[TowerTalk] synchro to RS232

[jimlux]

On 11/19/18 12:13 PM, Gerry Hull wrote:
> I solved the problem the Q&D way by putting a camera on the Telrex display.
> 
> If you do it on Arduino, I'd be interested.
> 
> Analog Devices chips:
> 
> https://www.analog.com/en/parametricsearch/10890

The ones that actually do a synchro (with 3 inputs, etc.) are pretty 
pricey (>$2000) each

The $10 chips do provide a "measure amplitude and phase with respect to 
a reference", and you'd need three of them.

I think for a 1 degree accuracy device that doesn't need to work at many 
rev/second, one can do well enough with a more crude hardware approach.

The 10-12 bit ADC in the Arduino should be good enough.

You'd need some resistor voltage dividers to get the voltages in the 
right range.




> 
> Gerry W1VE
> 
> On Mon, Nov 19, 2018 at 2:09 PM jimlux <jimlux at earthlink.net 
> <mailto:jimlux at earthlink.net>> wrote:
> 
>     Just how common are synchro/selsyns in ham applications..
> 
>     I'd be willing to do a Arduino thing that can read one and generate USB
>     serial/RS232 output or a display.
> 
>     I think I gave away my box of motors to some ambitious soul - Does
>     anyone know of a place to get a cheap, representative example of the
>     sending end?  Anything less than $50 is fine.
> 
>     A 400 Hz size 19 or 23 would be just fine.
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