Dear All,
Good Day!
I am using voltage sensor to measure the battery voltage in my product and it is working fine.
I am curious to know why all the voltage Sensor breakout board has circle with holes on the PCB & what is it's purpose?
Experts please clarify it would be helpful for many of us.
Thank You in advance.
Regards,
Viknesh Vadivel
This is for putting a screw through to mount it.
All the vias around it suggest its a footprint designed for high current, perhaps the matching current
sensor uses the same footprint? For a voltage sensor its not needed - I presume its connected to
ground.
I think it is just bling-bling to make it look interesting. After all, it is only two resistors as a voltage divider. To sell that as a "Voltage Sensor" needs some extra bling-bling 
I vote for “ bling-bling”.
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