Atmega328pau microchip technology atmel mouser india. Atmega328pu microchip technology atmel mouser india. Preloaded with the arduino 16mhz bootloader operating voltage. Generally relay coils are designed to operate from a particular voltage often its 5v or 12v. The arduino lilypad microcontroller module atmega328 is an arduinoprogrammed microcontroller designed to be easily integrated into etextiles and wearable projects. Download moc3021, 3022, 3023 datasheet pdf format 100%. Get file now moc3021 has 6pin dip randomphase optoisolators triac driver output. The highperformance microchip picopower 8bit avr riscbased microcontroller combines 32kb isp flash memory with readwhilewrite capabilities, 1024b eeprom, 2kb sram, 23 general purpose io lines, 32 general purpose working registers, three flexible timercounters with compare modes, internal and external interrupts, serial programmable usart. Interfacing relay with 8051 using keil c at89c51 electrosome.
Relays are devices which allow low power circuits to switch a relatively high currentvoltage onoff. Moc 3021 datasheet download and save full moc3021 datasheet in pdf file format include pinout. Atmel atmega 32 interfacing with rf transmitter datasheet. The avr microcontroller section has ground plane on both sides. It is the first arduino board based on a 32bit arm core microcontroller.
Patient medication reminder circuit using atmega328p microcontroller. Atmega328p avr microcontroller with picopower technology. Onchip isp flash allows the program memory to be reprogrammed in system through an spi serial interface, by a conventional nonvolatile memory. By executing powerful instructions in a single clock cycle, the atmega328pb achieves throughputs close to 1mips per mhz. Microcontroller interfacing to relays using uln2003, in this article, you will learn how to interface microcontroller to relays using uln2003 relay driver circuit. A relay is an electromagnetic switch used to switch high voltage or current using low.
Relay interfacing with microcontroller 8051 microcontroller. Please see my ds7 article, which includes all the i2c routines we will need to communicate with our display. Interfacing relay to microcontroller dna technology. Slas735j april 2011 revised may 20 mixed signal microcontroller 1features low supplyvoltagerange. Dont forget the protection diode parallel to the relay with cathode connected to 12v. This empowers system designers to optimize the device for power. It offers the same functionality you find in other arduino boards, in a lightweight, round package designed to minimize snagging and profile, with wide tabs that can be sewn down. Here we are not using any relay driver ic like uln2003 and will only use an npn transistor to control relay components required. Atmega328p microcontroller pinout, pin configuration. The arduino uno is a microcontroller board based on the atmega328 datasheet. I may use either usb or rs485 interface to connect the board with pc. The atmega328p xplained mini evalutation kit is a hardware platform for evaluating the atmega328p microcontroller. See the block diagram of driver circuit which i used in my project.
One byteoriented 2wire serial interface philips i2c compatible. The picopower atmega328p is a lowpower cmos 8bit microcontroller based on the. A relay is an electromagnetic switch which is used to switch high voltagecurrent using low power circuits. A relays is an electrical switch that opens and closes under control of another electrical circuit. Atmega328pu microchip datasheet and cad model download. It has an eeprom memory of 1kb and its sram memory is of 2kb. It is the most popular of all avr controllers as it is used in arduino boards. Compare pricing for microchip atmega328pu across 28 distributors and discover alternative parts, cad models, technical specifications, datasheets, and more on octopart. Arduino relay control tutorial with code and circuit diagram. The transistor will be in off state when the when the pin p2. A relay should not be directly connected to a microcontroller, it needs a driving circuit. Bistable multivibrator using 555 timer interfacing gsm module with arduino. The atmel atmega328p is a lowpower cmos 8bit microcontroller based on the avr.
Interfacing lcd with atmega32 microcontroller 8 bit mode. Atmega328p is high performance, low power controller from microchip. It is a serialdata protocol which uses two data lines for communication. If you want to go with 12v relay then you need a transistor being powered through a resistor at its base from arduino, emitter to gnd, collector to relay and the other end of the relay to 12v.
A relay should not be directly connected to a microcontroller, it needs a driving circuit due. Lecture 6 introduction to the atmega328 and ardunio. Drive relay with avr microcontroller do it easy with. Abbs interface relays and optocouplers provide reliable voltage conversion between process peripherals and higherlevel control systems. Interfacing lcd with atmega32 microcontroller using atmel. Ground plane considerations for atmega328 in relay controllers. It is activated by energizing a coil wounded on a soft iron core. When microcontrollers output port is in low state 0 no current flows to the base and the transistor is in off state. To drive relay you need to connect simple amplifier made of one transistor.
