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Unread 11-01-2003, 21:02
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Re: Current Monitoring system questions

You will notice that alot of teams measured across calibrated lengths of wire, or even placed very small value resistors in series.......we just measured the voltage drop across the circuit breaker and multiplied by different coeficients for 20A and 30A breakers.

Simple...and works great.

We used it in the stamp code to detect stalled drive motors...where we modulated them to keep the breakers happy.

We also used it to detect another motor stall, and used it as a limit switch. (end of travel instead of a nasty microswitch that always gives p the ghost that the most inopportune time)

I can pass along schematics if you are interested.

-Quentin

Quote:
Originally posted by PyroPhin
hello, gots some questions on something im developing for the 2003 bot

my idea is to have several taps on the motors/compressor to record all the voltage levels of them and send that data into the RC.. then put it thru the V= i*r formula to get the current of a particular device. i figured the R of the wire isnt gonna change that much in a 2 minute compeition, so im pretty well off setting that as a constant.

then the other half is getting one of the BS2's we got laying around to talk to the Dashboard port of the OI and send the stuff across to be displayed on a LCD mounted in the comtrol system.

i know how to do all of the programming for this.. minus the communication part. every time i have tried to duplicate the Serin command used in the RC, i get a stamp error.. so i can only assume that the form they use is for IFC stuff only.

well, if you have any suggestions... please drop me a line!

~PyroPhin
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