Have you disconnected the mote from the battery? The correct arrangement is as follows:
Let the battery (power supply) terminals be "A" and "B" resistor terminals be "C" and "D" mote terminals be "E" and "F". Usually the battery and the mote would be connected: i.e., "A" is connected to "E" and "B" is connected to "F". Break the connection. In mica motes, the battery (box) is soldered on the PCB. You need to remove the solders and take the battery box out. Alternately (if you are not in a destructive mood), do not put any batteries in the battery box that is connected to mica mote. Instead, use a separate battery box and connect it to the mote's power supply pins using wires. Now attach "A" to "C", "D" to "E" and "F" to "B". Now place turn on the mote and connect your multimeter probes (in voltage reading mode) to points "C" and "D". Of course the description above can be paraphrased as "put the resistor in series". > On Thu, May 29, 2008 at 9:27 PM, Shomnat Mitra <[EMAIL PROTECTED]> wrote: > >> Hello , >> >> I have gone through several help archives to find a way to measure the >> current draw of the motes. >> >> All suggest using a 1 ohm resistor in series with the + ve terminal of >> the battery and the other end of the resistor attached to the PCB, >> and measuring the voltage across this resistor. >> >> The readings are 1.5V which is the battery voltage. >> I have tried several positions on the mote to attach the resistor, but >> none show any change. >> >> The reading also doesn't show any change when I use HPLPowerManagement in >> my programs. >> >> Is it because i am using a Multimeter ? >> >> Can anybody suggest the exact way to do this ? >> >> Thanks in advance , >> Somnath >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> > > > > -- > Dr. Saikat Ray > Assistant Professor > Department of Electrical Engineering and Computer Engineering > University of Bridgeport > Cell: 215-279-1032 > Office: 203-576-4165 > Web: http://raysaikat.googlepages.com -- Dr. Saikat Ray Assistant Professor Department of Electrical Engineering and Computer Engineering University of Bridgeport Cell: 215-279-1032 Office: 203-576-4165 Web: http://raysaikat.googlepages.com
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