Pinouts
In some applications, the PC speaker is affixed directly to the computer's motherboard; in others, including the first IBM Personal Computer, the speaker is attached by wire to a connector on the motherboard. A wired PC speaker connector may have a two-, three-, or four-pin configuration, and either two or three wires. The female connector of the speaker connects to pin headers on the motherboard, which are sometimes labeled SPEAKER or SPKR.
Pin Number | Pin Name | Pin Function |
---|---|---|
1 | -SP | Speaker negative |
2 | None (unwired) | |
3 | GND | Ground |
4 | +SP5V | Speaker positive |
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