- Wed Aug 04, 2010 5:25 pm
#106682
Hi,
I am rather new to this - but I was wondering what a good approach would be to wire up a Non-invasive AC current sensor (http://www.seeedstudio.com/depot/noninv ... Path=84_91) using an Op Amp to get an output voltage range between 0-3.3 volts.
I know that I can use resistors, etc. to convert to a voltage (have found some nice examples), but I have understood that an Op Amp would be a 'cleaner' solution, I just am not sure where to start looking for a design ..
Could I just use something like the sparkfun board http://www.sparkfun.com/commerce/produc ... ts_id=8883 which uses the ACS712 and then pumps it through an op-amp (if I understand correctly) .. my concern here is resolution and the 5v requirement of the ACS712 (I only have 3.3v <- using a JeeNode)
anyhow, suggestions, directions where to look, etc. would be much appreciated.
Thanks & kind regards,
Jake.
I am rather new to this - but I was wondering what a good approach would be to wire up a Non-invasive AC current sensor (http://www.seeedstudio.com/depot/noninv ... Path=84_91) using an Op Amp to get an output voltage range between 0-3.3 volts.
I know that I can use resistors, etc. to convert to a voltage (have found some nice examples), but I have understood that an Op Amp would be a 'cleaner' solution, I just am not sure where to start looking for a design ..
Could I just use something like the sparkfun board http://www.sparkfun.com/commerce/produc ... ts_id=8883 which uses the ACS712 and then pumps it through an op-amp (if I understand correctly) .. my concern here is resolution and the 5v requirement of the ACS712 (I only have 3.3v <- using a JeeNode)
anyhow, suggestions, directions where to look, etc. would be much appreciated.
Thanks & kind regards,
Jake.