[simpits-tech] Circuit question - plus another for Gene

[Joseph Fagner]

I would say your best bet would be to program a simple PIC to do this job.
You simply need one analog input line and 7 output lines.  Your code could
be adjusted so that you get whatever linear or non linear behavior you
desire.

Or, you might be able to use an 8 bit Analog to Digital chip and simply move
the pot, find which of the 8 bits goes high and use that to drive the LED.
Now, you could only use each bit once, so depending on your pot placement
would determine if you could find each bit uniquely high at each point along
the slider.  Might work in theory.

Now, a disclaimer...I understand how PICs work...but I have no clue how to
program them.

Jay

-----Original Message-----
From: simpits-tech-bounces at simpits.org
[mailto:simpits-tech-bounces at simpits.org] On Behalf Of Brian Sikkema
Sent: Sunday, December 02, 2007 8:40 PM
To: simpits-tech at simpits.org
Subject: [simpits-tech] Circuit question - plus another for Gene

Hey guys, quick q for ya.

I'm thinking of building a circuit, and basically
what I need is this: I have seven LEDs that need to
be lit up in sequential order as a linear pot is
moved. So basically as you slide the pot from one end
to the other, the LED's all light up (only one lit at
any given time) from one end to the other.

Idealy it could be adjusted so each LED lights up at
a specific resistance, as I need it to be a little
non-linear at spots - i.e. I for a couple, the pot
would need to be moved 1/2" to move on to the next
light, then for others it would only need to be moved
a 1/4".

Somewhat confusing, I know... but it seems like it
should be doable. But I'm no EE so I dunno how.
Simpler the better, though. Not looking to sink a
whole lotta money or time into this project.

As to my second question, Gene how thick are those
backlit panels you make? Do you think you could make
one roughly 1/8" thick, or would that be too thin?

Bria

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Thanks!