Correct . But I didn ' t specifically mean that . He was on the whole kept in dark by his ministers . <| sep |> I do wonder why , given how many options we have now . Rails has an asset pipeline by default , Python apps can benefit from webassets , and Node . JS options are far too numerous to count . <| sep |> no , thats not right . when we use a language it means that it has meanings then how English does not have meaning . <| sep |> Brush wash lolI use some random stuff for humidity but that ' s it <| sep |> Nowhere near enough information , sorry . Do you mean ac or dc ? What sampling rate do you need ? What voltage will the circuit be at ? Does it need to be medically safe ? Does it need to be prebuilt or are you looking for circuit ideas ? There ' s a great difference in measuring , say , ac mains leakage current , impressed currents in human skin , corrosion currents in a corrosion pit , rf waveguide current distribution , to name but a few . As you seem to be looking at websites that tend towards Arduinos and Raspis , etc the solution may be as simple as series resistor and an AD converter . Or as buying a certified calibrated 8808 A Digital Multimeter and taking measurements from that .