On 09/08/2016 09:56 AM, Florian Rist wrote: > Hi Jon > >> Yes, I thought about building a receiver out of various >> parts, but there are application specific parts that combine >> all this in one unit. Most are made with 38 KHz band pass >> filters for VCR remote controls, > Yes, that's why I didn't even look into theses integrated devices. > >> but the QSE159 does not >> have the BPF, looked to be sensitive enough, and was really >> cheap ($1.06) > Indeed, interesting. > > Not sure if it is sensitive enough, 0.25 mW/cm² worst case translates to > 2.5W/m², that's quite a lot. But, now that I started looking, there are > quite a few similar integrated devices available, some with much high > sensitivity down to at least 10µW/cm². However most are lacking the > Schmitt-trigger of the QSE159, nice part, that you found, I'm going to > get one, too. > > I have no idea what the radiated power of the Blum probe is, but it has 12 big surface-mount LEDs arranged around the periphery. The QSE sensor picks it up very well out past 6", which is all the sensitivity I will need.
Jon ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
