LM3914 - Expanded Scale Voltmeter - Help!

Thread Starter

joe426

Joined Aug 11, 2009
39

Thread Starter

joe426

Joined Aug 11, 2009
39
Hello,

Did you download the datasheet?
On page 9 there is an example how to expand the range.

Bertus
Yes, I've thoroughly looked at the documents I linked to above. They're really poorly written in my opinion and I'm having trouble following them (hence why I asked for help).

What is you supply voltage?
I have two available rails. ~9v and 5v.
 

Thread Starter

joe426

Joined Aug 11, 2009
39
Dave Jones from EEVBlog made a really great tutorial about a battery tester using a LM3914. It's on Youtube.
Link.
Yeah, I linked to that video in my original post. He does a good job overall, but is still confusing about customizing a range.

Isn't there a simple set of equations with resistor values? I don't see why this is so difficult. :confused:
 
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