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MP3 Mono Amplifier Project Kit, no longer stocked

Exclusive to Kitronik
Teaching Notes
Key Stage 3
DISCONTINUED - MP3 Mono Audio Amplifier Kit: can be used with any Personal Stereo Equipment, is supplied with a PP3 Clip and a Jack Cable, and uses a TBA820M Audio Amp IC.

Availability: Out Of Stock.

Code1+ 5+ 50+
(£3.624 incl VAT)
(£2.748 incl VAT)
(£2.388 incl VAT)

Please note: this product has been discontinued and is present for reference only. It is not possible to buy this product.

This item has been replaced by MP3 Mono Amplifier V2.0.

This audio amplifier kit can be used with any personal stereo equipment, including MP3 players.

It uses a TBA820M audio amplifier IC which can output 1.6W of power.

The kit is supplied with a pre-built jack cable and a PP3 battery clip, and can run off any voltage from 3 to 16 volts.


  • Great value electronic project kit.
  • Works with any stereo equipment.



  • PCB Length: 45.5mm.
  • PCB Width: 35.5mm.



This kit is supplied in a grip seal bag. It is also available in retail packaging. For more details on this version click here, and a version with a Perspex case included, for more details on this version click here.

Click here to find out more about Autodesk.

Free samples:

Teachers can order a sample of this kit (one per school) here. You will need to select the kit from a list of all the sample kits; the stock code for this kit is 2115.
Note: this service is only offered to schools for evaluation purposes only.

Buy British:

 This kit is designed and manufactured in the UK by Kitronik.

Please note: this product has been discontinued and is present for reference only. It is not possible to buy this product.

Physical characteristics:

  • PCB Length: 46mm.
  • PCB Width: 36mm.
  • PCB Component Count: 13.

Electrical characteristics:

  • Voltage Nominal: 9V.
  • Voltage Range: 3V - 16V.
  • Standby Current: 4mA.
  • Current Max at Nominal Voltage: 60mA.
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Posted by Alice Taylor, Monday, 9 June 2014 on product MP3 Mono Amplifier Project Kit, no longer stocked


Maybe a silly question but do you solder the resistor legs together or solder onto the board and then cut the legs?


  • Posted by Aaron Sturman on Monday, 9 June 2014
    You push the legs through the holes on the board, solder them in place then cut off the excess.
Posted by Patryk Dyl, Friday, 6 June 2014 on product MP3 Mono Amplifier Project Kit, no longer stocked


Hi I have a question, would this board be able to run 1W x2 speakers 4ohms if I put them in parallel and divide 8ohms into 4ohms and if I'm right would the speakers work at 0.8W since they are going to divide the wattage?


  • Posted by Aaron Sturman on Friday, 6 June 2014
    The amplifier IC can't output more than 1W total so if you have 2 speakers the most power they can provide is 0.5W each.
Posted by James, Friday, 21 June 2013 on product MP3 Mono Amplifier Project Kit, no longer stocked


I have completed a PCB but it is not plasying anything other than a ticking noise.I have checked for any faults and it all seems as it should work. What exactly will it work with? ipod, phones (other than iphone) or standard MP3 player? Just put a big order in for my class and need them to know what it will work with. Cheers


  • Posted by Aaron Sturman on Friday, 21 June 2013
    Hi James, the mono amp should work with anything that has a 3.5mm socket. I can confirm it works with an iphone just fine if you put it in the headphones socket. I would recommend taking a photo of the top and the bottom of the board and emailing them to and I will take a look at what is causing the problem.
Posted by Joe, Tuesday, 18 June 2013 on product MP3 Mono Amplifier Project Kit, no longer stocked


I had this product all wired up and it worked for 2 weeks but then, whenever i use it i get a buzzing noise from it and the sound quality becomes very poor. Could you please advise me on what to do about this. Thanks.


  • Posted by Geoff Hampson on Tuesday, 18 June 2013
    Have you left the battery connected while the kit is not in use? As the amplifier will take a bit of power to amplify the silence and once flat the board wont work.
Posted by Keith, Tuesday, 14 May 2013 on product MP3 Mono Amplifier Project Kit, no longer stocked


Hi, Is it possible to add a volume control to this kit for my project? I know this is available on the stereo kit but I only want to use one speaker. Is there a way of using the stereo kit to produce a mono output? Thanks, Keith


  • Posted by Aaron Sturman on Tuesday, 14 May 2013
    A 10K Trimmer Pot (variable resistor) placed just after the audio input will act as a volume control. When set to minimum resistance the volume will be full and as the resistance is increased the volume will go down.

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