Atmega328pau microchip technology atmel 8bit microcontrollers mcu 32kb insystem flash 20mhz 1. Add a seven segment led display to your avr microcontroller. Arduino atmega328p architecture explained engineering. Serial peripheral interface spi is an interface bus commonly used to send. The arduino uno is a microcontroller board based on the. Filter for what you need samd21, ptc, 555 octopart makes searching for the right parts easy. Interface relays and optocouplers electronic relays and. Atmega328p datasheet 7810davr0115 2 io and packages 23 programmable io lines 32lead tqfp, and 32pad qfnmlf operating voltage. Digikeys tools are uniquely paired with access to the worlds largest selection of electronic components to help you meet your design challenges headon. Atmega328p is an 8bit microcontroller based on avr risc architecture. So in this arduino relay control tutorial we will simply learn how to interface a relay with arduino. It has 14 digital inputoutput pins of which 6 can be used as pwm outputs, 6 analog inputs, a 16 mhz crystal oscillator, a usb connection, a power jack, an icsp header, and a reset button.
The standalone atmega328p as arduino can conveniently be divided into two ways. To interface relay with microcontroller we need a driver circuit to drive the power to relay. Arduino arduinoboarddue main site arduino due arduino due front arduino due back overview the arduino due is a microcontroller board based on the atmel sam3x8e arm cortexm3 cpu datasheet. The shield is a solution for driving high power loads that cannot be controlled by arduinos digital ios, due to the current and voltage limits of the controller. To drive relay you need more than 20ma the current can one pin drive. Our relays ensure reliable signal switching and provide electrical isolation for sensitive electronics such as plcs in all kinds of machinery. Atmega328ppu, atmega328p datasheet, atmega328 28pin 20mhz 32kb 8bit microcontroller, buy atmega328. Pdf patient medication reminder circuit using atmega328. Im wishing to control the relay with an arduino, if possible. Here you can see that output from microcontroller enter transistor via resistor r1 4k7. Atmega328 is an 8bit and 28 pins avr microcontroller, manufactured by microchip, follows risc architecure and has a flash type program memory of 32kb. Wiring a stand alone atmega328p cmos 8bit microcontroller. Arduino uno is a microcontroller board based on the atmega328p datasheet.
If you want to know more about relay driver circuit uln2003, relay working and relay interfacing with arduino check these articles. Atmega328ppu program guide atmega48a, atmega48pa, atmega88a, atmega88pa, atmega168a, atmega1688pa, atmega328, atmega328p datasheet 51 pages, 719 kb 20180329 view atmega328ppu other datasheet pdf 448 pages, 12039 kb view. Atmega328ppu microchip technology atmel mouser europe. Atmega328p is a 28 pin chip as shown in pin diagram above. Microcontroller may stop working by the negative voltages produced in the relay due to its back emf. The kit provides access to the features of the atmega328p enabling easy integration of the device in a custom design. The evaluation kit comes with a fully integrated debugger that provides seamless integration with atmel studio. Note the use of a back emf suppression diode across the relay contacts. Electromechanical relays interfacing circuits with. Atmel atmega 32 interfacing with rf transmitter datasheet, cross reference, circuit and application notes in pdf format. We have demonstrated interfacing of lcd module with atmega328 microcontroller, which will help you to learn. They are connected according to the table given below.
Microcontroller interfacing to relays using uln2003 relay. This is why you cannot connect relay directly to microcontrollers pin. For detailed working of relay please visit this page. Interfacing relay with 8051 using transistor circuit diagram. For more detail about the atmega328p please refer to the datasheet below. Introduction to atmega328 the engineering projects. In this tutorial we will discuss the interfacing of the relay board with 40 pin avr development board. If desired, the relay can be powered by a separate power supply, so, for instance, 12v solenoids can be controlled by the microcontroller. Atmega328pb datasheet introduction the picopower atmega328pb is a lowpower cmos 8bit microcontroller based on the avr enhanced risc architecture.
I took apart an old microwave oven and found the relay the computer chip closes to activate the magnetron. This resistor limit the current and only very small current flows from the base to the emitter. Relay isolates low power circuits from high power circuits. Here i used diode d11n4148ws, resistor r1 1k, transistor t1 bc547, 12 v power supply and 6v relay. One important part of this circuit is the diode, which protects circuit from induction caused when switching relay. It has 8 pin for adc operations, which all combines to form porta pa0 pa7.
Atmega328pb datasheet atmega328pb microchip technology. It is therefore connected to ouput pins of the microcontroller and used to turn onoff highpower devices such as motors, transformers, heaters, bulbs, antenna systems etc. Design and implementation article pdf available march 2018 with 7,0 reads how we measure reads. Whenever we need to connect any ac appliance in our embedded circuits, we use a relay. The atmega328p with its associated support component of the usb to serial interface to upload the sketch codes and to provide the serial communication that was to replace the parallel port. The input is taken from the microcontroller pins and the output corresponding to each input is given to the 5 relays on the output. Standard circuits 3 the relay interfacing circuit a relay can be used to switch higher power devices such as motors and solenoids. Atmega328ppu microchip technology atmel 8bit microcontrollers mcu 32kb insystem flash 20mhz 1. Atmega328au microchip technology atmel mouser canada.
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