Re: LED Fun Challenge

["David Buckley" <db@xxxxxxxxxxx>]

--- In ukha_d@xxxxxxx, "Rob Mouser" <groups@m...> wrote:
> A friend of mine has just moved into a new (very posh) pad.
> He has an oak and steel spiral staircase and wants to add
> some discreet LED lighting to it. But of course just on/off
> wont do! He wants to have pir activation from the top and
> the bottom AND when it is activated he wants the LED lights to
> come on in sequence one step at a time (Fairly fast.) and then
> all remain lit for a set period of minutes. But it doesn't
> stop there! .......

Clearly, money is no object here.

PLCs.  "Low cost" PLCs like the Siemens Logic, or one of the many
identical units, like the Crouzet, Moeller etc.  You'll need relay
output models with either an expansion capability, or use
several "basic" PLCs and chain one from another.

It'll take an hour to program, and work forever, with 100%
reliability.

Granted its on the face of it a much more expensive solution than
using a PIC and building something, but given that RS deliver stuff
next day it can be installed and up and running in a day.