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Description
This is a very simple walk threw on a common problem ... measurement of current
i made this entirely in eagle CAD so i have no spell checking in there so just put up with it XP
next will probably be operational amplifiers or voltage measurement unless you have another idea
i made this entirely in eagle CAD so i have no spell checking in there so just put up with it XP
next will probably be operational amplifiers or voltage measurement unless you have another idea
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2507x6921px 202.08 KB
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Comments7
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Looks neat 
You mention voltage measurement for the next article, I was wrangling with a problem a short while ago: measure a resistor of a known value that can vary +-5% (strain gauge) using a 0-5V analog sensor (10-bit analog on Arduino) using the minimum amount of soldering possible. Rather than use a voltage bridge which would only use a small fraction of the 0-5V range, I wanted to boost the signal to use the full range. Ended up with an op amp, three resistors plus the sample resistor that's being sampled, plus 5V and 2.5V voltage sources. Not the typical solution I'm sure, not sure if you've dealt with similar restraints on your projects.
You mention voltage measurement for the next article, I was wrangling with a problem a short while ago: measure a resistor of a known value that can vary +-5% (strain gauge) using a 0-5V analog sensor (10-bit analog on Arduino) using the minimum amount of soldering possible. Rather than use a voltage bridge which would only use a small fraction of the 0-5V range, I wanted to boost the signal to use the full range. Ended up with an op amp, three resistors plus the sample resistor that's being sampled, plus 5V and 2.5V voltage sources. Not the typical solution I'm sure, not sure if you've dealt with similar restraints on your projects.