Designing power consumption meter

Thread Starter

evios

Joined Nov 9, 2008
29
I was having my project on Automatic Meter Reading. The part on the power meter really cause a big problem for me as measurement cant be taken easily although the hardware is well configured with LCD, however i still need to make a simple power consumption meter for my own using PIC.

I'd asked my supervisor opinion, and he suggest me with PIC. Does anyone can provide me with a detailed circuits that may works? PIC act as a controller, whenever PIC sense 0V, it will not starts measuring, else it will and keeps accumulating the power consumptions (can be in voltage and current). I might needs some help and guidance from all the experts here.

Thank you so much
 

BillO

Joined Nov 24, 2008
990
Evios, why ask for finished solutions to your problem? What will you learn or accomplish from that?

Power comsumption is energy used, watt-hours.

Can you design a PIC based system that can measure current (A) and voltage (V)?

Power (Watts) are given by V*A

Power consumption (Watt-hours) is given by V*A*time

Sample the voltage and current on a frequent basis (maybe every hundreth of a second, or whatever) and multiply by the time base in order to do a piece-wise integration. Accumulate (add it up) over an hour and calculate the Watt-hours used in this fashion.
 

John Luciani

Joined Apr 3, 2007
477
Texas Instruments has a few power meter applications notes for the MSP430.
They may also even have a reference design. Even if you don't use the MSP430
you may find some useful information there.

(* jcl *)
 

Thread Starter

evios

Joined Nov 9, 2008
29
Evios, why ask for finished solutions to your problem? What will you learn or accomplish from that?

Power comsumption is energy used, watt-hours.

Can you design a PIC based system that can measure current (A) and voltage (V)?

Power (Watts) are given by V*A

Power consumption (Watt-hours) is given by V*A*time

Sample the voltage and current on a frequent basis (maybe every hundreth of a second, or whatever) and multiply by the time base in order to do a piece-wise integration. Accumulate (add it up) over an hour and calculate the Watt-hours used in this fashion.
Well, I might have over request for that. Because I starts everything from nothing, causing me a bit over for it. Well, I need it as references for the circuits, because my major part is not on that, mainly on the RF. Well anyway, thanks for your explanation too.

Texas Instruments has a few power meter applications notes for the MSP430.
They may also even have a reference design. Even if you don't use the MSP430
you may find some useful information there.

(* jcl *)
Well, thanks for that. I will look further for it.
 
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