Description
Module with amplifier LM386M, speaker and two high precision potentiometers, that allows you to check external converters analog-to-digital and digital-to-analog. The system has two analog outputs, controlled via potentiometer and one input connected through the amplifier to the speaker.
Key features
- Built-in amplifier LM386M (documentation) for lifting signal power with an external DAC or MP3 player. The output of the amplifier is connected through the internal speaker.
- Two potentiometers high accuracy with output voltage adjustment in the range from 0 V to 3.3 V two channels that can be connected to the converter analog-to-digital of any microcontroller, e.g. Arduino.
Connection
The module has soldered goldpin connectors, raster 2.54 mm. Description of the inputs is given in the table.
| Pin | Description |
|---|---|
| 3.3 V | Input voltage 3.3 V power supply for potentiometers |
| GND | The ground of the system. |
| ADC2 | Output voltage is adjustable with a potentiometer from 0 V to 3.3 V. |
| ADC1 | Output voltage is adjustable with a potentiometer from 0 V to 3.3 V. |
| AIN | Input voltage to the amplifier and then to speaker. |
| NC | Must be left not connected. |
| +5V | Input voltage 5 V the power dynamics. |
Useful links |
