5935

Circuit and description published in Elektor Media & Learning of May/June 2026. 2 Arduino Uno shields provide an oscillator, an attenuator and a detector, all under Arduino Serial or CLI control. Control and readout can be automated using e.g. a shell script.

This circuit is capable of generating sine waves of a specific frequency and amplitude.
These waves can be fed to an audio device-under-test.
From the output of the device-under-test the response amplitude is measured.
The audio response meter is controlled via simple commands via the Arduino IDE serial interface.
Readout of the resulting detected amplitudes is also done via the Arduino IDE serial interface.
Linux scripts for fully automated measurements are provided.