Dave takes a look at how to optimise the low burden voltage multimeter design from PART 2 to eliminate some parts.
And explains the µCurrent shunt circuit design and how that applies to this new optimised design.
It's basically a practical tutorial in circuit design optimisation.
Then another design variation is presented using MOSFET switching that eliminates ones of the HRC fuses and the amplifier, and still lowers the burden voltage yet again!
PART 1 is here:
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