[amsat-bb] Re: inquiry about homebrew az-el systems

Ing. Pavel Milanes Costa pavel at conas.cu
Mon Feb 25 11:41:16 PST 2013

Hi to all...

I'm involved on a task like these...

Building a super-cheap AL-EL rotator...

I'm in Cuba (FL11ai), No RadioShack or ANY other store for electronics 
hobbyist... even common pics or LCD screens are rare items here...

Talking with my local hams I have managed to get my hands on a 10 years 
old surveillance camera made in Japan...

The unit is full waterproof and with more than 10 years in service, it 
have some age marks on the outside but it's shinny new on the inside... 
this could be a good start up point...

It have full 360 in azimuth with end switches and only 0-140 degrees on 
the elevation plane, the local ham who give this item to me use one for 
move a 7 elements full aluminum Yagui for 2m... for more than 3 years 
now. (no position system, just visual aim)

I'm thinking in a kind of gray-encoder for position sensing on the rotor 
to a parallel port of my PC and the software will be my debut on python 
software (learn python is one of my personal goal this year, and this 
project is the perfect start...)

just my 5 cents...

73 de CO7WT.
Pavel Milanes Costa.

El 23/02/13 22:41, Lizeth Norman escribió:
> Samudra,
> This is a good question for a first year engineering student like
> myself: How does one bring home the best bang for the buck out of an
> engineering dollar?

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