Module with loudspeaker for testing A/C and C/A converters - Waveshare 3972

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

• The website of the manufacturer: Waveshare
• User guide Wiki
• Diagram of the module
• Exemplary program
• Documentation of the IC LM386