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Generative Art Conference GA2006 – Circuit Schematic
Generative Art Conference GA2006
The conception of this project is directed to the study of the environment response due to a human action. Based on that subject, an environment was prepared wi...
Wailing Alarm Siren – Circuit Schematic
Wailing Alarm Siren
IC2 is wired as a low frequency astable with a cycle period of about 6 seconds. The slowly varying ramp waveform at C1 is fed to PNP emitter follower Q1, and is...
Car Alarm wiring diagrams 2 – Circuit Schematic
Car Alarm wiring diagrams 2
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Ringing Phone Light Flasher Circuit – Circuit Schematic
Ringing Phone Light Flasher Circuit
How to connect up some lights so that when the phone rings, they flash. This is very useful in a situation were there is lots of noise and it is impossable to h...
Receiver Battery Low Voltage Alarm Circuit – Circuit Schematic
Receiver Battery Low Voltage Alarm Circuit
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Electronic Siren Circuit – Circuit Schematic
Electronic Siren Circuit
The sound produced imitates the rise and fall of an American police siren. When first switched on the 10u capacitors is discharged and both transistors are off....
Electronic Locker Circuit – Circuit Schematic
Electronic Locker Circuit
This circuit is an Electronic Locker. It is controlled by a switches combination (by a code). There is a switch matrix on the door of the locker. This one is a ...
Cut Phone Line Detector – Circuit Schematic
Cut Phone Line Detector
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Car Alarm Arming Horn Beep Canceller – Circuit Schematic
Car Alarm Arming Horn Beep Canceller
Disconnecting the alarm system from the horn relay will eliminate this, but prevent the horn from sounding in the even of an actual alarm. This circuit serves t...
slave flash trigger circuit – Circuit Schematic
slave flash trigger circuit
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Surveillance Transmitter Detector – Circuit Schematic
Surveillance Transmitter Detector
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Electronic Door Release – Circuit Schematic
Electronic Door Release
This circuit is designed to operate an electrical door-release mechanism - but it will have other applications. Enter the four-digit code of your choice - and t...
Water Level Alarm – Circuit Schematic
Water Level Alarm
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Water Activated Alarm – Circuit Schematic
Water Activated Alarm
It uses a 555 timer wired as an astable oscillator and powered by the emitter current of the BC109C. Under dry conditions, the transistor will have no bias curr...
Multi-Zone Transistor-Based Intruder Alarm – Circuit Schematic
Multi-Zone Transistor-Based Intruder Alarm
This is a simple transistor-based burglar alarm circuit. Its features include automatic Exit and Entry delays - together with a timed Bell cut-off and Reset. It...
Security Monitor – Circuit Schematic
Security Monitor
Use this in your garden and listen for any unusual sounds, or maybe just wildlife noises. If you have a car parked in a remote location, the microphone will als...
Enhanced 4 Digit Alarm Keypad – Circuit Schematic
Enhanced 4 Digit Alarm Keypad
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 termin...
Enhanced 5 Digit Alarm Keypad – Circuit Schematic
Enhanced 5 Digit Alarm Keypad
This switch will suit the Modular Burglar Alarm circuit. However, it also has other applications. The Keypad must be the kind with a common terminal and a separ...
Motorcycle Alarm – Circuit Schematic
Motorcycle Alarm
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Motorcycle Alarm Number 2 – Circuit Schematic
Motorcycle Alarm Number 2
This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wi...