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It's attractive to me.
How can I realize it?
1. Which MCU is recommended at which platform (EVB)?
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Any of the ARM processor cores are very good.
For example, ST just released a ARM core with a single-precision floating-point unit (TI and Freescale also have similar parts). This STM32 kit was being given away last week, but it looks like the link for the free kit is gone now;
http://www.st.com/internet/evalboard/product/252419.jsp However, the board is $20
http://parts.digikey.com/1/parts/2484058-eval-kit-stm32f-discovery-stm32f4discovery.html So its close to free :)
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2. How to utilize it's ADC for power measurement?
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You need to figure out what is the minimum current you need to measure, and at what accuracy. You then need a current sensing circuit and an amplifier (op-amp) to increase the signal level. Sometimes the current-sensing circuit is built using op-amps.
If you have never used op-amps, read the TI reference book from Ron Mancini called "Op-amps for everyone";
http://www.ti.com/lit/an/slod006b/slod006b.pdf eg., p193 Chapter 12 Instrumentation: Sensors to A/D Converters.
There are 'current sensor' circuits that incorporate the op-amps and logic. You'll have to look around TI, Analog Devices, Linear Technologies, etc web sites.
Cheers,
Dave
Honored Contributor
