Hi Mick, I’m not sure if you have any other masters but your RPI3 boards already have a DS9503 on each channel.
Paul > On 28 Feb 2019, at 14:14, Mick Sulley <m...@sulley.info> wrote: > > I know this is a very basic question, but my electronics knowledge is not > great. > > Following on from recent discussions re adding DS9503 to increase reliability > I am trying to design a PCB for them. Looking at the diagram on page 2 of the > spec sheet (https://datasheets.maximintegrated.com/en/ds/DS9503.pdf) > > <DS9503cct.jpg> > > my understanding is that pin 1 is the signal line out to the devices, pin 2 > is the ground to devices, pin 5 is the ground to the adapter and pin 6 is the > signal line to the adapter. > > I assume that I need to add the two 5 ohm resistor at pins 1 and 2. Also > there is no need for a resistor in the 5v line? Like this - > > <DS9503MyCct.jpg> > Is that correct? > > What power rating resistors are needed? > > Thanks > > Mick > > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers
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