![]() Thanks for the info on using serial input as a command. Wow! 49 switches with only using 14 inputs! Fantastic but I looked at the library and it is above my level of expertise but I will work towards it. Here, AVR stands for Audio Video Recorder and RISC. The Mega 2560 is based on AVR RISC Architecture. Incidentally some MEGA clones (I know of the Seeeduino one) bring out more pins to headers, the 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. The typical input resistance of CMOS circuit at room temperature is in the 10^10 to 10^11 ohms range,Īt higher temperatures it can drop preciptously to 10^8 ohms or so, in practice you've never notice. TheyĪre exactly the same as any other digital pin when used as digital pins. The analog pins are only connected to the ADC when a call to analogRead selects them anyway, so if youĭon't call analogRead on a pin, its isolated from the ADC (again by a practically infinite resistance). This is the kind of thing I used some years ago (with other hardware) to build a hardware-in-the-loop simulator of a Cessna Skymaster. Shows the equivalent circuit and load capacitance which become important at higher frequencies. With the Arduino Mega 2560, you can run the code in 'external mode' where the model running in the Mega can be monitored and controlled from the Simulink visual interface. The ADC has a much higher impedance than that - it is precise to better than one part in 1024 with a 10kĭriving impedance, so clearly its impedance must be > 10M - at DC. the ADC 30k impedance) - or if that only comes into play given an analogRead (vs. I'm not certain how well the "analog in" pins work as digital inputs (viz. All pins are capable of digital output, even the "analog in" pins. This text is in the documentation : 'The Arduino Mega 2560 is a microcontroller board based on the ATmega2560.
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