Record Playback


This project allows a short (10 second) message to be recorded and played back at the push of a button. There is one button to play the message and another to re-record the message which can be done over and over again.

The project includes a status LED which indicates that recording is in progress or that playback has completed. Both the speaker and microphone are PCB mounted so the only flying leads are for the battery holder which takes 2 AA batteries.

Because the project shuts down when it is not in use the batteries will last a very long time. An interface connector is available for more advanced users that wish to access the control signals. Requires x2 AA batteries, available separately.


Our aim is to support teachers with the resources needed to successfully run this unit of work in their classrooms. We provide complete kites as teaching resources are downloadable. The beauty of the Record Playback project is that it can be run without expensive equipment.

Materials And Equipment

Fax your order to (02) 9789 5280. Please note the price below does not include GST. Record Playback Project Instructions Download

Product  Description Code Price
   2 x 1K resistor 5%    
   2 x 4.7K resistor 5%    
   1 x 100K resistor 5%    
   1 x Capacitor (ceramic disc) 1nF    
   3 x 100nF ceramic disc capacitor    
   1 x Capacitor, electrolytic, 16V, 220uF    
   1 x Capacitor, electrolytic 4.7uF    
 Record Playback Project Kit
 1 x 5mm red LED  KRPPK  $14.80
   2 x 6mm PCB mount switch - height 9.5mm    
   1 x 14 pin IC holder    
   1 x ISD1820 Record playback IC    
   1 x Microphone  
   1 x 31mm fully enclosed speaker    
   1 x Battery holder with leads (2x AA)    
   1 x Record playback PCB    

The board has an interface connector which allows some of the more advanced options of the IC to be accessed. This allows the following features:

  • Connection of remote (off board) switches for record & playback.
  • Access to the pins to part play a message or to use the looped play option.
  • Control by a micro-controller (for example Arduino or PIC) if required.
  • Access to the audio output signal, which can be used with a more powerful amplifier if required.