RE: prizmacap9 Oct 2019 12:35
Claretjay, It is true to say, "energy will need to be harvested for the fingerprint reader" but the question is, is it acceptable for the fingerprint reader to "only" work while held against the terminal?
if the manufacturer of these cards decides it is, then there's a lot of money to be saved (from their point of view) by not fitting a super cap. I work in R&D and if we can save $0.02 in $25.00 by fitting a different component or only using 5 of something instead of 6 then that's what we do and so does the rest of the electronics industry. $0.02 multiplied up be 100,000's or 1,000,000 add up.
However, having said that if a selling point is a fancy display and multiple credit cards in the one card, which I seen bandied about online (not in real life) and fingerprint reading (stand alone) then I'd say a super cap would be essential.
Just my 2d.