Monitor Meter
Monitor Meter
how do i build an electronic energy meter?
I wanna build a prepaid system for electrical energy monitoring and metering... but dunno how and where to start
i need the circuit and more detailed stuff as i'm a beginner
Quite frankly, as a beginner I would choose a somewhat less challenging project...! I know how to build parking meters and trust me, the coin/bill (or credit card) recognition alone is already quite a feast.
As for the power consumption measurement itself, an electronic solution would sound something like that:
You start with a current transformer (few very thick wire windings on primary / many thin wire windings on secondary) with primary in series to the "paying customer's supply line".
The secondary side gets rectified, and that signal goes into a A/D converter. That digital output goes into a microprocessor (or PIC) which sports a "real time" base. A suitable software program can then "count" how many Ampere were flowing within a a certain time (used as a direct function to "energy being used). The microprocessor has also been "told" by you via digital inputs and yet more software how much "credit" that user has, so if that credit is used up, then one of the processor outputs - via a current amplifier (darlington transistor) and a very strong relay (100 Amp contact rating) shuts the user's power off.
Still want to do it?
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