Re: Fw: Stair LEDs

["jonsemailstuff" <jonsemailstuff@xxxxxxxxxxx>]

The configuration could be done with a single button if you are
talking about using a uController of some sort. Something along these
lines:

1)Press and hold switch for (say) 10secs
2)Flash all LEDs twice
3)Pres button , wait for desired trigger time, press again.
4)Flash all LEDs three times
5)Press button, wait for desired light up gap, press again.
6)Flash LEDs in sequence at this speed to show what it looks like
7)Press button, wait fot desired turn off time, press again.
8)Flash LEDs four times.
9)Job done!

By pressing and holding the button for 10secs at any time you could
start again. The uC could also time out after a set time.

Obviously, a second button could make this more elegant.......=20

Jon


--- In ukha_d@xxxxxxx, ian.bird@... wrote:
>
>=20
> Sounds like it might be fun then. Don't really care about the
triggering
> method. I would just have an input or two dedicated to this and
buffer it
> with a debounce chip. This should with luck enable sleep mode to cut
power
> consumption. The third input for instant on must be that time when
you fall
> down the stairs - so you can see where you are going to land ;-)
>=20
> I was pleasantly surprised to see Atmel have dropped their processor
prices
> so it is more in line with PIC pricing and should keep the overall
cost
> down.
>=20
> The configuration method is the trickiest bit as serial is not the
be all
> and end all of doing this sort of thing. No serial ports or more
terminally
> no PC are considerations. Switches take a lot of inputs and are not
the
> most versatile method as the user will be choosing between a set of
pre
> designated options. Thinking cap on I think
>=20
> I will think about this as it should be something that can be made
quite
> quickly.
>=20
> Thanks
>=20
> Ian
>=20
>=20
>=20
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> ---------+---------------------------->
>                     Gareth Cook
>                     <g@xxxxxxx>
>                     Sent by:
>                     ukha_d@yahoogroup
>                     s.com
>
>
>                     16/03/2006 10:22
>                     Please respond to
>                     ukha_d
>
> ---------+---------------------------->
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>                                                                  =
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>          To:       ukha_d@xxxxxxx                        =
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>          cc:       (bcc: Ian Bird/CV/Novartis)                   =
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>          Subject:  Fw: [ukha_d] Stair LEDs                       =
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>=20
>=20
>=20
>=20
> Not sure if the Comfort relay boards support changeover - could use
that
> to trigger the "direction"
>=20
> As for programming - tricky - depends on what you want. Maplins
already
> sell a 10 output board for =A330 but that does flashy effects etc. I
dont
> need that. You could have some DIPs for time length etc for total
time to
> take to turn on, or the time between each light coming on.
>=20
> Apart from that, sounds good ! You could use it on the driveway with
the
> same LED's when someone comes onto the drive :-)
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> G.
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>=20
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> ----- Forwarded by Gareth Cook/UK/IBM on 16/03/2006 10:19 -----
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>=20
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>=20
> So, something like:
>=20
> Two inputs for triggers, beam breaks or something else? Probably
normally
> high and trigger when they go low.
> Outputs for say 15 or 20 LED's. These would probably use say 100ma max
> each
> (enough for at least 3 'normal' LED's at 12v)
> Some interface for programming (buttons, serial or something?)
> User definable delay between triggering and the first LED turning on
> User definable delay between each LED turning on (same for all)
> Delay to turn off LED's if no triggers to keep them on. Go off in
reverse
> sequence to the way they went on.
> Totally autonomous in operation. Configure, turn on and forget.
>=20
> Anything else?
>=20
> Thanks
>=20
> Ian
>