|
|
Category: Security Circuits / Alarm Circuits This circuit is also crossed to: 555 Timer Circuits Views: 4225 Rank: 0 This circuit utilising a 555 timer IC can be used as an alarm system to prevent the theft of your luggage, burglars breaking into your house etc. The alarms goes ON when a thin wire, usually as thin as a hair is broken. The circuit is straightforward. It uses a 555 IC wired as an astable multivibrator to produce a tone of frequency of about 1kHz which gives out a shrill noise to scare away the burglar. The wire used to set off the alarm can be made of a thin copper wire like SWG 36 or higher. You can even use single strands of copper form a power cable. The circuit operates on a wide range of voltages from 5V to 15V. The speaker and the circuit could be housed inside a tin can with holes drilled on the speaker side for the sound to come out. visit page.  The circuit operates on a wide range of voltages from 5V to 15V. The speaker and the circuit could be housed inside a tin can with holes drilled on the speaker side for the sound to come out. http://electronic-circuits-diagrams.com/alarmsimages/alarmsckt3.shtml
Related circuits ELECTRIC FIELD DISTURBANCE MONITOR This schematic is the power supply and front-end sections of the field monitor that is discussed in more detail at Electric Field Disturbance Monitor. (this link is off-site) The system can detect human and animal motion by the electric fields they disturb. The security system application and program offers a simple demonstration of the BASIC Serial Interface. By adding only a few door and window switches, a transistor, a siren, (see schematic) and a few lines of BASIC program (see program listing) the interface can become a multi-function security... This circuit produces the sound of a beeper like the one in pagers which produces a "beep-beep" sound. Basically the circuit consists of a 555 timer oscillator which is turned ON and OFF periodically. The first IC(left) oscillates at about 1Hz. The second IC is turned ON and OFF by the first IC.... The Keypad must be the kind with a common terminal and a separate connection for each key. On a 12-key pad, look for 13 terminals. The matrix type with 7 terminals will NOT do. The Alarm is set by pressing a single key. Choose the key you want to use and wire it to `E`. Choose the four keys you... A circuit that offers visual indication of fluid level in a vessel, with a switchable audible alarm. Example uses would be to monitor the level of water in a bath or cold storage tank. This circuit emits a beep and/or illuminates a LED when someone touches the door-handle from the outside. The alarm will sound until the circuit will be switched-off. The entire circuit is enclosed in a small plastic or wooden box and should be hanged-up to the door-handle by means of a thick... The article describes the home combustible gas detector. Main motivation for this construction was my 3 years old son who has very positive relationship with the home hardware. Of course, nice buttons on the gas cooker are very interesting for him and he can hear nice hiss of the gas. The first... The Sun-Up Alarm can be used to provide a audible alarm for when the sun comes up or it can be used in a dark area and detect when a light comes on. It can also be used to detect a light beam, headlights etc. The circuit works as follows. The phototransistor is very sensitive to light. (Any...
Articles & Projects
Integrated circuit anti-theft alarm system, wire or different lack of a easy circuit. When the shortage of wires or cords lacking. MOSFET, it's working or has input voltage at pin G and for this reason it has a high current floats in the ...
Build Intelligent Wire Loop Alarm Circuit With IC. Integrated circuit anti-theft alarm system, wire or other lack of a simple circuit. When the lack of wires or cords lacking. MOSFET, it is working or has input voltage at pin G and ...
Modular Burglar Alarm Circuit. In this figure is design circuit for modular burglar alarm circuit. This circuit features automatic Exit and Entry delays and a timed Bell Cut-off. It has provision for both normally-closed and normally-open contacts, and a 24-hour Personal Attack/Tamper zone. This ...
The Basic Alarm Circuit has an automatic Exit/Entry Zone - an Instant Alarm Zone that will accept both normally-closed and normally-open triggering devices - and an "Always On" 24-hour Personal Attack/Tamper Zone. By using the Expansion Modules - you can add as many extra ... and Tamper protectio...
Circuit : Tomaz Lazar - Ljubljana, Slovenia Email : Description: A few months ago, I decided to build a compact, yet effective alarm. My demands were:- simple construction, reliable operation, very small power consumption, and, most of all, ...
Every alarm in the circuit is combined to the buzzer with a sound intensity of 82 dB. There are sensors present in the circuit that can be made of wire loops or close reed switches which operates due to the employed magnetic ...
DIY Driveway Gate Vehicle Detector Cut In Loop Installation
Burglar Alarm Kit - C6280 by Chaney Electronics Kits
Comments
Facebook Comments
Most searched
lm3915
Results: 15 Count: 10842
Automatic battery charger
Results: 960 Count: 9448
12v counter
Results: 965 Count: 8139
signal generator using XR2206
Results: 3108 Count: 7529
multivibrator
Results: 243 Count: 7495
12f629 switch
Results: 1604 Count: 7354
optocoupler
Results: 52 Count: 7113
bcd
Results: 40 Count: 6365 |
Accounts area
Circuits
Audio Filters
Stereo Circuits Ultrasonic Circuits Amplifiers Audio Oscillators Preamplifiers Audio Mixers Equalizers Tone Balance Beeper Buzzer Vacuum Tubes Valves Musical & effects Microphone Circuits
PLL Circuits
UHF circuits VHF Circuits FM radio GPS Circuits Jammer Circuits RF Transmitters RF Receivers RF Amplifiers AM radio Antenna Circuits FM Transmitter Transceiver Circuits
Demodulators
Buffer Circuits Triac Circuits Mosfet Circuits Sequencer 555 Timer Circuits Doorbell Circuits Switching Circuits Remote Control Toy H Bridge Circuit Game Circuits Keypad Circuits
Metal Detector Circuits
Liquid Sensing Circuits Light Sensing Circuits Voltage Detector Circuits Air-Gas Detection Circuits Human Sensing Circuits RF & Radiation Medical Circuits Sensor Circuits Magnetic circuits Optical Sensing Circuits Hall Effect
Varius Circuits
Astable Colpitts Crystal Hartley RF Sine wave Square wave Volt controlled Wein Bridge Monostable Circuits Pierce
Tesla Circuits
Inverter Circuits Free Energy Circuits Chargers AC to DC & DC to DC Solar Cell Circuits Current Limiting Mirco Power Circuits High Voltage Switching Power Supplies
Timer Circuits
Voltmeters Frequency meter Meters Circuits Counters Clock Circuits Checker Circuits Delay Circuits Thermometer Circuits VU Meters
Infrared
Xenon Lighting Light Sensing Laser Led circuits Fluorescent Circuits LCD circuits Light Dimmers
Readout Circuits
Logic Circuits Digital to Analog Display Circuits Analog to Digital Data Logging Data Bus Circuits Decoder Circuits
Voltage to Pulse
Current to Voltage Frequency to Voltage RF Converter Circuits Sine to Square Wave Voltage to Current voltage to frequency Period to Voltage
Video Mixer
Video Wall circuits TV Video Circuits Modulator Camera Circuits Television Photo Flash Video Amplifier
Stepper Motor
Remote Control Servo Circuits Robotics Direction Finder Power Control Relay Circuits Motor Control Circuits
Arduino projects
PIC Microcontroller AVR Microcontroller Programmers 68HC11 Microcontroller 8051 / 8052 MCU Circuits
|
|
Electronic Circuits Schematics Projects
|
|
