[TenTec] DDS PTO replacement for old Ten Tec rigs

w0ep w0ep at w0ep.us
Fri Oct 27 14:24:49 EDT 2017

There's a chip one can use in a rotary encoder application that uses a magnet . The chip senses the magnetic field as the magnet rotates.

I'm wondering if an RIT could be built using a electro-magnetic coil interfering with the magnetic field.


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On Oct 27, 2017, 04:01, at 04:01, Steve Hunt <steve at karinya.net> wrote:
>The Arduino analogue inputs provide 1024 level discrimination. 
>Translated to +/- 1000Hz that equates to 2Hz steps. I don't know why 
>that would be considered not smooth enough?
>I sent you the source code by private email yesterday.
>Steve G3TXQ
>On 26/10/2017 21:49, Curt Benjamin via TenTec wrote:
>> Steve, I've run that idea by a few Arduino guys including AD7C
>himself. They say yes, you can use one of the analog pins and you can
>"map" the 0-5VDC to say, an offset of +/- 1000 Hz but they say it's not
>smooth enough to use as RIT. I would like to try but I don't know
>enough about writing the code to add that function.
>> Regarding your PIC controller, I have a PIC ordered so I can copy
>your circuit. I'd rather use an AVR since I have some and also a
>programmer. Is there any way you could port your PIC code to an AVR, or
>would you be willing to release your source code so I can try to do it?
>> Curt K8AI
>TenTec mailing list
>TenTec at contesting.com

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