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Modular Burglar Alarm – Circuit Schematic
Modular Burglar Alarm
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-h...
Hijack Alarm – Circuit Schematic
Hijack Alarm
The first circuit was designed for the situation where a hijacker forces the driver from the vehicle. If a door is opened while the ignition is switched on - th...
Shed/Garage Alarm – Circuit Schematic
Shed/Garage Alarm
This is a simple single-zone burglar alarm circuit. Its features include automatic Exit and Entry delays. It`s designed to be used with the usual types of norma...
Car alarm circuit – Circuit Schematic
Car alarm circuit
A car alarm in its simplest form, needs to be nothing but one or more sensors connected to some sort of siren. The very simplest alarm would have a switch on th...
Mains surge suppression – Circuit Schematic
Mains surge suppression
The following circuit is a schematic of mains surge suppressor circuit manufactured by StrG¶mfors and sold undel model name "Ahstrom Transienttisuoja 23 386". ...
Vibration SensorCircuit Sensor – Circuit Schematic
Vibration SensorCircuit Sensor
Vibration Sensor or Piezoelectric Vibration Sensor Circuit Diagram. It generates a loud beep when somebody tries to break the door or window. The alarm stops au...
Timely Beeper – Circuit Schematic
Timely Beeper
Fix this circuit in the switch board that provides power to the loads such as Water heater, Electric Iron etc to remind you that the load is switched on. LED bl...
Simple Door Alarm Project – Circuit Schematic
Simple Door Alarm Project
Simple Burglar Alarm / Door Alarm Circuit Diagram. You can use this Simple project to protect the door or Window. It gives a loud beep and switch on the room li...
Personal Alarm – Circuit Schematic
Personal Alarm
Personal Alarm Circuit Diagram. If you feel threatened or need an urgent support in a crowd, use this alarm to catch the attention of others ...
Locker Guard Locker Security Alarm Circuit Anti Theft – Circuit Schematic
Locker Guard Locker Security Alarm Circuit Anti Theft
Locker Guard Circuit Diagram. This tiny circuit can protect your Locker or Almirah from a burglary. If the locker opens in the armed state, the circuit generate...
Electronic Circuit Breaker – Circuit Schematic
Electronic Circuit Breaker
Electronic Circuit Breaker. This circuit can sense the overload condition and breaks the power if the load increases above the set point. It is an ideal circuit...
Secured room access system – Circuit Schematic
Secured room access system
Security is a prime concern in our day-to-day life. And access control system forms a vital link in a security chain. The microcontroller-based digital lock pre...
Digital Code Lock – Circuit Schematic
Digital Code Lock
Digital Code Lock with efficient hacking prevention from Brute Force etc. The basic user lock is of 5 Digits and Master Lock is of 10 digits so its not easy bu...
IC 555 Light Alarm – Circuit Schematic
IC 555 Light 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...
Electronic Lock – Circuit Schematic
Electronic Lock
Digital IC, Electronic Lock Here is an electronic code lock, which can be used as a door latch or key for ignition, etc. Operation is fairly tricky and there li...
Door Knob alarm – Circuit Schematic
Door Knob alarm
Digital IC, Door Knob alarm Here is circuit if you want an alarm to be sounded when somebody touches some thing. If any body touches say, the door handle, buzze...
Police Siren – Circuit Schematic
Police Siren
The first IC (left) is wired to work around 1Hz. The 47uF capacitor is charged and discharged periodically and the voltage across it gradually increases and dec...
Surveillance Transmitter Detector – Circuit Schematic
Surveillance Transmitter Detector
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Electronics Telephone Talking Security and other sensors and detectors circuits – Circuit Schematic
Electronics Telephone Talking Security and other sensors and detectors circuits
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Theft preventer alarm – Circuit Schematic
Theft preventer alarm
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 goe...