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Old 20th July 2004, 02:45 AM   #1
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Default Digital Multimeter

Hi, this is the first time I posting. Do any of the guys here have any schematics on digital multimeter? I am doing a school project on it and have no idea how to start. If you have the schematics plus the program( that will be the best!!), could you send it to me at I am only use it for reference and something for me to start with. Thank you for reading the post and hope to hear form you guys soon.
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Old 20th July 2004, 10:34 AM   #2
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Do you only need to measure voltage?
Using a pic that has an inbuilt ADC would be an easy option, not highly accurate but it would be enough for a first attempt.
Measuring currect requires a shunt and a ADC (measuring voltage drop).
For resistance I think you need to measure current for a constant voltage source (somthing very small).

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Old 20th July 2004, 02:56 PM   #3
x-pro is offline x-pro  United Kingdom
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Have a look for instance here:

for MAX1497 and MAX1499 chips.

There are some circuits in the datasheets.


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