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At 06:38 PM 1/1/2009, Ludwik, you wrote:
I would use a d.c. power supply (measuring I and U and
calculating the input energy as U*I*t).
Would the I and V readings be taken with an analog meter (+-5%)
or an inexpensive DVM (+-1 count and <1% often)
and an inexpensive DC power supply ( ripple +- 3%), I wonder, Ludwik?
:-)