#ARDUINO MEGA 2560 DAC PINS SERIAL#

All of which is to say you should double check the actual resistor values using the colour bands and something like the chart from the link above. Additionally, the Arduino Atmel328 chip is able to write to all eight pins simultaneously and not sequently as was done when we used the digitalWrite() commands. It would be interesting to see if you had a multimeter that would verify that number.

#ARDUINO MEGA 2560 DAC PINS SERIAL#

It has 54 digital input/output pins (of which 15 can be used as PWM outputs), 16 analog inputs, 4 UARTs (hardware serial ports), a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button. The Arduino mega2560 has the most number of digital pins in the Arduino family and it is one of the reasons why it is called Arduino Mega. Attach the shield to the Arduino, making sure the pins line up. The documentation shows the pin mapping of Arduino-naming to module pinout. DAC (EVAL-AD5790) using an Arduino MEGA 2560. The Arduino bootloader is preloaded, hence the module is ready-to-use. = 150 * (5.0/1023) * ((1012 + 100) / 100) So your display would show 'V= 8.15' and 9v batteries are typically 6.5v to 8.4v. The Arduino Mega 2560 is a microcontroller board based on the ATmega2560. The Crumbuino-Mega is a low-cost module comparable to the Arduino-Mega 2560 and can be used as Arduino-Mega 2560 in the Arduino-IDE. Card Reader - Micro SD Card, with active voltage translators.

If the arduino was seeing a value of 150 when V_in was 9 volts the ((R1+R2)/R2) ratio would need to be: 9 / (150 * (5/1023)) = 12.276 Now, looking at the image you posted it's a bit hard to make out the resistors, but from what I can see and translating the resistor colour codes ( ) you have 2 x 506k for R1 and 1 x 100k for R2 - ((R1+R2)/R2): ((506k*2 + 100k) / 100k) = 11.12 Which is pretty close to the 12.276 ratio above if V_in were 9v, so using those values: voltage = value * (5.0/1023) * ((R1 + R2)/R2) 8.152. 4 used SD Card Select 10 used for W550 Select. = 150 * (5.0/1023) * ((200+10)/10) So the arduino is outputting a value of 150, which corresponds to it seeing a voltage of 0.733.

First off, for the number to show up like that the values of the voltage = value * (5.0/1023) * ((R1 + R2)/R2) equation come out to: 15.39589. The Arduino Mega 2560 is a replacement of the old Arduino Mega, and so in general reference, it will be called without the ‘2560’ extension. This was a fun little puzzle to work out.

Arduino mega 2560 dac pins