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Old 3rd May 2019, 9:01 pm   #13
buggies
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Join Date: Jan 2009
Location: West Lothian, UK.
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Default Re: Arduino based DDS with 898 Eddystone dial

Quote:
Originally Posted by roberthewitt View Post
Thanks to all for input . I endorse the comments about the "silky flywheel tuning" and will stick with manual tuning. Using a simple pot as voltage divider a 0 -5v swing gives input values of 0 -1023 to the Arduino . The pot can be tuned through 180 deg in parallel with the main shaft which" tunes" the encoder. The position of the pot wiper (ie between 0 -1023) would then always indicate the position of the dial even after switch off/on.
Robert
You would only get about 0 - 680 count if only rotating the pot 180 degrees of its full 270. Perhaps use a higher (stabilised) supply voltage with a preset at each end for setting the 0 and 1023 points. Bit like tracking with trimmer and padding caps...
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