Electronic Circuits and Diagram-Electronics Projects and Design

Frequency counter using Arduino (upto 40KHz). Many guys here were asking for a frequency counter and at last I got enough time to make one.  This frequency counter using arduino is based on the UNO version and can count up to 40KHz. A 16×2 LCD display is used for displaying the frequency count. The circuit has minimum external components and directly counts the frequency. Any way the amplitude of the input frequency must not be greater than 5V. If you want to measure signals over than 5V, additional limiting circuits have to be added and i will show it some…

A new year has began and people all over the world are looking forward with good hope. What’s in cards for people in the Electronics industry ? Well, the 8th IPCA Electronics Expo India scheduled to happen on August 20-22, 2015 is definitely an event to look forward. This event attended by industry leaders in different sectors of electronics is all set to take place in Pragati Maidan, New Delhi, India. IPCA Electronics Expo’s aims to provide the electronics industry with a stable platform to grow, it brings together the key segments of electronics on a single platform. The exhibition…

Interfacing pressure sensor to arduino SPD005G. This article is about interfacing  pressure sensor to arduino. The pressure sensor used here is SPD005G from Smartec . SPD (Smart Pressure Device) is a series of silicon based pressure sensors suitable for industrial as well as house hold applications. These sensors are generally available in plastic inline or dual inline packaging. SPD sensors are generally available in two operation modes namely gauge type and absolute type. In gauge type the pressure is measured with respect to the atmospheric pressure. There is  a small vent on the package for getting contact with the atmosphere….

Hi Everyone, Today we are announcing a happy news in CircuitsToday. We are launching an Online Store at Store.CircuitsToday.com We will be Live from today, 18th December 2014. We are launching with only 8051 Micro controller based Project Kits for Engineering Students and Hobbyists. We will be adding more inventories very soon in our online shop. You can expect popular and commonly used products for sale in coming months. WE WILL BE SELLING MAJOR ELECTRONIC COMPONENTS DEVELOPMENT KITS  PROGRAMMERS  EVALUATION BOARDS  SENSORS and IC’S  ARDUINO’s and RASPBERRY PI’s  PROJECT KIT for STUDENTS and HOBBYISTS   WE OFFER   HIGH QUALITY…

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…

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…

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…

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…

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…

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…