Electronic dog repellent project
The electronic dog repellent circuit diagram below is a high output ultrasonic transmitter which is primarily intended to act as a dog and cat repeller, wh....
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 ...
Dual Tone Single IC Siren
This circuit is a double tone Police sound and Single tone old ambulance sound. This circuit is usually installed on a on battery powered cars, motorcycles, ....
Doorbell Memory
If you`re expecting an important visitor but you just have to step out for a moment, an electronic doorbell memory can come in handy so you can see whether some...
Door ajar alarm circuit
Ever accidentally left your front door ajar and had a pet escape? Here is a smart solution to this problem. The circuit is fairly simple but a great exampl....
Door Intercom
Door intercom is very useful for home security. If you receive a door knock or door bell/alarm, you can push this intercom knob and ask the guest? to identify....
Detect ringing signal tone with light and sound
The detect ringing signal tone circuit with light and sound.It is easy to use and good quality, Do not enter the power supply. Which as Detect ringing signal....
Circuit Diagram 6 zone alarm independent
Here is 6 zone alarm independent circuit. this circuit suitable for a small office or home environment, it can also be adapted to use a combination lock or keyp...
Car Anti-Theft Wireless Alarm
This alarm circuit is an anti- theft wireless alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF FM radio-controlled, FM tra...
British Police Car Siren circuit diagram
The 555 on the right is wired as an alarm sound generator and the second 555 timer on the left is a 1 Hz astable multivibrator. The output of the left timer is ...
Battery Powered Burglar Alarm
This is a single zone alarm - with independently adjustable Exit, Entry and Siren Cut-Off timers. It will accommodate the usual types of normally-closed input d...
Audio-Operated Room Monitor Circuit
The circuit is aimed to create a monitoring and surveillance scheme for a remote location to function as a room monitor or baby alarm with the use of an a....
Alarm System for Entrance/Exit Gate
The circuit employs the functions of reed switches to produce a gate alarm that is powered by a universal AC/DC power supply Oscillator ....
5 Zone Alarm Circuit
We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of a...
12V/1.5A Residential Alarm
The following alarm circuit is designed with features which maybe suited for residential and commercial alarm system applications.this residential alarm circuit...
Security alarm
This is Security alarm. If somebody disconnected the wire loop The speaker will generate a sound. I have used a circuit for my land. Then when a robber enter fo...
CD800/830 Warning Circuitry Schematic Diagram
...
Ultrasonic Surveillance Bug circuit
Sorry, it seems that the file you`re attempting to access no longer exists! The file may have been renamed or removed from the archive. Please use the navigatio...
Door Lock Wiring
3-wire door locks can be either positive (diagram below), or negative. There is either a constant ground or positive wire that makes contact with either the loc...
latest Wailing Alarm Siren circuit Schematic with explanation
Browse » home » alarm » circuit » explanation » latest » schematic » siren » wailing » with » latest Wailing Alarm Siren circuit Schematic with explan...