Stack Exchange network consists of 177 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up.
So I bought a 10 pack of 4 x 6 cm perfboard. On two ends there is a row of pads without holes:
What are they used for?
I use them for edge-mounted strips of LEDs.
They might also fit a card-edge connector, although they are rather short for that.
They could also be used for edge-mount header strips.
Required, but never shown