Re:STM32 Open Source Multimeter
by ur-whale on Friday June 21, 2019 @01:36AM
(#20240120)
If this project actually pulled it off properly (haven't dug deep enough to be sure), I really like the ability to measure current and voltage simultaneously: this is the one thing I wish a fluke-level DMM could do.
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The measurement methods for current and voltage are different. Current is usually measured by inserting a small resitor in the circuit and measure the voltage over the resitor. You would need at least three cables to measure both current and voltage simultaneously. And the SMT32 would need to do (alternating) measurements on two voltage channels.
Re:STM32 Open Source Multimeter
by magicalhippo on Friday June 21, 2019 @07:16AM
(#20241483)
> And the SMT32 would need to do (alternating) measurements on two voltage channels.
The STM32 part used in this project has two ADCs that can be triggered simultaneously, so you can actually do two readings at once.