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Author Topic: Voltmeter trouble  (Read 1949 times)

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Offline House91320Topic starter

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Voltmeter trouble
« on: June 10, 2011, 12:24:54 am »
I just built a voltmeter and its doing something that doesn't make any sense. i am using the refrance from the data sheet http://www.intersil.com/data/fn/fn3082.pdf and i am using a 7660 to generate the -5. the problem i am having is the device is building up a voltage and according to the datasheet it shouldn't and any voltage i put in maxes it out.
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Offline House91320Topic starter

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Re: Voltmeter trouble
« Reply #1 on: June 10, 2011, 12:53:29 am »
I have figured out the problem its setup for 200mv is there any way to add a resister to allow  it to measure 20v
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Offline House91320Topic starter

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Re: Voltmeter trouble
« Reply #2 on: June 10, 2011, 02:16:29 am »
i added a divider an it fixed it
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