Panic Alarm Circuit
Imagine the Panic situation in the Midnight when an intruder tries to break into the house. This Alarm will help you with its loud Police siren to abort th....
Motorcycle Alarm Series
This circuit is designed to create an early warning alarm system for any form of theft that are important to the owners of a motorcycle or bicycle. This alarm s...
Motion Sensor Switch for alarm light or water sprinkler
The Motion Sensor Switch circuit is a motion sensor controlled automatic water sprinkler but you can easily add an alarm/light function too. Before beginni....
Mobile Bug Detector
This handy, pocket-size mobile transmission detector can sense the presence of an activated mobile phone from a distance of one-and-a-half metres. So it can be ...
Mains Remote-Alert Circuit Using BC547 Transistor
The following circuit shows about Mains Remote-Alert Circuit Diagram. Features: simple circuitry, the transmitted signal is conveyed into the ....
Magnetic Reed Switch Alarm
This circuit is made to be an alarm, both for home and handbags. If it is installed for home it will placed on door or windows, and if it is installed for bags....
Light Dark Detector Alarm by IC 555
Today we come to see the circuit detects the light by have a voice warn. When meet the light or be become dark depend on using S1 ( follow the circuit )...
Light Alarm (Sun Up Alarm)
IC 555, Light Alarm (Sun Up Alarm) , This circuit designed to sound a loud alarm at the break of the dawn especially for those wh cannot wake up even with an al...
Invisible Infrared Alarm Circuit
This circuit uses Invisible Infrared light to detect the movement of people through the door. A short beep will be generated when the infrared beam breaks...
Infrared intrusion barrier
Here is the circuit diagram of an infrared intrusion detector. Whenever a trespasser cuts the invisible infrared beam an alarm sound will be raised. The arrange...
Infrared alarm barrier circuit
This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light wh...
Infrared Intruder Alarm
circuit Infrared Intruder Alarm This the circuit warns the trespasser infrared system or Infrared Intruder Alarm circuit that interesting. By when there is a....
Two-Zone Burglar Alarm
This two-zone alarm has automatic exit, entry and siren cut-off timers. It was developed for the Beginner`s Guide To Cmos Timers. So it has a particularly detai...
High Voltage Stun Gun
Can be used agains ferocious animals or attackers, BUT REMEMBER, this device may be illegal in your state...
An Expandable Transistor Based Burglar Alarm
This transistor based alarm features automatic Exit and Entry delays - together with a timed Bell Cut-off and system Reset. Along with the Exit/Entry zone - the...
A Cmos 4060 Burglar Alarm
This is a single zone alarm - with automatic exit, entry and siren cut-off timers. It will accommodate all the usual types of normally-closed input devices - su...
High And Low Voltage Cut Off With Time Delay
The power line fluctuations and cut-offs cause damages to electrical appliances connected to the line. It is more serious in the case of domestic appliances lik...
General Purpose Alarm Circuit for Resistive Sensor
When the resistance value of a temperature, light, pressure,? or any other resistive sensors? Rs drops below a certain point? (adjusted by a preset....
Gate Alarm Circuit
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Four-Digit Keypad-Operated Switch
Speaker relay delay controlling circuit for audio amplidier...