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Unread 07-02-2003, 10:48
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Re: parts

Quote:
Originally posted by CHSguard72
I sort of understand what's going on here. Since schools are closed today due to the northeastern snow storm, I will run to radio shack today and pick up the electronics to build a couple of these circuits. If I take this schematic to radio shack, will they be able to help me find everything that I need? You mentioned getting the right op-amp. Which specific kind will I need? ie, what specifications should it have?

One last thing, I am planning on calculating the current for 2 motors, not just 1. Will I have to build 2 seperate/identical circuits and hook them up completely independently? Or can I use this single circuit for measuring 2 currents from different motors?

Thanks for all your help!

No, I don't believe that Radio Shack will have the particular OP-AMP I used. I bought it at DigiKey. (LM6134)

Note that each of these OP-AMPs packages have 4 OP-AMPS in them...so you can measure motor currents on four motors with in of these packages, (Radio Shack may sell an OP-AMP that has similar characteristics.....but I am not sure. They tend to seel pretty "jelly-bean" devices.)

-Quentin
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