[TowerTalk] wireless rotor

[Jeff Blaine]

The noise I hear from it when sniffing is from the USB cable, not from the 
GH unit specifically.  I put ferrites on both ends of the USB just as a 
precaution anyway.

The presence of a uP near the antenna does not necessary indicate trouble. 
And a lot of those uP units will have a sleep state setting as part of the 
hardware which is enabled by the firmware.  So the device wakes up when 
tickled by some input (like a RX flag) - or at a periodic time interval.  It 
really depends on the implementation for that unit.

73/jeff/ac0c
www.ac0c.com
alpha-charlie-zero-charlie

-----Original Message----- 
From: Les Kalmus
Sent: Wednesday, April 10, 2013 4:01 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] wireless rotor

None that I can hear.

Les W2LK

On 4/10/2013 4:44 PM, Jack Brindle wrote:
> Maybe.
>
> Putting a major noise source (micro controller with lots of high-speed 
> clocks) right at the single most important quiet area might not be that 
> good of an idea. Adding chokes and bypass caps to knock down the noise can 
> only go so far. I'd rather not have the noise generator at the antenna in 
> any case.
>
> Which brings up the question, what kind of birdies and noise does the 
> Green Heron and similar devices add?
>
> Jack B.
>
> On Apr 10, 2013, at 7:06 AM, Jim Lux <jimlux at earthlink.net> wrote:
>
>> On 4/10/13 6:38 AM, Charles Lind wrote:
>>> I've been using Green Heron Everywhere for three years to control a 
>>> rotor
>>> and switching for five antennas with no failures or downtime.  Saves a 
>>> lots
>>> of expensive cable, the groundhogs can't eat the wireless signal, and if
>>> something were to go wrong, I wouldn't have to dig up 400 feet of cable.
>>> Chuck, N8CL
>>>
>>>
>> this really is how hams should be heading.. with cheap wireless 
>> interfaces, Arduinos with 802.11 or Zigbee, etc.
>>
>> There's a nice $50 relay board from Velleman (K8056) that has 8 SPST 
>> relays on it and can be controlled by RS232, TTL serial, discrete 8 bits, 
>> or a RF receiver module.  They also have 16 and 4 relay boards.
>> THere's probably a ton of things from SparkFun that stick right onto a 
>> Arduino.
>>
>>
>> There's even a new Ethernet Relay card from Velleman
>> http://www.velleman.eu/products/view/?id=407510
>> $150 on Amazon..  Pretty slick.
>>
>> There's a Arduino with Ethernet built in and lots of example programs out 
>> there to do basic control stuff (or complex control stuff).
>>
>> It won't be long before someone builds an open source rotator controller 
>> using an Arduino and H bridge or relay board. They're cheap, easy to 
>> learn to program (either in C using free tools, or in the sort of C-like 
>> Arduino IDE) and plenty smart enough to run a control loop for a rotator.
>>
>> Get yourself a nice WiFi bridge (I like using the 5 GHz band so I don't 
>> have to fight all the 2.4 GHz stuff) and you're done.
>>
>>
>>
>> And, hey, it uses *radio*... we can move beyond wired telegraphy to, 
>> gosh, wireless.
>>
>> (I will happily buy a beverage of choice for the first person who 
>> controls their antenna with a spark gap transmitter and coherer, though. 
>> Very steampunk..)
>>
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