Circuit Diagram Centre

Home » Security

Tampilkan postingan dengan label Security. Tampilkan semua postingan

Security System Switcher

An audio signal can be used as a form of input to control any security system. For example, an automatic security camera can be configured t...

CHA 05.46 Add Comment Lights, Security Edit

Midnight Security Light

Most thefts happen after midnight hours when people enter the second phase of sleep called ‘paradoxical’ sleep. Here is an energy-saving cir...

CHA 01.47 Add Comment Security Edit

Little Door Guard

If some intruder tries to open the door of your house, this circuit sounds an alarm to alert you against the attempted intrusion. The circui...

CHA 04.06 Add Comment Security Edit

Intelligent Electronic Lock

This intelligent electronic lock circuit is built using transistors only. To open this electronic lock, one has to press tactile switches S1...

CHA 06.52 Add Comment Alarm, Automotive, Security Edit

Simple Motorbike Alarm

This simple to build alarm can be fitted in bikes to protect them from being stolen. The tiny circuit can be hidden anywhere, without any co...

CHA 06.45 Add Comment Security Edit

Simple Security Monitor

A remote listening circuit. The area to be monitored is connected via a cable and allows remote audio listening. Starting from the right han...

CHA 06.42 Add Comment Security Edit

Security Alarm

Thwart any attempt of burglary in your house using this alarm circuit. When someone opens the door of your room, it sounds an alarm intermit...

CHA 07.30 Add Comment Security Edit

Powerful Security Siren

This circuit was requested by several correspondents. Its purpose was to obtain more power than the siren circuit already available on this ...

CHA 08.38 Add Comment Security Edit

Two-Button Digital Lock

This very simple circuit of two button digital lock. Now here’s a digital lock unlike any other, as it has only two buttons instead of the ...

CHA 08.34 Add Comment Security Edit

Electronic Security System

This reliable and easy-to-operate electronic security system can be used in banks, factories, commercial establishments, houses, etc. The sy...

CHA 08.02 Add Comment Security Edit

Simple Security Door Electronic Key

It is a relatively simple circuit of electronic lock of safety with code of 7 digits. It should is given attention in the time that will be ...

CHA 00.43 Add Comment Security Edit

Low-Cost Digital Code Lock

Many digital code lock circuits have been published in this magazine. In those circuits a set of switches (conforming to code) are pressed o...

CHA 08.23 Add Comment Alarm, Automotive, Security Edit

Car Anti-Theft Wireless Alarm

This FM radio-controlled anti-theft alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF, FM transmitter i...

CHA 11.59 Add Comment Alarm, Security, Sensors Edit

Pyro Electric Fire Alarm

Here is an ultra-sensitive fire sensor that exploits the direct piezoelectric property of an ordinary piezo element to detect fire. The lead...

CHA 11.19 Add Comment Security Edit

Safety Guard

This is a simple circuit of Safety Guard. Protect your home appliances from voltage spikes with this simple time delay circuit. Whenever pow...

CHA 11.06 Add Comment Security Edit

Luggage Security System

This is a simple circuit of Luggage Security System. While traveling by a train or bus, we generally lock our luggage using a chain-and-lock...

CHA 11.45 Add Comment Security Edit

Anti-Theft Security For Car Audios

This small circuit, based on popular CMOS NAND chip CD4093, can be effectively used for protecting your expensive car audio system against t...

CHA 12.39 Add Comment Security Edit

Secret Lock

This secret lock, unlike a conventional code lock, gives away no hints to the unwanted visitor as to its existence: there are no buttons, sw...

CHA 12.48 Add Comment Security Edit

Electronic Code Lock

Nowadays, electronic code locks are usually based on microcontrollers. However, if you like your electronics discrete, you will enjoy the ba...

CHA 23.56 Add Comment Security Edit

Simple Electronic Code Lock

The circuit diagram of a simple electronic code lock is shown in figure. A 9-digit code number is used to operate the code lock.When power s...