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MP3 Mono Amplifier V2.0

Exclusive to Kitronik
Teaching Notes
Key Stage 3
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 LM386 Audio Amp IC.

Availability: In Stock.

Code1+ 5+ 50+
(£3.996 incl VAT)
(£2.868 incl VAT)
(£2.508 incl VAT)

Our newest version of our best selling Mono Amplifier Kit can be used with any personal stereo equipment, including MP3 players, making it an ideal kit choice for an amplifier case design project.

It uses an LM386 audio amplifier IC which can output 1.25W of power. The LM386 is a very popular audio IC that can be found in everything from radios to guitar practice amplifiers as it is suitable for battery powered devices.

The kit is supplied with a pre-built jack cable and a PP3 battery clip, and can run off any voltage from 4 to 12 Volts (Absolute Maximum 15V).


  • 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 2154.
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.

Physical characteristics:

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

Electrical characteristics:

  • Voltage Nominal: 9V.
  • Voltage Range: 4 - 12V (Absolute Maximum 15V).
  • Typical Standby Current: 4mA.
  • Current Max at Nominal Voltage: 70mA.
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IMG_9253 (Copy)
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Posted by brandon, Monday, 20 February 2017 on product MP3 Mono Amplifier V2.0


Does the polarity matter on the speaker because the speaker is polarised but the PCB doesn't show it


  • Posted by Michael Lockhart on Monday, 20 February 2017

    Hi Brandon, On the Mono amp kit it doesn’t matter which way round the speaker is connected even though the speaker does show a positive and negative connection.

Posted by Carl Webb, Thursday, 22 September 2016 on product MP3 Mono Amplifier V2.0


Therefore we must have to old version. V1.2 on board. It has six capacitors and three resistors. the resistors are not the same as the factsheet you directed me to. have you got the old one? have we been sent the old chips? Thanks/


Posted by Fnfjfj, Tuesday, 20 September 2016 on product MP3 Mono Amplifier V2.0


What are the functions


  • Posted by Michael Lockhart on Tuesday, 20 September 2016

    Hi, The function is to amplifier an MP3 player our similar, and you can create a design to house the circuit in such as what can be viewed in the ‘Media’ tag in the following link,

Posted by Malaika, Wednesday, 14 September 2016 on product MP3 Mono Amplifier V2.0


Who is it made for and why (age appropriate for).


  • Posted by Michael Lockhart on Wednesday, 14 September 2016

    Hi Malaika, The mono amplifier is aimed at key stage 3 and above, so approximately aged 11 upwards. However if the child is competent then there isn’t a reason why a younger person couldn’t make this kit (with supervision). We aim to have a range of kits suitable for different age groups, because of the number of components and the slightly more difficult build than other kits and as such the kit falls into the intermediate range of kits.

Posted by Carl Webb, Monday, 12 September 2016 on product MP3 Mono Amplifier V2.0


We use the Mono amplifier kit. It seems the batch we currently have is a different PCB with slightly more components. Therefore the instruction sheets on your website are incorrect for this board. The pcb says v1.2 on it. Are there instruction sheets for this one? Why are there two versions? Thanks.


  • Posted by Michael Lockhart on Monday, 12 September 2016

    Hi Carl, The reason for the change is that the chip used on the old mono amp kit (2115) became obsolete, as such a new chip was sourced but this required a slightly different board design. As such we moved from the old version to the new version in the 2014/2015 catalogue (code 2154). Please be aware that any of the old amplifier chips won’t work in this new build. The build instructions for the new version can be found here,

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