Re: wiegand data interference

["Bill" <billnomailnospamx@xxxxxxxxx>]

Use shielded wire, which is metal foil wrapped around the outside of the
cable. This keeps outside electrical noise out. Ground one end of the metal
foil.

Then there is "voltage drop" with long distances. Use a larger gauge wire
for long distances. Something which starts out as 5 volts on one end can be
2 volts at the other end!

Voltage drop calculator...
http://www.nooutage.com/vdrop.htm

Shielded cable...
http://images.google.com/search?q=Shielded+cable&hl=en&sa=N&um=1&ei=ixs-S8_8DIyGtAOlod0G&oi=images_breadcrumbs_list&ct=images-breadcrumbs-list&cd=1



"Dave White"  wrote in message
>I am having issues with a card reader in my elevator not sending wiegand
>data to my controller. all voltages are good at the reader. think it may be
>interference causing problems.
> will a wiegand extender fix this issue?
>