Circuit Lake

Electronic Project and Circuit Collection

Security System

NFC Secure Data Storage, AVR ATmega1284

January 12, 2013 By: admin Category: AVR, Miscellaneous, Security System No Comments →

This project implements a secure form of storage for sensitive information such as passwords or identification numbers. It is built based on AVR ATmega1284 and PN532 NFC Shield from Adafruit. The project is modeled after Shamir’s secret sharing algorithm. It allows user to distribute information regarding the secret key among several agents. In this way, […]

Ultrasonic Security System

June 29, 2012 By: admin Category: AVR, Microcontroller, Security System No Comments →

This portable security system is built based on Atmega644 microcontroller. It can detect intruders based on their physical presence. The system uses URM37v3.2 ultrasonic sensor which is connected to MCU through rs232 serial communication. To rotate sensor for wide coverage range, the system is equipped with Parallax servomotor. For user interface, there are LCD and […]

M16C-Based Access Control System

June 11, 2012 By: admin Category: Microcontroller, Project, Renesas, Security System No Comments →

The goal of project is to build M16C powered access control system that could be used as a stand alone locking solution for remote installations or locations where cost of installation was a major constraint. The security system solution consists of an industry standard proximity card reader interfaced to an M16C62P microcontroller. The locking mechanism […]

Optical Photoelectric Beam Sensor: Imaging Silicon Security

March 04, 2012 By: admin Category: Microcontroller, Project, Renesas, Security System, Sensor No Comments →

This project is a simple Renesas M32C/84 microcontroller-based Optical PhotoElectric Beam sensor. It could be used for various applications such as security sensor, optical switch counter, electronic lever trip alarm, etc. This project tends to do something different from the usual use of optical navigation sensor for movement detection. It will use the image capturing […]