Tag archives for Relay

Interfacing a Relay with PIC Microcontroller – MikroC

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A relay is an electromagnetic switch which is used to switch High Voltage/Current using Low power circuits. Relays isolate as well low power circuits from high power circuits, this is a good feature especially for safety reasons a section of the circuit with high dangerous voltage/current could be isolated from the user. When a low voltage is applied to the relay (coil wounded on a soft iron core), this coil becomes a magnet which in turns energizes the soft iron core which closes or open the high voltage/current contacts of the relay. A relay can be used to switch higher power devices such as motors, light bulbs solenoids etc. In this article we are going to learn how to interface a relay to a PIC Microcontroller, we will learn as well how to control devices connected to the relay using MikroC compiler.

Microcontroller Interfacing – Basics

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Microcontrollers have become very useful in embedded design as they can easily communicate with other devices, such as sensors, switches, LCD displays, keypads, motors and even other microcontrollers. A microcontroller is basically used as the brain or intelligent processing unit to control other devices connected (interfaced) to it in embedded systems just like a PLC in industrial automation. To interface a device to a microcontroller simply means to Connect a device to a microcontroller. This article will make it easier to anybody with very limited experience in electronics to learn how to interface commonly used devices like an LED, a switch, a transistor, a relay, a display, a keypad, a buzzer and so on to a PIC microcontroller.

Interfacing a Relay with PIC Microcontroller – XC8

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A relay is an electromagnetic switch which is used to switch High Voltage/Current using Low power circuits. Relays isolate as well low power circuits from high power circuits, this is a good feature especially for safety reasons a section of the circuit with high dangerous voltage/current could be isolated from the user. When a low voltage is applied to the relay (coil wounded on a soft iron core), this coil becomes a magnet which in turns energizes the soft iron core which closes or open the high voltage/current contacts of the relay. A relay can be used to switch higher power devices such as motors, light bulbs solenoids etc. In this article we are going to learn how to interface a relay to a PIC Microcontroller, we will learn as well how to control devices connected to the relay using MPLAB XC8 compiler.

Automatic Temperature Control System using PIC Microcontroller – XC8

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An automatic temperature control system has the ability to monitor and control the temperature of a specified space without human intervention. This project uses a PIC microcontroller to automatically control the temperature of an area. This area could be a small plant, a house or any place or device that require a controlled temperature like an incubator (egg) for example. The desired temperature setting is entered using a keypad. The temperature of the area is measured using an analog temperature sensor. The microcontroller reads the temperature every 10 s and compares it with the desired value. If the desired value is higher than the measured value, then the heater is turned ON, if on the other hand the measured value is higher than the desired value, then the fan is switched ON. An LCD display shows the measured temperature continuously. The project is designed using MPLAB XC8 Compiler

Arduino Shield Tutorial – Make Your Own Relay Shield

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Arduino shields are boards that can be plugged on top of the Arduino PCB to extend its capabilities. This makes prototyping with Arduino plug and play. Instead of soldering or wiring external devices or sensors, you can simply hook your board with a shield. This speeds up development time even for absolute beginners. This is a practical tutorial, we're gonna build a fully working complete Arduino Relay shield, we're gonna go through all the steps

SMS Controlled Relay with PIC Microcontroller- MikroC

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In this project we are going to learn how  to control a relay connected to a PIC microcontroller with an SMS using mikroC compiler. This relay could be used in many applications to Switch ON or OFF devices such as an electric bulb, or opening a security boom gate like in this example. A security access control can be implemented at apartments or housing complexes, when a visitor arrives at the gate, he/she can phone the visited person who can send an SMS: "OPEN" to the gate cellphone number, upon receiving this message from the GSM module, the PIC will trigger the relay to open the gate and then close automatically the gate after a short delay or after the car has entered the into the housing complex (Infrared beam detectors could be used to detect if a car has passed the gate).