Single button code entry for a digital lock using PIC16F628A

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 keep guessers from activation the system. When the correct code is entered a form-C relay is activated (Normally Open and Normally Closed relay contacts). When a ...

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A PIC-Based Temperature Alarm using PIC16C84

Presented 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. System Specifications: The unit is designed to ...

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Dialing Alarm using PIC16F628 Microcontroller

This is the lowest-cost dialing alarm on the market and shows what can be done with a PIC microcontroller. The complete circuit is shown below. You cannot see all the features of this project by looking at the circuit - most of them are contained in the program. So, read on and see what we have included. . . The programming socket is not on the PC board - it has been added for the time when you want to modi ...

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Contactless Digital Tachometer using PIC Microcontroller

Hey friends, I should have posted this project last month itself  but there was some problem with the circuit. [link], author of this project did an exellent job. I have been watching him learning on this website. He came as a total noob but now he is well versed with 8051 and PIC microcontroller. earlier he has submitted Microcontroller Based Home Security System This project is about A Contactless Digital ...

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Keypad scanning and interfacing with PIC16f877 microcontroller

Here I give you very important and simple project on Keypad / keyboard scanning and interfacing with PIC16f877microcontroller . To start big project you need to know small and necessary one first. So we start form basic . In my previous post I write on Scrolling Text on LCD by PIC Microcontroller Displaying text on LCD by interfaced with PIC16F877 microcontroller in 4 bit mode Simple Project on LED blinking ...

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Car Anti theft System Project using Microcontroller PIC16f73

For a while we have been sharing many electronic projects for engineering students and then we found out there was a huge demand for embedded projects, especially PIC microcontroller based projects. After a short break, here is another outstanding one that is not only suitable for electronics engineering but mechanical engineering students too. Now coming to the project topic, as seen from the title it’s re ...

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PIC12F675 Microcontroller Based Security Alarm Circuit

Crime in general is still on the rise, and having a security alarm installed is no longer a perquisite of the wealthy! Here is a simple and compact security alarm system to protect your home/shop and valuables. The circuit is built around a tiny microcontroller chip PIC12F675. Besides, a ready-made Passive Infrared (PIR) module is integrated with the alarm system for reliable human-motion detection. The bui ...

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Home Security System with GSM Using 8051 Microcontroller

Security is a big challenge everywhere because thefts are increasing day by day owing to the unsafe and insecure security systems in homes, commercial complexes and industries. Several conventional technologies are available to keep home properties safe from intruders, but most common smart home security systems work on wireless GSM communication. Such systems provide security from natural, incidental, inte ...

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Dual programmable keypad code lock using PIC18F452

Open electrical doors with your secret code only! Here are the technical specifications: Up to two keypads may be connected to drive both relay outputs. Professional, outdoor or other keypads may be used. Relay outputs are configurable: output voltage +6 to +24VDC (from power input) or simple switch emulation. The small LCD is optional, and can be omitted. Low power operation with internal switching power r ...

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Password controlled sliding door with SMS alert by pic Microcontroller

In today’s world implementation of any expert system with maximum data and networking security becomes a real necessity in home, academic organizations as well as in industrial communities. To provide this security here I give my project on “password controlled sliding door with SMS alert by pic microcontroller”. Project Objective: The proposed system is a chamber, which is closed by a sliding door. A Keypa ...

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