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Circuit design, check!

A project log for SATRAN - Satellite Tracking Antenna

Wifi-controlled, azimuth/elevation antenna rotator.

daniel-nikolajsenDaniel Nikolajsen 01/06/2022 at 10:180 Comments

Yesterday I finished up the new circuit design and ordered some prototype boards. They should arrive within a week and then I can wire up the very first MK2 rotator. 

There will  most certainly be some more adjustments to the electronics design and some extra filters to make it handle whatever EMI that might occur. But since all needs to fit on a 80x80mm board you need to be quite nifty. Also I prefer to use through-hole components instead of SMD for their durability and solderability.

As you might have noticed, the board will have two RJ45 connectors. One for the rotator, and the other one for RS232 serial interfacing. I have my concerns on RJ45 and a short TP-cable being able to handle the motors and sensors without glitching, but I like to experiment. The control board will be housed in its own water tight housing, on a meters length away from the rotator and its high-powered antenna(s).

To the left on the board there is a fuse holder, which I am not quite sure about if it's needed? It takes up a lot of space on the board, so I might replace it with a RC-filter that put a limit on the current while also removing HF-noise.

I will also do some experiments and see if it would be possible to run it over serial/USB which is preferred by some, plus there are already a lot of documentation out there on Satnogs, Gpredict etc with serial comms.

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