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@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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