dennis@home wrote:



It should be easy with one of these
http://www.maplin.co.uk/Module.aspx?ModuleNo=42857


It's a nice kit, available ready-built (I've bought one, in the past).
The digital outputs can sink enough to power a single relay without any
further buffering - I've used one to drive a 12vDC relay directly.

The supplied drivers are windows-only, however, there is a third-party
linux application available, with links from Velleman's site, supporting
scripted behaviour.

It's a bit like using a sledge-hammer to crack a nut, but the card could
always be used for "other" things as it's capabilities are recognised.