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Topic: DAC voltage (Read 834 times) previous topic - next topic

lordk

Is DAC voltage 0-3.3V?

I need a 1.1-3.90V to simulate a joystick.

Regards,
Sebastian.

CrossRoads

Try it:
analogWrite (pinX, 0x0fff);
put a meter on & measure it.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

Gericom

It's between 1/6 and 5/6 of 3.3v. So it does not start at 0v and does not end at 3.3v
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CrossRoads

That is odd. Still, will not reach 3.9V. Easy way might be just add a 0-5V opamp and SPI the data that corresponds to the range you want.
Or two I guess, for left-right & in-out.
http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en024016

Could also mess around with op amps, add some offset and adjust the gain so it goes 2.5V +/- 1.4V
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

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