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LED bargraph
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Please be positive and constructive with your questions and comments.

LED bargraph

by Hfuy on Fri Nov 19, 2010 6:58 am

Hi,

Does anyone make anything like the LM3914 bargraph voltmeter that's available in a package such as SOIC? The only ones I can find are DIL or (strangely) PLCC. Let's face it, PLCC is for EPROMs...

I have googled, didn't find much.

Thanks,

-H
Hfuy
 
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Re: LED bargraph

by some_call_me_tim on Fri Nov 19, 2010 1:40 pm

You could roll your own with a couple of quad opamps such as LM324s (which you can get in just about any form factor you wish).

So, why the aversion to PLCC?

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Re: LED bargraph

by Hfuy on Fri Nov 19, 2010 2:20 pm

Only because, by the time you have it in a socket, it's probably bigger than the DIP. Yes, you can build one, but then it's opamps, a precision reference, a (fairly precision) resistor ladder, it's a lot of bits and pieces.

Probably no real problem with doing it in DIP, it's just got to fit in a battery pack. And I usually try to avoid SMT!

The alternative seems to be an ATtiny and some software, but it seems like such a ridiculous degree of overkill for a voltmeter.

H
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Re: LED bargraph

by some_call_me_tim on Fri Nov 19, 2010 5:22 pm

You don't need to mount PLCC in a socket. I will admit not the most friendly for hand-soldering but it would still save some room.

Hopefully someone else will know of a different solution.

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Please be positive and constructive with your questions and comments.