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Step 14: The Chatterbox - Part 2 - Velleman KA02 Audio Shield for Arduino - Recording the Audio Clips

Picture of The Chatterbox - Part 2 - Velleman KA02 Audio Shield for Arduino - Recording the Audio Clips
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This was purchased as a kit: CPC - KA02 Audio Shield

It is a digital recorder / playback device based on the ISD1700PY chipcorder.

The board has a built-in microphone to record messages. The shield has a 60 second total recording time and can be rewound, fast forwarded, and erased using small push buttons on the board. In this project, playback is via a speaker.

It uses the ICSP pins on an Arduino as a serial connection to the shield.

It also uses pin 10 on the Uno R3 board for control.

The selection and playback of audio recordings can also be controlled by a microcontroller, in this project the Elegoo Uno R3.

The construction manual for the KA02 including the full circuit diagram is available from the Velleman web site: Velleman KA02 Assembly Manual

Preparation

Assemble the KA02 kit and fit it to the Uno R3.

Connect the 8Ohm speaker to the audio board. I used two cut 'Dupont' wires that feature sockets that connect to the KA02 speaker pins.

Connect a USB cable to the Uno R3 and to a PC (to provide power to the Uno R3 and KA02).

Recording the Audio Clips

Using the on board microphone and the control push buttons record the audio clips as follows:

1. Press and hold the record button.

2. Say the first clip ("1 Cotton").

3. Release the record button.

4. To check the clip press the play button.

5. If not happy with the clip, repeat from step 1.

6. If all is OK, press the forward button to go to the second recording slot.

7. Press and hold the record button.

8. Say the second clip ("2 Eco Cotton")

9. Release the record button.

10. To check the clip press the play button.

11. If not happy with the clip, repeat from step 7.

12. If all is OK, press the forward button.

Repeat until all 14 audio clips have been recorded. The total available recording time is one minute.