I've managed to get myself thoroughly confused now.

Given the following diagram for a dip switch, which way is up / on?

enter image description here

Do you read the above as:

  • 1 = On
  • 2,3,4 = Off

or as:

  • 1 = Off
  • 2,3,4 = On
  • \$\begingroup\$ read both ways until further information reveals the correct choice ... if further info is unavailable then choose 1 is OFF \$\endgroup\$
    – jsotola
    Sep 26, 2021 at 16:36

1 Answer 1


The small white square within the black opening is the part of the switch you slide, so white upward is on.

1 is off. 2,3,4 is on.

I have also seen the black and white used in the opposite way, where the small square is black in a white opening.

  • \$\begingroup\$ The first part would be an answer... if only you did not say exact opposite in the next sentence. As it is, it basically means "I have no idea" \$\endgroup\$
    – Maple
    Sep 26, 2021 at 15:55
  • \$\begingroup\$ @Maple. I was saying that the black/white isn’t important, it is the small square that indicates the position of the switch. \$\endgroup\$
    – HandyHowie
    Sep 26, 2021 at 19:38

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