Category: Electronics Projects

In the project “Arduino Based multiple Device Control using Interrupt” you will learn how to control multiple appliance with two switches by using the concept of interrupt. In this prototype we are going to control four devices using two interrupt pin (switch). You can increase or decrease the number of devices according to your requirement but number of switches is same (two). When button is pressed, interrupt sun-routine is called and control algorithm runs. Features of Arduino Based multiple Device Control using Interrupt: Only two button switches are used to…

Today, in the article “Sinusoidal Frequency Meter using Arduino” you will learn how to measure the frequency of sinusoidal wave using arduino. With the purposed design one can measure sinusoidal frequency of about 20 Hz to 5KHz. Features of Sinusoidal Frequency Meter using Arduino Rectifier is used thus digital in natures. Optocoupler is used in order to isolate frequency circuit and control circuit and this optocoupler is also used to generate spike. Dedicated LCD for displaying frequency. Circuit Description of Sinusoidal Frequency Meter using Arduino Circuit of sinusoidal frequency meter…

The project “Arduino Based Temperature Controlled Fan” is extended version of previous post “Temperature Controlled Fan using Arduino”. Speed of fan depends upon the temperature it detect. This project has various features like: Features of Arduino Based Temperature Controlled Fan Automatic fan speed control according to temperature. Temperature and speed are displayed over LCD. Control Circuit and Load circuit is isolated using opto-isolator 4N35 i.e. more protection. High Power drive circuit i.e. can drive high power high voltage DC fan. Maximum temperature indication using glowing LED. Circuit Description of Arduino…

Today in this tutorial we will see the interfacing optocoupler with Arduino (4N35 or MCT2E). Optocoupler is also called an optoisolator. But before that let’s see what an optoisolator or optocoupler is? What is Optocoupler or Opto-Isolator: Optocouplers or optical isolators are designed to electrically isolate one circuit from another while allowing one circuit to control the other. The usual purpose of isolation is to protect from high-voltage transient, surge voltages, and low-level electrical noise that could result in an erroneous output or damage to the device. Such isolators allow…

In this article, you will learn how to Measuring Temperature using PT100 and Arduino. PT100 is a platinum resistance thermometer, which changes its internal resistance according to temperature. In the name PT100, 100 represents ohm i.e. it offers 100-ohm at 00C. Similarly, PT1000 offers 1000-ohms at 00C. PT100 is widely used in industries because of its temperature range. From the nature of the resistance thermometer, we conclude that tolerance depends upon the range we are using it. When we used to measure temperature nearer to 00C (in both positive and…