Quote:
Originally posted by Chipawa
I checked a spec sheet on the current transducer. The drive current required for one sensor would be less than 60 mA for my application. I would think that powering both sensors off of pin 1 would work so long as I'm not breaking any FIRST rules by doing so.
and if I can avoid custom circuits......
-Chip
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You'll be fine then running a BUNCH of them off of the gyro power pin.
BTW, though they don't
feel like it, the LEMs
ARE considered "custom circuit components", so be careful the total cost for them doesn't exceed the $200 limit. If I remember correctly, they're about $25 each, so you can have something like 7 or 8 max if you do NOTHING else.
(BTW, If you wish to use say 8 of them, but it would take you slightly over budget, and buying 10 gives you a price break, consider buying 10. Then you have a couple "spares", and can take advantage of the "prorating" rule on quantity purchases to maybe sneak that 8th one in...
)
Also, be careful where you run high current wiring to insure they're not interfered with electromagnetically, especially if you're using a BUNCH of them. As you can see in the original CDF app note using them, the two parallel "current splitting" wires are kept quite far from the LEM body. The BUD case was also helping to keep OTHER wiring physically away from it.
- Keith