Order Components
There are two off-the-shelf components that must be ordered in order to assemble the circuit board. The first is an Audio Jack, and the second is a Microswitch. There is also a Mono Audio Cable that will be needed later to connect the switch to a switch adapter.
Clicking on each of the components in the bill of materials (BOM) below will show suppliers they can be purchased from. If only a single board is being assembled, one of each part is all that is needed. The audio cable can be purchased in any length that is needed for the application. Cables of 0.9m to 1.2m are shown in the BOM as examples only.