It can provide or receive a maximum current of 40mA, but only 20mA continuous, which is merely sufficient to drive a single-color LED 20mA for full brightness continuously. Each pin operates at 5V at HIGH and 0V at LOW.Use function pinMode(0-13, INPUT|OUTPUT) to configure the pin for input or output and digitalRead(0-13) or digitalWrite(0-13, HIGH|LOW) to read or write.14x Digital INPUT/OUTPUT pins (numbered from 0 to 13):.Reset Button: to reset/restart the program.Flicker during sketch upload and serial communication. TX and RX LEDs: indicate communication between the Arduino board and your computer.Also connected to Digital Pin 13 for program testing and debugging. Load cum Pin-13 LED: Flicker during sketch upload. Power-on LED: indicate that the Arduino board is receiving power.On-board Built-in LEDs: These LEDs are useful in debugging.The current available at 3.3V pin is 50mA.If the board is powered via USB, the total current available for "on-board" and "external use via the 5V power out pin" is 500mA (and much less for the other power sources).Power OUT (5V and 3.3V pins): The board regulated 5V and 3.3V output for powering external components.USB connector is better than the crappy header pins and you can't mess up the polarity. Get an old USB cable, cut the plug off the other end, and connect Red wire to 5V supply and Black wire to GND. A better way is to connect your 5V power supply to the USB connector. This is not recommended because you could get the polarity and voltage wrong and damage your arduino. Power by 5V supply: Although the 5V pin is meant for powering external components, you could power the Arduino via the 5V/GND pins.DC Power Jack (7-12V via AC-to-DC adapter or battery pack).USB Connector (5V): also double as serial port to communicate with the computer (e.g., for loading program).Power IN: The power to Arduino board can be supplied via:.An Atmel (bought over by Microchip in 2016) ATmega328P 8-bit Microcontroller ( Complete Datasheet - 442 pages, Summary - 24 pages), with 32KB of Flash memory for programs, 2KB of SRAM for data, and 1KB of EEPROM for non-volatile data.I suggest that you buy an "Arduino Starter Kit", which comes with an Arduino UNO board and various electronics components (LEDs, resistors, transistors, motors, breadboard, wires, etc.) for you to start some simple experiments, for US$20-40.Īn Arduino UNO board contains the following: A minimal "Arduino UNO" board for starter costs less than US$5 and can be purchased thru many online stores. Getting Started with Arduino UNO Step 0: Buy an Arduino BoardĪrduino Board comes in many flavors. It is intended for artists,ĭesigners, hobbyists, and anyone interested in creating interactive "Arduino is an open-source electronics prototyping platform based onįlexible, easy-to-use hardware and software.
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