It depends entirely on your needs. If you need to power both circuits
simultaneously, then (obviously) you need to connect power supply and
return (it's not ground unless it is really attached to the safety
ground somewhere) to both simultaneously. If they are always going to be
operating separately but always both populated, then it might be wise to
have two connectors (one for each side.) If only one side of the board
is to be populated (I don't remember the original post) then connecting
to both simultaneously would make sense, unless power routing for one
side would be compromised by this decision.
HTH,
Donald.
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On 2020-11-13 1:11 p.m., Dave wrote:
Harvey,
? I have a related question here after spending some time researching. I
already have a bunch of JST XH connectors and plugs, and pins and the
crimper. I wanted to design a total SMT pcb and I could solder the power
and ground wires to a pad. Then I thought about adding a JST header and
use a plug for power and ground. Problem is, the JST parts are all
through hole. So now for my question ( I may have a clue but will ask
anyhow to verify ), what is the best method on the board design to use
through hole and SMT at the same time? Will I still be able to do my
planned 2 different circuits on either side of the board? How should I
handle the power header? Use it to supply both sides of the board with
one header or use 2 headers for power/GND and separate the copper with
islands?
Thanks,
Dave
