In this article, we are publishing a project which explains different aspects of interfacing a Graphical LCD (GLCD ) with 8051 microcontroller. Nokia 5110 is a 48 x 84 graphic LCD that has an internal controller PCD8544 to control all displays and operations. The Nokia 5110 is interfaced to the microcontroller through a serial bus […]
DIY Automatic plant watering system This project is about a moisture-sensing automatic plant watering system using 8051 microcontroller. The system simply senses the moisture level and switches on the irrigation pump when the moisture is below the set limit. The system switches off the pump when the moisture rises above the set point. The moisture
Heart rate monitor with SMS alert (Using 8051 and GSM module). This project is about a heart rate monitor that senses the heart rate from the finger tip an sends it as a message to a cell pone number. This project is based on an 8051 microcontroller and a GSM module. Heart rate is sensed from
As the world grows to be digitally dependent, even doors can now be designed to be secure and safe. The digital version of the lock and key holds a lot of promising features. The digital door lock is securely placed with passwords. However, this may also attract unethical hackers, therefore, an extra layer of security
PIR sensor based burglar alarm with SMS alert. This project is about a PIR sensor based burglar alarm with SMS alert. The circuit senses the intrusion using a PIR sensor and sends an SMS to to the given mobile number when an intrusion occurs. The number of intrusions taken place is also displayed on an LCD
Humidity sensor using 8051 Â (Hygrometer) This project is about a simple humidity sensor based on 8051 microcontroller. Humidity sensor is also called hygrometer. This circuit can sense relative humidity (RH) Â from 20% to 95% at an accuracy of 5%. The humidity information is displayed on a 16×2 LCD display. A relay is also provided which
RFID Door Access Control System using 8051 In this project, we are going to build an RFID Based Access Control System using 8051 Micro Controller. The same system can be named like RFID based door lock or RFID based access management system. If you have been to big hospitals or companies, you might have seen
Microcontroller Based Programmable Data-cum-Temperature Display. LCD display are most widely used in applications like token display machine in malls, supermarkets, restaurants, cafe-houses etc. The project presented here demonstrates the working through wireless by use of Bluetooth technique. This circuit is designed by Mr. Vivek Kumar Kamboj from Haryana. Circuit and working. This circuit uses microcontroller
This article is divided into two sections Interfacing PIR sensor to 8051 DIY intruder alarm circuit Interfacing PIR sensor to 8051 microcontroller PIR sensors are widely used in motion detecting devices. This article is about interfacing a PIR sensor to 8051 microcontroller. A practical intruder alarm system using PIR sensor and 8051 microcontroller is also
Line follower robot using 8051 Line follower robots were one of the earliest automatic guided robots. They are able to follow a line marked on a contrasting background, usually a black line on a white surface or a white line on a black surface. Usually, the line follower robot works on a closed loop feedback
Object counter using 8051 microcontroller. This article is about a simple object counter/visitor counter using 8051 microcontroller . AT89S51 belonging to the 8051 family is the microcontroller used here. This circuit can count the number of objects passing across a line , number of persons passing through a gate/door and so on. The can be
We all see Police using breathalyzers on drivers to check if they are under the influence of alcohol. Drink & driving is a crime in all countries. But do you know that this machine is easy to make? Here is how to DIY alcohol breathalyzer with 3 digit display output. Alcohol Breathalyzer circuit using 8051
This article is about a simple heart rate monitor using 8051 microcontroller. Like the previous 8051 projects, AT89S51 is the microcontroller used here. The device senses the heart rate from the finger tip using IR reflection method and displays it on a three digit seven segment display in beats per minute. The circuit has an
This article is about interfacing a hex key pad to 8051 microcontroller. A clear knowledge on interfacing hex key pad to 8051 is  very essential  while designing embedded system projects which requires character or numeric input or both. For example projects like digital code lock, numeric calculator etc. Before going to the interfacing in detail,
This article is a compilation of all 8051 based Electronic Projects and Circuits we have developed at CircuitsToday till date. We have one of the biggest collection of 8051 based Projects – which range from very Advanced one’s like Electronic Voting Machine, Heart Rate Monitor, RFID based Access Control (and a lot more) to Medium
Ultrasonic range finder using 8051 . A simple ultrasonic range finder using 8051 microcontroller is presented in this article. This ultrasonic rangefinder can measure distances up to  2.5 meters at an accuracy of 1 centi meter. AT89s51 microcontroller and the ultrasonic transducer module HC-SR04 forms the basis of this circuit. The ultrasonic module sends a
Contactless digital tachometer using 8051. A three digit contact less digital tachometer using 8051 microcontroller which can be used for measuring the revolutions/second of a rotating wheel, disc, shaft or anything like that is introduced in this project. The tachometer  can measure up to a maximum of 255 rev/sec at an accuracy of 1 rev/sec.
DIY Random number generator A Â random number generator using 8051 that displays a random number between 0 & 99 is shown in this article. The circuit itself is very simple and may not find any applications in serious embedded projects and this article is just an illustration. The circuit is based on AT89S51 microcontroller, two
Voltmeter using 8051. A simple 0-5V voltmeter using 8051 is shown in this article. This digital voltmeter has a sensitivity of 200mV which is a bit low but this project is meant for demonstrating how an ADC and seven segment display can be interfaced to 8051 to obtain a digital readout of the input voltage.
ADC (Analog to digital converter) forms a very essential part in many embedded projects and this article is about interfacing an ADC to 8051 embedded controller. ADC 0804 is the ADC used here and before going through the interfacing procedure, we must neatly understand how the ADC 0804 works. ADC 0804. ADC0804 is an 8 bit
Water level controller using 8051. A water level controller using 8051 is shown in this article. A lot of water level controller projects have been published in this website but this is the first one based on a microcontroller. This water level controller monitors the level of the over head tank  and automatically switches on
