Circuits & Schematics Security - 3
Subsection: "Security"
Including:| Bugs Lie detector |
Search results: 53 Output: 21-30
- How about getting that old Nokia phone out of your drawer and turning it into something freakishly cool? I will not lie to you, you will need a few tools and skills such as soldering/desoldering and making PCBs. Here you can download Sprint-Layout ...23-11-2010
- The Button Code is a system that allows a single button to act as a keypad. The user enters a 4 digit code into the system using button taps. The button can be placed where the public can access it since like a keypad there are many combinations to ...17-11-2010
- D. Mohankumar This motion detector alarm circuit can detect a moving person from a distance of 1 meter. It uses a Dual IR Transmitter-Receiver module HOA1405 . When the sensor detects the reflected IR rays, Alarm will sound for 2 minutes. The ...21-09-2010
- General Description This is a very interesting project with many practical applications in security and alarm systems for homes, shops and cars. It consists of a set of ultrasonic receiver and transmitter which operate at the same frequency. When ...29-06-2010
- Overview The “Simple Wireless Security System” monitors the open/closed state of two (garage) doors. Sensors detect the state of the doors, and a Zigbee wireless transceiver sends the state information to a PC. The PC runs a GUI ...25-06-2010
- Ok, so there are heaps of immobilisers out there but with most of them, if someone has your keys, they have you car. What good is a car alarm with 3+ point immobilisation if someone manages to get the keys and of course the alarm remote. This is a ...12-05-2010
- One LED monitors three levels: 50, 70 85 dB Useful to detect too noisy environments Circuit diagram: Parts: R1 10K 1/4W Resistor R2, R3 22K 1/4W Resistors R4 100K 1/4W Resistor R5, R9, R10 56K 1/4W Resistors R6 5K6 1/4W Resistor R7 560R 1/4W ...05-04-2010
- Vassilis Serasidis This safety-lock circuit use the new Atmel AVR microcontroller series, the ATtiny26 . This micros (and new ATmega8 , ATmega16 etc) are powerful microcontrollers with new features like internal RC calibrated oscillator for 1,2,4 ...31-03-2010
- Andy Collinson Description This is a complete alarm system with 5 independent zones suitable for a small office or home environment. It uses just 3 CMOS IC's and features a timed entry / exit zone, 4 immediate zones and a panic button. There are ...17-03-2010
- Part 1 Part 2 I started the development with the card and the camera connected to and Atmel STK300 board and a Mega128 chip. Developing on a larger chip facilitates development, as you have extra pins, flash and RAM to use for debug. Once I gained ...12-03-2010
