[Elecraft] Relay boards for remote control?

[Tom]

Hi,
I  wondering about the USB versions. They have a caution in the docs about a power cycle, which causes the relays to switch several times during power up of the computer. This could cause some undesirable effects I would think.
The serial and Ethernet do not seem to be affected. And, what is the difference between the serial versions which use a USB connector anyways?
Any ideas? They do look good, with relays supporting 15a at 120
Tom

Va2fsq.com

Sent from my iPhone

On 2013-07-16, at 7:25 PM, William Evans <bill.ham at w4ish.net> wrote:

> I have used the denkovi 16 relay set and the 8 relay set with ethernet access to design and build a controller which automatically selects either my normal antenna for each band or an alternate antenna for that band.  I use the K3's BCD outputs to determine the band, and a arduino programmed to decipher which relay to kick in.  The unit also will switch my two radios over to a dummy load (all done through relay switching of 12 volt lines).  I use the ethernet module to control the relays when I have a radio in my living room (as opposed to the one in my shack).
> With the denkovi relays, you can choose from ethernet controlled, USB control, or serial control, and they have some excellent software for each module. The ethernet module has a built-in web site which you can set up to access from your computer.
> 
> I have not found any negatives with these units.  They are well-built and well documented.    
> 
> Bill
> W4ISH
> 
>> On Tue, Jul 16, 2013 at 1:06 PM, Tom <tomb18 at videotron.ca> wrote:
>>> Can anyone tell me what would be the most popular rs232 (or USB) relay board for use in computer control of a k3 setup? I use the canakit 4 relay USB board. Are there others?
>