# Shock switch

![](https://451694785-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MPda5vaSVRKTQ6AoAmb%2Fuploads%2Fgit-blob-c406b6e9607c84837081fe7a6f5f872e3be5917c%2Fimage.png?alt=media)

A built-in 10 K ohm resistor is connected between the centre pin and the ‘S’ pin and can be used as a pull up or pull down resistor. The switch contacts connect to the two outer pins.