This has been the most frustrating thing for me, as the schematic isn't very clear to me in correlation to the PCB itself:
The PCB itself isn't labelled with resistor labelling. My first assumption I'm pretty confident with, that the below pads are used to bypass PCA chip if one is not being used per MrMan's posts:
Given I am using the PCA chip I'm leaving these open.
This then left the PWM pads at the top of the board. There seems to be both 100R & 10K0 resistors in the schematic, but 1 set of pads. I couldn't figure out which resistors to solder here. I used the multimeter (another first for me!) to try and see what the pads were connected to. I got continuity between both the PCA pins as well as ground, which didn't help much. I made the assumption therefore (oh oh!) that the 100R resistors were to jumper/bypass the PCA chip and I needed to solder the 10K0 resistors to these pads as they had ground continuity
Now that the board is "finished", I was admiring my handywork, when I noticed for the first time on the back of the board:
Another set of pads! I looked through all of these posts again and saw that MrMan stated 0R resistors are used to bypass the PCA chip, which means I have a stack of as yet unused 100R resistors.
*insert sinking feeling here*
I assume therefore that these sets of pads need resistors soldering to them. The question then becomes on which side of the board do the 10K0 resistors go & which side do the 100R resistors go? I'm crossing all appendages that the answer is 100R go on the rear - in which case I'm sweet. I have a sinking feeling though that I've soldered the 10K0 resistors in the wrong spot and am going to have bucket loads of frustration correcting my error.....
Any and all advice appreciated!