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@earthlink.net
<mailto:jimlux@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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