Hi Mick,
Yes Paul has already clarified that point with me. As I am
currently reviewing which controller to update to for my 1-wire (and
other) projects the RaspberryPi3 was on my mind and I equated RPi3 with
that. Apologies for any confusion.
Regards
Joe P.
On 7/3/19 6:04 am, Mick Sulley wrote:
Hi Joe,
Crossed wires I think (forgive the pun). I believe Paul is talking
about the Sheepwalk Electronics RPi3 adapter, which is an 8 bus 1-wire
hat for the Pi, rather than the Pi itself. It is the RPi3 that I am
using.
Mick
On 04/03/2019 23:54, joep wrote:
Hi Paul,
Like Mick I am not an expert in electronics - just know enough to
get out of trouble when that happens.
I've checked several schematics of RaspberryPi 3 boards and could
not locate any DS9503 on them.
The DS9490R (USB_to_1-wire adaptor) however does have a DS9503
protection unit on its single 1-wire channel. So if Mick is using one
of these he needn't worry about adding one. If he's driving the
1-wire bus directly from a microcontroller of some sort then that's a
different matter.
Regards
Joe P.
On 1/3/19 5:13 am, Paul Everett wrote:
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
<mailto: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
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