"PeterD" wrote in message
...
On Thu, 16 Nov 2006 06:59:13 -0500, "Wombat-Pipex-News"
wrote:

Hi all.
Can anyone give me a diagram or help on how to do this..
I've got 3 LEDs, and 3 Momentry Switches.
Id like to make it so that 1 LED is on at all times.
eg.
123 - ABC
Press 1 and A Lights, BC off.
Press 2 and B Lights, AC off.
Press 3 and C Lights, BC off.
And so on. Defalut would be 1-A when inital power up is done.

I could do this dead easily with small relays, but Im trying not to use
them. Idealy it would use Transistors or a small chip.
The source is +5V fed from a 7805
Im trying to get away from the old Clicking way of doing it. !!

Any help on this would be very welcome.

Here is what its for.
http://www.youtube.com/watch?v=fT1mNeno8XY
The 3 Large LEDs at the bottom center.

Regards
Wombat.


WEll, I don't see 3 large leds at teh bottom center, but...

Perhaps three flip-flops?

Doing it with one switch is really easy with a counter. (press and A
lights, press again, B lights, press again, C lights, and over again).


Ya just use a counter chip. 1 pulse moves on. Similar to the one Ive got for
the other 4 LEDs.
Though Ive got them in Latch Mode, so they stay lit. there is actual 8 LEDs.
4 are located on another remote board, fed from a 3rd plug in board.

Thanks
Regards
Wombat.