![]() ![]() Here, AVR stands for Audio Video Recorder and RISC. The circuit: Potentiometer attached to analog input 0. The amount of time the LED will be on and off depends on. ![]() turning on and off a light emitting diode (LED) connected to digital pin 13. The Mega 2560 is based on AVR RISC Architecture. Demonstrates analog input by reading an analog sensor on analog pin 0 and. But transistors are cheaper, faster and smaller then relays. The Pinout of Arduino Mega is shown below: The description of pins present on the Arduino board are listed below: ATmega2560 Microcontroller - The Atmega2560 is a CMOS (Complementary Metal Oxide Semiconductor) low powered 8-bit microcontroller. It is possible to find very low current draw 5v relays that the Arduino can drive directly, then the relay contacts can switch the higher current load on and off. You are going to have to learn how to utilize external transistors to switch currents. Besides in addition to the 40ma per pin limit there is a total package current output limit of around (I think) 200ma so you are not there that way even without switch timing problems. Because you can't insure that you can turn on all 10 outputs at the same instant in time there will be unequal current draws and short term short circuits. No that is not a practical solution to parallel connect 10 output pins together. The board contains 54 digital input/output pins, 16 analog inputs, 4 UARTs (hardware serial ports), a USB connection, a power jack, an ICSP header, and a reset button. Now, is it possible (and safe) if, say, I connected the output from the pins from 2-12 (according to this doc, it says each out supplies 40ma of current) to the motor, and then turn them all on to start the motor? Afterall, 10 x 40 is 400ma, pretty close to 500ma that the 5V pin supplies. ![]()
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