Alarm systems

iButton DS1990A Lock

This electronic lock can be used with any type of iButtons you may already have, since the only thing needed is the internal serial number, that’s different for every iButton. The command used to read the serial number is the same for all iButtons. The iButton family code that goes with every iButton, can be anything and is calculated as part of the whole serial number. We must also notice that DS1990A series iButtons are the cheapest. This electronic lock designed to work stand-alone and it’s easy to construct. What the user sees (outside of the door for example) is a iButton socket and a led. ..
Source: http://www.electronics-lab.com/projects/sensors/001/index.html

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Wireless Bug detector

This fairly simple circuit makes it possible to place such a wall as a conduit to locate. It is a conduit for power, no water or gas-seeker. The only requirement is that there is tension on the line. The antenna in the table can consist of a simple piece of copper wire. The correct adjustment is done through R7, in order to prevent the buzzer and LEDs still light up even though there is no leadership in the area. ..
Source: http://www.circuitsonline.net/schakelingen/113/meten-en-testen/leidingzoeker.html

Car alarm systems circuit

The car is a vehicle that is important, very useful. It must be good protection. If I lost it a lot. I recommend identity theft protection for cars, there are several circuits to see it.

Car Alarm Systems May 20, 2011 … Posts Tagged ‘car alarm systems‘ … Posted in alarm home system, alarmsystems, Automotive, Electronic Control, Electronic products | …

Car Alarm Circuit Apr 4, 2011 … When car thieves are scoping out prospective targets, sometimes all it takes is the appearance of an alarm system to deter them… and its …

Burglar alarm systems 1 day ago … Car Burglar Alarm timer delay using NE556 Car Burglar Alarm timer alarm system circuit , model to economize. This circuit convenients for to …

Bulldog keyless entry system for cars The unit was easy to test and install and has a range of about 100 feet. For basic testing, temporarily connect the power and ground wires and listen to internal relay clicks …..

Car Boot Lamp Warning by ICM7556 On many cars, the boot light will not go out until the lid is properly closed. It is all too easy when unloading the car, to leave the lid ajar. If you are unlucky and the car remains unused for some time, ……

Speed Alarm For Cars In normal suburban driving you pass through so many different speed zones that it can be a nuisance having to switch speed settings. The speed display can also be a distraction. This circuit eliminates the display and the need for speed selection…….

Electronic car horn by NE556 An LM556 dual oscillator/timer, U1, configured as a two-tone oscillator drives U2, a dual 4-watt amplifier. One of the oscillators, pins 1 to 6, contained in U1 produces the upper frequency signal ……

Car Burglar Alarm system with radio wave signal When steal open automobile door relay K1 and K2 work make have voltage 12V give radio transmitter and origin sound part for mix radio waves steal will deaf anything sound. ….

Car Burglar Alarm timer delay using NE556 Car Burglar Alarm timer alarm system circuit , model to economize. This circuit convenients for to set up in an automobile. usually switch at set up keep with automobile door will the circuit closes. ….

Car Alarm Simulator by LM324 When car thieves are scoping out prospective targets, sometimes all it takes is the appearance of an alarm system to deter them… and its certainly a heck of a lot cheaper than the real thing! With this nifty kit you ……