective anti-burglary system. Wireless theft-prevention system sounds an alarm before a burglar enters your house. Est. cost: $200. Burglar alarm circuit is built around a 555 oscillator/timer configured for monostable operation. Works with normally-open switches. Servicing security systems. Learn how to track down even the most elusive problems and end false alarms in hard-wired (perimeter) alarm systems. Automated entry alarm circuit features a sensor that detects changes in ambient light and/or motion. Instrument alarm circuit utilizes a tilt switch and a buzzer to detect unauthorized movement of expensive electronic test equipment. Versatile Code Alarm features separate adjustable enter and exit delays and automatic alarm reset. Use a 1-digit code to arm and 4-digit code (or a key) to disarm. Includes a tamper circuit. Suitable for automobile, home, boat, etc. Est. cost: $30. Burglar alarm circuit is triggered by any sensing device that closes its contacts when activated. Small, simple burglar alarm circuit drives a loud buzzer when either of its two zones are triggered. Alarm circuit modification causes an LED to blink until the broken loop is reestablished. Alarm-control circuit provides an entry delay, exit delay, and latching action. Alarm circuit will alert you when someone opens any door or window that you wish to monitor. Simple circuit called a delay-off relay timer. A charged capacitor keeps a relay latched. This can provide an exit delay for an alarm system. Alarm circuits. (1) Silent alarm remembers a breech. A removable LED is used to read-out the alarm status. (2) Closed loop circuit uses a string of series-connected normally-closed switches. (3) Parallel-loop circuit. (4) Combination series/parallel circuit. (5) High-power driver circuit. (6) Multi-loop parallel circuit. Alarm/sounder circuits. (1) Closed-loop detection circuit with a delay feature. (2) Circuit with a 555 oscillator/timer IC that serves both alarm-trigger and entry-delay functions. (3) Low-level sounder won't warn off intruder in another location. (4) Dual-tone sounder. (5) Alternate sensor uses light to detect an intruder. More intruder-detector circuits. (1) Exit delay. (2) Light-dependent sensor. (3) Bridging touch-plate sensor. (4) Single-plate touch sensor. Simple intrusion-indicator circuits use LED's, resistor and battery. Alarm actuator circuit which also protects the wiring to the sensors. Motion-detecting alarm circuits. (1) Add a buzzer to a passive-infrared exterior light that sounds when the light is activated. (2) Changes in ambient light are used to latch a variety of DC loads. (3) Infrared transmitter and receiver to monitor a passageway. Build a full-featured commercial-quality burglar-alarm system to protect your home. This microprocessor-controlled system features eight individual protection zones, adjustable entry/exit delays, panic switches, X-10 compatibility, etc. Est. cost: $150 (kit). Alarm circuit contains some excellent features, including a panic switch and adjustable siren. An improved version of an April 1991 circuit. Sentinel. Build this early-warning addition to your existing telephone-dependent home alarm system. This device monitors the telephone line and sounds an alarm should the line go dead. Phone-A-Larm. A unique device which will raise a telephone receiver and dial a preset number. The phone will be allowed to ring three times and then the connection is broken by replacing the receiver. The same cycle is repeated every 60 seconds. Useful as a burglar alarm using existing telephone lines. Est. cost: $50. How to install an electronic fire-theft system for the house. Installation uses a $130 kit. New ways to keep thieves out of your home. A review of various alarm systems available. Design and install your own burglar alarm system. Troubleshooting a home alarm system. Electric eye can serve as burglar alarm and automatic doorbell. Est. cost: $10. How to protect your valuables from burglary. Review of several inexpensive alarm systems. Electronic burglar alarm system sounds whenever the circuit is broken or shorted. A variety of switches and detection devices may be included in the same circuit. Powered by a 1.5 volt battery and a 6-volt battery. Small, portable, battery-powered intrusion alarm goes off if if is knocked over by a door opening against it. How electronics can guard your home. Various syles of switches, plus the control box to form a home alarm system. Campground intrusion alarm. Portable unit can protect your campsite by surrounding it with easily broken 32-gauge copper wire. Master home security "dualarm" monitors 10 sensors and indicates the sensor and type of signal (intruder or fire) by means of illuminated panel lights. How to construct a laser alarm system to protect your entire house. Uses a laser from Edmund Scientific and a photoelectric eye from Radio Shack in conjunction with standard car or bicycle mirrors. Easy-to-install wireless security systems. What is available and tips on their installation. Build this electronic security system. Features test light, exit time delay, accessory control, entrance time delay, day-night circuit, automatic alarm turn-off, stand-by power and provision for fire sensors and panic button. Est. cost: $65. Build autodialer and cassette interface. Pulses recorded on tape will dial a selected phone number and then play a pre-recorded message. Use it as part of a fire alarm or burglar alarm system. Burglar alarm switches made easy. Make inexpensive magnetic intruder switches by encasing tiny magnetic reed switches in plastic housings from ball point pens. Build this electronic security alarm that features both open- and closed-loop detector wiring. Powered by a 12-volt lantern battery. CMOS integrated circuit assures a long battery life by turning off alarm after a predetermined period from 1 to 15 minutes. Est. cost: $30. Burglar alarm system monitors switches on doors and windows. Has built in time delay to allow homeowner to turn off the device. Circuit sounds an alarm and can be attached to an automatic dialer. Entryway monitor. An electronic "watchdog" circuit or annunciator can operate either in audible or silent mode to tell you if anyone has entered your home. Build this phony burglar alarm. Electronic "scarecrow" makes your house appear to be protected by a sophisticated alarm system. This dummy "alarm-status display" flashes red and green LED's. Est. cost: $20. Electronic security systems. A historical review of alarm systems and a look at the current state of the art. How to install a professional-quality home security system yourself. Looks at both wired and wireless intruder systems designed to protect all openings. Build a wireless security system that monitors an area using invisible infrared beam and beeps a hand-held buzzer when a problem is detected. Programmable phasor property guard. Scare criminals away with an unbearable ear-piercing sound. A high-pressure ultrasonic sound is triggered when an unauthorized intrusion is detected. Home-security cookbook. Part 1. An introduction to modern home-security alarm systems. Typical circuits for fire, burglar and panic alarms. Placement of sensors and controls also covered. Home-security cookbook. Part 2. Sirens and various types of "fault-indicator" alarms. Simple battery backup can be used to power a control circuit for an alarm system. Build your own Cyclops, a light intensity monitor that can be used as an intrusion detector or as part of an electronic rifle range. Printed circuit board template included. Results of a test of fourteen do-it-yourself burglar alarm systems. Simple door burglar alarm system that doubles as a doorbell. Use either battery or house current as the power source. Simple measures for better home security. Includes instructions for building an intrusion alarm. Protect your home by installing an alarm system. Tips on selecting the system and installing the switches and wiring. Install your own security system with do-it-yourself components. How to install a wireless home security system. | |||||||||
Copyright © by Norman Lathrop Enterprises. All Rights Reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means (electronic, mechanical, print photocopying, recording or otherwise) without the prior expressed permission of Norman Lathrop Enterprises, except as permitted by law. |
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