Internal speaker

Pinout

Both versions have a similar layout for the pins you need to use. In the H1, the connector might not be populated and look like this:

On the H2, normally the connector and cable is included as seen here:

For both versions, you need a small speaker. Typically a laptop speaker will work, for example: https://s.click.aliexpress.com/e/_dWBRFr2

Connect SPK+ and SPK- to the speaker and use double sided tape to fix it to the PCB.

Tests of the speaker: https://www.youtube.com/watch?v=XkaGV9muvbg

Additional details

A speaker has two wires, SPK+ and SPK-. While there is no sound, the speaker floats on a magnetic field in the middle of its range. When SPK+ is high the speaker moves forward. When SPK- is high the speaker moves backwards. The distance forward and backwards depends entirely on the voltage level.

On the PortaPack, the speaker connector has 3 pins.

SPK+ is the pin nearest to the edge of the board GND is the connector in the middle, skip it SPK- is towards the centre of the board

H1 specific setup

On the H1, when you add the new speaker you may find that there is no audio. By default the speaker is disabled.

To enable the speaker:

1. Settings
2. UI Settings
3. Ensure Hide H1 Speaker option is disabled (a red X)
4. Click Save

Now a speaker icon will be present on the top line of the display. If the icon has an X it is muted. You can click on it to unmute, it will turn green.