![]() ![]() The good news is that I did not damage my board. Of course all of this is really electrical engineering (and software engineering) but with the Due, the electrical engineering aspect is definitely back. I need some help, I want to begin using Arduino, I was working with Microchip, but I need more speed and I/O Ports, so I just bougth an Arduino DUE. But, again, the board defeats the Arduino purpose of more-or-less plug and play. Hi people First to say sorry about my English. Arduino Dues operating voltage is 3.3 volt and Ethernet shield operates on 5 volt supply. I really want to use the Due mainly for its speed, memory, and DMA. Master The Arduino Due To Communicate through Ethernet, WiFi, USB, Firmata, and Xbee Posted by Technical Literature on Jul 24th 2017 Arduino Sketches is a practical guide to programming the increasingly popular microcontroller that brings gadgets to life. The 5v LCD LMB162ABC runs nicely over the 3.3v Due with the LM339 isolation buffers|shifters. With this library you can use the Arduino Ethernet (shield or. I ended up placing an interfacing comparator in-line on every I|O pin (1/4 LM339) with pullup resistors. Enables network connection (local and Internet) using the Arduino Ethernet Board or Shield. I am building a generic 'calculator shield' which will run over the Mega2560, or the Due. Since the "Arduino way" as described in Massimo's Arduino bookĮncourages just plugging things in and trying it vs spending time learning Particularly given the Arduino target audience and especially I always thought it was pretty silly to create the DUE without 5v tolerant i/o pins, If the DUE gets damaged, is it just that one I|O pin, or does it damage the board more thoroughly?Īssuming the SAM processor also has protection diodes, they will be damaged / destroyed first followed by whatever Mother Nature feels is the most valuable part of the chip. I would take that to mean DO NOT EXCEED VCC+0.3. I can't find anything in the datasheet to indicate. what the tolerances are for mistakes (how forgiving is the circuit?). I would still like to know under what conditions the DUE can be damaged, is it current or voltage related.Īssuming the SAM processor also has protection diodes, over-voltage causes them to conduct. ![]() Beyond that they will be damaged / destroyed leaving the rest of the chip vulnerable to damage / destruction. The protection diodes can tolerate about 1mA of current. When the voltage is below -0.5 the "lower" diode conducts (clamping the pin voltage near -0.5). Shields that use the IOREF pin will be compatible both with the board that use the AVR, which operate with 5V and with the Arduino Due that operate with. When the voltage is above VCC+0.5 the "upper" diode conducts (clamping the pin voltage near VCC+0.5). There are a pair of internal protection (clamping) diodes connected to each I/O pin. Well, the SAM datasheet lacks a description of the pin driver so I will have to describe what happens when the voltage on an AVR pin is too high. ![]()
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