All posts in the 'Alarm Projects' Category
Posted on 25 Aug 2008
This is a simple microcontroller driven(PIC16F84) doorbell project with features:
- one second instant pulse output
- one second delayed pulse output
- two minute lighting output
- latching has been triggered indicator
- processor alive indicator
- ignore additional trigger for preset duration.
This ia ana open source project,source code and PCB areย�included.[more]
Posted on 25 Aug 2008
This project is a microcontroller project creating an alarm clock with two alarm times using PIC18F4520.There are 5 buttons: mode, hour, minutes, alarm 1 and alarm 2.The output pins from the PIC18F4520 will be connected to a vibrator to create the motion alarm.[more]
Posted on 25 Aug 2008
The PIC microcontroller is programmed to read the real-time clock using I2C serial communication several times a second and update the display.The PIC performs two other functions; it compares the time against the alarm settings to determine when it should go off and also handles time, date and alarm setting.The design was created using New Wave Concepts’ LiveWire which allows you to simulate the effect of the signals on the components.[more]
Posted on 25 Aug 2008
This is a simple temperature alarm which uses a PIC16C84 microcontroller and a 2-line LCD display. The alarm displays current temperature in both Celsius and Fahrenheit degrees and features a 3-key keypad which allows the user to set independent high and low termperature alarm points. The alarm also records the minimum and maximum temperatures encountered.[more]
Posted on 21 Aug 2008
The PIC microcontroller stores all of the temperature change entries as a table in its EEPROM memory, and keeps track of which is the current entry based upon the time it reads from the RTC. Every five seconds, the RTC is accessed. Then, the current temperature change entry is calculated. And finally, the temperature sensor is updated with the new alarm temperature.[more]