A viewer found an EMC issue with the Keysight U1272A multimeter
Dave confirms both conducted and coupled issues and finds some spooky action at a distance!
Comparisons with other meters confirm they don’t have the same issue.
Fluke 87 GSM Prob[...]
How does a high voltage differential probe work? How is it safe? Is it isolated? A teardown and some reverse engineering of the Lecroy AP031 25MHz HV Differential probe. a.k.a Sapphire Instruments SI-9001 Forum HERE
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 tu[...]
Mailbag time again.
Dave’s first multimeter hack!
Sinclair PDM35 Multimeter
Russian analog multimeter
Canyse 801 data logger
Kickstarter Masso CNC Controller
Lumintop Prince 1000 lumens flashlight torch
Lumintop micro USB[...]
Dave looks at the current measurement front end of a typical multimeter and figures out how to redesign it for lower burden voltage.
It’s not quite as easy as you might think, there are comprimises and traps for your players.
And something you[...]
What is an oscilloscope?
What is it useful for?
How is it used?
What is the difference between an old school analog and a modern digital storage oscilloscope?
Rigol DS1054Z is a good basic digital scope
How not to blow up your oscilloscope VIDEO