Grove - Recorder v2.0

Introduction

3.3V 5.0V Digital

Grove - CRecorder v2.0 is a upgraded recorder with enriched features. It can record 8-20 seconds[1] audio with high-quality and natural voice. In addition, it also gets sound volume control and playback functions. With MCU such as Seeeduino or Arduino board, you can prototype various applications quickly with user-friendly interfaces.

[1] Recording time could be customized(if you require) by replacing different resistor the solution to do this will be described in later sections.

Version Tracker

Product revision Release date Support status Notes
V1.0 Apr 2014 Supported -
V2.0 Oct 2015 Mainstream support
  1. Add speaker volume controller.
  2. Add NS8002 amplifier to enhance power.
  3. Add Rec pin Switch for switch Rec pin.

Features

  • Easy-to-use with sound volume control, record, playback functions and grove interfaces.
  • Easy to be programmed for plenty of applications with MCU.
  • Automatic power down mode, variable recording and playback duration, non-volatile storage.
  • Low power consumption.
  • Shipped with a speaker (8Ω/2W).

Tip

More details about Grove modules please refer to Grove System

Application ideas

  • Toys.
  • Alarm.
  • Short-duration-echo required applications.

Specifications

Parameter Value
Operating voltage 3.3~5.0V(DC)
Ripple(at Max power) ≤ 50mV
Recording duration(default) 12 seconds(MAX value)[2].
Playback duration(default) 12 seconds(MAX value).
Sample rate 53 kHz
Chip ISD1820PY(Datasheet), NS8002(Volume Amplifier)

Platforms Supported

[2]You can replace the resistor shows as following to change recording duration.

Red rectangle marked area

Note

Playback duration will be same with Recording duration as it changes. Different kinds of resistor will lead different Recording duration as the following table shows.
ROSC Duration Sampling Frequency Input Bandwidth
80 KΩ 8 secs 8.0 KHz 3.4 KHz
100 KΩ (default) 10 secs 6.4 KHz 2.6 KHz
120 KΩ 12 secs 5.3 KHz 2.3 KHz
160 KΩ 16 secs 4.0 KHz 1.7 KHz
200 KΩ 20 secs 3.2 KHz 1.3 KHz

Hardware Overview

Grove interface

Connect main control board such as Seeeduino board with Grove - Recorder.

Speaker interface

Connect Grove - Recorder with speaker.

Rec shaft

Start recording.

Volume control interface

Control volume for speaker.

MIC

Microphone for recording.

IDS 1820PY

Microcontroller.

Running indicator

Light on while you are recording. Light out as you stop recording or recording time exceeds record duration.

Rec pin Switch

You can switch Rec pin ON/OFF, so you can disable or enable MCU controlled recording.

Grove wire

Connect main control board with driver board.

Speaker

Parts list

Parts name Quantity
Grove - Recorder v2.0 1 PC
Grove wire 1 PC
Speaker 1 PC

Get started

Materials required

Preparations

Refer to the following guides to build a appropriate IDE:

Note

We have used Seeeduino in this case.

Getting Started on Windows

Getting Started on Mac OS X

Hardware connections

  • Connect all modules as above figure shows.
    • Grove - Button > D2
    • Grove - Recorder > D7

Software Work

Test code as below, copy to your Arduino IDE, then click Upload(CTRL+U) to upload code to your Arduino.

// demo for Grove - Recorder
 
const int pinButton = 2;
const int pinRec    = 7;
 
 
void setup()
{
    pinMode(pinButton, INPUT);
    pinMode(pinRec, OUTPUT);
}
 
void loop()
{
    if(digitalRead(pinButton))      // button pressed
    {
        digitalWrite(pinRec, HIGH);
        delay(200);
        digitalWrite(pinRec, LOW);
        while(digitalRead(pinButton));  // until button release
    }
 
    delay(10);
}

Test it

  • After connection works and software works finished, press shaft Rec to start recording.
  • Then press button on Grove - Button to playback.
  • You can also adjust volume with Philip screw driver.

Resources

  • Schematic file in Eagle format
  • Schematic file in PDF format

ArduinoWioBeagleBoneRaspberry PiLinkIt ONE

Caution

The platforms mentioned above as supported is/are an indication of the module's hardware or theoritical compatibility. We only provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library / demo code for all possible MCU platforms. Hence, users have to write their own software library.

Help us make it better

Thank you for choosing Seeed. A couple of months ago we initiated a project to improve our documentation system. What you are looking at now is the first edition of the new documentation system. Comparing to the old one, here is the progresses that we made:

  • Replaced the old documentation system with a new one that was developed from Mkdocs, a more widely used and cooler tool to develop documentation system.
  • Integrated the documentation system with our official website, now you can go to Bazaar and other section like Forum and Community more conveniently.
  • Reviewed and rewrote documents for hundreds of products for the system’s first edition, and will continue migrate documents from old wiki to the new one.

An easy-to-use instruction is as important as the product itself. We are expecting this new system will improve your experience when using Seeed’s products. However since this is the first edition, there are still many things need to improve, if you have any suggestions or findings, you are most welcome to submit the amended version as our contributor or give us suggestions in the survey below, Please don’t forget to leave your email address so that we can reply.

Happy hacking