Digital Code Lock using Arduino with LCD Display and User Defined Password

We have published a digital code lock using arduino some weeks before. This one is a little different. The earlier version was based on a defined password, where the user can not change it. Moreover there was no LCD display interfaced with the project to output lock status. This project is a much improved version of the same digital code lock which comes with a user defined password and LCD display. The user will be prompted to set a password at installation. This password inputted at installation will continue to serve the lock until it is changed. The user can…

Read More

The Big List of Arduino Projects and Circuits

In this article, we compile all the best and interesting projects we have developed using Arduino. These days Arduino based projects are used for academic course fulfillment as well. In any case, Arduino is a very interesting platform to build real world projects. List of Arduino Projects 1. Temperature Logger using Arduino – is a very simple project using Arduino and a Temperature sensor IC LM35 from National Semiconductors. The program monitors temperature every 2 seconds and displays temperature on the serial monitor of Arduino IDE. We have developed this project for learning purpose. You can enhance this project by…

Read More

Interfacing gyroscope to arduino

Interfacing gyroscope to arduino uno. This article is about interfacing gyroscope to arduino. Gyroscope is a device used for measuring the angular velocity in the three axes. It works under the concepts of angular momentum and can be used to determine the orientation of an object. Typical applications of gyroscope includes missile guidance, flight control, smart phones, game station joy sticks etc. Mechanical gyroscopes, MEMS gyroscope, optic fiber gyroscope, ring laser gyroscope. Here we deal with the MEMS gyroscope. MEMS is the abbreviation of micro electro mechanical system. The MEMS gyroscope works under the principle of Focault pendulum and has…

Read More

LPG sensor using arduino

LPG sensor using arduino with alarm and cutoff. A simple LPG sensor using arduino is shown in this article. This circuit indicates the amount of LPG in the air. The circuit  sounds an alarm and trips a relay  when the concentration is above a predetermined level. MQ2 is the gas sensor used in this project. MQ2 is an SnO2 based gas sensor which can sense gases like methane, propane, butane, alcohol, smoke, hydrogen etc. Since LPG primarily contains propane and butane, MQ2 sensor can be used for sensing LPG. The figure below shows the schematic and arrangement of an MQ2…

Read More

OhmMeter using Arduino – with Auto Ranging Feature

Auto ranging ohmmeter using arduino. This article is about a simple auto ranging ohmmeter using arduino. The measured resistance is displayed using a 16×2 LCD display. The circuit is sufficiently accurate and uses minimum number of external components possible. Before going into the details of this project, lets have a look at the basic resistance measurement method. Resistance measurement. The figure above shows the circuit diagram of a simple resistance measurement scheme. Rx is the resistance to be measured. R1 is the input resistance. i is the current passing through the loop and 5V is the supply voltage. To find…

Read More

8051 Timers and Counters

In this article, we focus on Timers/Counters of the 8051 micro controller. The 8051 has two counters/timers which can be used either as timer to generate a time delay or as counter to count events happening outside the microcontroller.                       The 8051 has two timers: timer0 and timer1. They can be used either as timers or as counters. Both timers are 16 bits wide. Since the 8051 has an 8-bit architecture, each 16-bit is accessed as two separate registers of low byte and high byte. First we shall discuss about Timer0 registers. Timer0 registers is a 16 bits register and…

Read More

We are on all Social Media – Youtube Facebook Twitter Linkedin and Slideshare

Hello Everyone,  Lets hope a good day for all! We have been live from 2008 till this date serving you all with fun electronic circuits and projects. In this long span of 6 years, we have come up with a handful of interesting electronic circuits and we have written a couple of good tutorials on micro controllers like 8051, AVR, PIC etc. At the same time, we know we could have done a lot more for the electronics community! In this post, I am introducing you to our Social Media Profiles – which we shall keep active from this date….

Read More

Water level controller using arduino

Arduino water level controller / indicator. This article is a about a fully functional water level controller using Arduino. The circuit displays the  level of water in the tank and switches the motor ON when the water level goes below  a predetermined level. The circuit automatically switches the motor OFF when the tank is full. The water level and other important data are displayed on a 16×2 LCD display. The circuit also monitors the level of water in the sump tank (source tank). If the level in side the sump tank is low, the motor will not be switched ON…

Read More

Tachometer using arduino

Digital tachometer using arduino plus speed control. Tachometer is a device used for measuring the number of revolutions of an object in a given interval of time. Usually it is expressed in revolutions per minute or RPM. Earlier tachometers purely mechanical where the revolution is transferred to the tachometer through mechanical coupling (cable or shaft) , the rpm is determined using a gear mechanism and it is displayed on a dial. With the advent of modern electronics, the tachometers have changed a lot. This article is about a contactless digital tachometer using arduino. The speed of the motor can be…

Read More

Interfacing LCD to arduino

Interfacing  LCD to Arduino uno. LCD modules form a very important part in many arduino based embedded system designs. So the knowledge on interfacing LCD to arduino is very essential in designing  embedded systems. This article is about interfacing a 16×2 LCD  to Arduino. JHD162A is the LCD module used here. JHD162A is a 16×2 LCD module based on the HD44780 driver from Hitachi. The JHD162A has 16 pins and can be operated in 4-bit mode or 8-bit mode. Here we are using the LCD module in 4-bit mode. First, I will show you how to display plain text messages…

Read More