PPCB ProtoBoard holes under breadboard spots

[genXslacker]

There are nine holes under each of the two spots for the breadboards. Are these intended for standoffs?

Documentation

 

[Robert]

They were originally intended for attaching the breadboards with small screws.

They should line up with mounting holes underneath the adhesive layer on MB-102 breadboards.

 

[genXslacker]

They were originally intended for attaching the breadboards with small screws.

They should line up with mounting holes underneath the adhesive layer on MB-102 breadboards.

I had no idea. I guess I never had the occasion to remove the adhesive before. Thanks!

 

[spi]

I just used the adhesive and stuck them to my protoboard--screws not needed

 

[Robert]

The first versions had exposed pads under the breadboards that made contact with the power rails. The voltage for each breadboard rail could be set with removeable jumpers, rather needing jumper wires.

The breadboards needed to be tightened down evenly to make contact and it was overall more trouble that it was worth so the idea was scrapped but the mounting holes were never removed. I figured they would make swapping the breadboards easier than using the adhesive backing.