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How to measure current? (ADC08034 interface to the AT89C52)

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Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph

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ExperimenterUK

Wed Aug 27 2008, 08:51AM

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Joined: Tue Aug 05 2008, 04:15PM

Posts: 126
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Arun Kumar V wrote ...

what do you call this connection ? ( i have marked ) high side or low side sensing ?

I think it's "Other side sensing"

To be fair it looks like a valid method,
although the voltages marked are wrong.

Your sense voltage should be more like 0.5 volts
and the opposite polarity( I think

).

>but i cannot get the output in AC form.
Why do you want AC ?, it's a DC circuit, expect DC output

Why are you using 50 Volts ?
such a high voltage is likely to cause problems.

[ Edited Wed Aug 27 2008, 04:26PM ]

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christie

pdi33

Wed Aug 27 2008, 08:54PM

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Joined: Mon Jun 04 2007, 09:28AM

Posts: 618
Thanked 134 times in 130 posts

hi christie,
ur ciruit looks perfectly o.k. except for the voltage levels ( just like experimenterUK said) and the output voltage u get would be of -ve polarity. Now this is not recommended as the op-amp is operating on a single +ve supply so u may possibly not get a valid -ve output on pin 6 of the op-amp. So i strongly suggest u interchange the Vin+ and Vin- inputs of the op-amp and generate a +ve DC signal at the output.

* inspired to develop,developing to inspire *

This post has been thanked 1 time

christie

Arun Kumar V

Thu Aug 28 2008, 12:37AM

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Joined: Sun Jan 28 2007, 11:50PM

Posts: 427
Thanked 178 times in 149 posts

I think it's "Other side sensing"

i used High side sensing and Low side sensing but "other side sensing" is new to me, LOL

Arun

[ Edited Thu Aug 28 2008, 12:38AM ]

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