How to read audio jack switches and schematics?
Christopher Pierce
Published Apr 05, 2026
How to read audio jack switches and schematics?
When looking at a seemingly simple audio jack datasheet, you will often find an array of schematics with a variation of switches and connections. In this post, we are going to look at how to read these schematics, describe the various switch types available, and discuss how they are implemented in audio applications. What is a Switch?
Where is the mating plug on an audio jack switch?
It would typically be referred to as a “tip switch” since the switch is located on the “tip” terminal. Now again, we visualize the mating plug being inserted from left to right. When the tip makes contact with terminal 2, it pushes this spring away from terminal 10 making the contact “open” between these terminals.
How is a SPDT switch connected to an audio jack?
In this example, terminals 4~6 are electrically independent of the audio signals 1~3. This utilizes a SPDT switch in which terminals 4 and 5 are connected in the un-plugged state, and then terminals 5 and 6 would be connected in a plugged state.
What makes a force sensitive hookup more sensitive?
Another key characteristic of the FSR is it’s rated sensing range, which defines the minimum and maximum amounts of pressure that the sensor can differentiate between. The lower the force rating, the more sensitive your FSR hookup has the potential to be. But!
When looking at a seemingly simple audio jack datasheet, you will often find an array of schematics with a variation of switches and connections. In this post, we are going to look at how to read these schematics, describe the various switch types available, and discuss how they are implemented in audio applications. What is a Switch?
It would typically be referred to as a “tip switch” since the switch is located on the “tip” terminal. Now again, we visualize the mating plug being inserted from left to right. When the tip makes contact with terminal 2, it pushes this spring away from terminal 10 making the contact “open” between these terminals.
In this example, terminals 4~6 are electrically independent of the audio signals 1~3. This utilizes a SPDT switch in which terminals 4 and 5 are connected in the un-plugged state, and then terminals 5 and 6 would be connected in a plugged state.
