joy-it ISD1820 Voice Recorder Instructions

ISD1820 Voice Recorder

Product Information

Specifications

• Product Name: SBC-SOUNDMODULE
• Model: Sound recorder ISD1820
• Manufacturer: Joy-IT powered by SIMAC Electronics GmbH
• Chipset: ISD1820
• Recording Time: 8 to 20 seconds
• Control: Built-in keypad
• Speaker: 0.5 watt
• Microphone: Included

Product Usage Instructions

Changing the Recording Time and Sampling Rate

To set the recording duration and sampling rate:

• Solder on a different resistor to change the values.
• Refer to the table for resistor values and corresponding settings.

Module Explanation

Explanation of pins:

• VCC: 3.3V Power supply.
• GND: Ground connection.
• FT (Feed Through): Allows microphone output directly to the speaker.
• P-L (PLAYL): Play recorded as long as the pin is HIGH.
• P-E (PLAYE): Plays recorded once.
• REC: Activates recording when set HIGH, runs for set recording time.
• Speaker Connection: Connect the 8 Ohm 0.5W speaker.

Use with Arduino Connection of the Module

When using Arduino:

• Connect the module to ARD-R3DIP pins as shown in the provided diagram or table.
• Use a voltage translator like KY-051VT to convert digital pin voltages from 5V to 3.3V.

Frequently Asked Questions

Q: How can I change the recording time and sampling rate?

A: You can change the recording time and sampling rate by soldering on a different resistor as per the provided table.

Q: What is the power supply requirement for the module?

A: The module requires a 3.3V power supply.

Q: How can I connect the speaker to the module?

A: Connect the enclosed 8 Ohm 0.5W speaker by soldering the cables to the designated pads ensuring correct polarity.

GENERAL INFORMATION

Dear Customer,
Thank you for choosing our product. In the following, we will show you what to consider during commissioning and use. Should you encounter any unexpected problems during use, please feel free to contact us.
This sound module has a sound recorder and a playback device. It is equipped with an ISD1820 chipset and has a recording time of about 8 to 20 seconds. It can be controlled via a built-in keypad and has a 0.5-watt speaker and microphone.

CHANGING THE RECORDING TIME AND SAMPLING RATE

To set the recording duration and sampling rate to a different value, it is necessary to solder on a different resistor. The value of the resistor determines the duration of the recording and the sampling rate, which can vary in the range from 8 to 20 seconds (with a sampling rate of 3-8 kHz). In the following picture, the resistor to be changed is marked. A table shows you which resistors are required for which settings.

  Resistance value **| Duration **| Sampling rate **| Bandwidth **
---|---|---|---
80K Ω| 8 Seconds| 8.0KHz| 3.4KHz
100K Ω| 10 Seconds| 6.4KHz| 2.6KHz
120K Ω| 12 Seconds| 5.3KHz| 2.3KHz
160K Ω| 16 Seconds| 4.0KHz| 1.7KHz
200K Ω| 20 Seconds| 3.2KHz| 1.3KHz

MODULE EXPLANATION

In this section, we briefly explain the individual functions of the pins to which you can connect your microcontroller or single-board computer. This is not a detailed explanation and only serves to explain the pins.

Note with the included speaker that you have to solder the cables to it yourself. Please note that you have to solder the cables in a certain way in order not to mix up plus and minus. On the back of the speaker, you will find the solder pads where you have to solder the included cable. Make sure that you solder the cable with more points on the back to the “+ pad” of the speaker and the cable with the few points on the back to the “- pad” of the speaker.

USE WITH THE ARDUINO

Connection of the module
In this tutorial, we use the Arduino-compatible microcontroller ARD-R3DIP.
Connect the recording device to the pins of the ARD-R3DIP as shown in the following picture or table.
Please note that the module is a 3 V module. Therefore, a voltage translator is needed to convert the voltage of the ARD R3DIP’s digital pins from 5 V to 3 V. We recommend the KY-051VT from Joy-IT.

Code example
Please copy the following sample code completely into your Arduino IDE. You can then upload this code example to your Arduino. Please make sure that the port and board are set correctly under Tools. Alternatively, you can download the code sample here. After the successful transfer of the code, the module will alternately start a 10-second recording and play it back afterward.

USE WITH THE RASPBERRY PI

This guide was written under Raspberry Pi OS Bookworm for the Raspberry Pi 4 and 5. It has not been checked with newer operating systems or hardware.

Connecting the module
Connect the capture device to the pins of the Raspberry Pi as shown in the following picture or table.

Code example
Once you have started your Raspberry Pi, open the terminal console and run the following command:

• nano ISD1820.py

In the window that opens, please enter the following code completely. Alternatively, you can download the code example here download it here.

You can save your input with the key combination CTRL+O and leave the

editor with CTRL+X. You can then start the example with

• python3 ISD1820.py

ADDITIONAL INFORMATION

Our information and take-back obligations according to the Electrical and Electronic Equipment Act (ElektroG)
Symbol on electrical and electronic equipment:
This crossed-out dustbin means that electrical and electronic appliances do not belong in the household waste. You must return the old appliances to a collection point. Before handing over waste batteries and accumulators that are not enclosed by waste equipment must be separated from it.

Return options:
As an end user, you can return your old device (which essentially fulfills the same function as the new device purchased from us) free of charge for disposal when you purchase a new device. Small appliances with no external dimensions greater than 25 cm can be disposed of in normal household quantities independently of the purchase of a new appliance. Possibility of return at our company location during opening hours: SIMAC Electronics GmbH, Pascalstr. 8, D D-47506 Neukirchen Neukirchen-Vluyn, Germany

Possibility of return in your area:
We will send you a parcel stamp with which you can return the device to us free of charge. Please contact us by email at Service@joy- it.net or by telephone.

Information on packaging:
If you do not have suitable packaging material or do not wish to use your own, please contact us and we will send you suitable packaging.

SUPPORT

If there are still any issues pending or problems arising after your purchase, we will support you by e-mail, telephone, and with our ticket support system. Email: service@joy-it.net Ticket System: http://support.joy-it.net Telephone: +49 (0)2845 9360-50 (Mon – Thurs: 09:00 to 17:00 o’clock CET, Fri: 09:00 to 14:30 o’clock CET) For further information please visit our website: www.joy- it.net

References

• ITnet | Servizi di Colocation e Cloud
• Joy-IT Helpdesk
• For Makers and Professionals | Joy-IT
• Joy-IT Helpdesk

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