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MP3 Mono Amplifier V2.0

3.33
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+
2154£3.33
(£3.996 incl VAT)
£2.39
(£2.868 incl VAT)
£2.09
(£2.508 incl VAT)
OR

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).

Features:

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

Contents:

Dimensions:

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

Requires:

Resources:

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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MP3 Mono Amplifier Kit – Milton Abbey School
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Mono Amplifier Kits – Milton Abbey School
Mono Amplifier Kit examples sent in by James Ratcliffe at the Milton Abbey School in Dorset.
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Gallery Mono Amplifier – Barry Comprehensive School
MP3 Mono Amplifier Kit by year 10 Product Design students at Barry Comprehensive School.
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Gallery Mono Amplifier – Meole Brace School
MP3 Mono Amplifiers by year 9 students at Meole Brace School.
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Mono Amplifier Training Aid by Eggar's School.
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Questions:

Page:
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  2. 2
Posted by kieran, Wednesday, 8 March 2017 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    Hi Kieran, A standard 9V battery has a capacitance of around 500mA. As such if it is used with the mono amp kit you would get around 7 hours of continual use. This is based on a maximum current draw of 70mA at a 9V supply.

    Posted by Michael Lockhart on Wednesday, 8 March 2017
Posted by brandon, Monday, 20 February 2017 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    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 Michael Lockhart on Monday, 20 February 2017
Posted by Carl Webb, Thursday, 22 September 2016 on product MP3 Mono Amplifier V2.0
Posted by Fnfjfj, Tuesday, 20 September 2016 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    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, https://www.kitronik.co.uk/2154-mp3-mono-amplifier-v20.html

    Posted by Michael Lockhart on Tuesday, 20 September 2016
Posted by Malaika, Wednesday, 14 September 2016 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    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 Michael Lockhart on Wednesday, 14 September 2016
Posted by Carl Webb, Monday, 12 September 2016 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    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, https://www.kitronik.co.uk/pdf/2154_mono_amp_essentials_2_2.pdf

    Posted by Michael Lockhart on Monday, 12 September 2016
Posted by Campbell Clark, Tuesday, 23 August 2016 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    Hi Campbell, With regards to the feedback and static you are getting this is likely to be an issue with either a solder joint of a connection with the input or output cable. We have tested this board with different versions of phones and the board performs the same across all of the devices.

    Posted by Michael Lockhart on Tuesday, 23 August 2016
Posted by Amy Ogden, Friday, 8 July 2016 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    Hi Amy, There shouldn’t be any reason why a new phone such as the IPhone 6 gives off more static/feedback through the amplifier, although we are looking into this. To aid us in trying to work out what is causing this if you send a photo of the top and bottom of the circuit board and also the connect onto the speaker to support@kitronik.co.uk we can take a look.

    Posted by Michael Lockhart on Friday, 8 July 2016
Posted by Mustafa Al-Quraishi, Wednesday, 25 May 2016 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    Yes you can change the speaker supplied to this one, however this amp kit can only output a maximum of 1.25W of power. As such you wouldn’t get the full use out of the speaker.

    Posted by Michael Lockhart on Wednesday, 25 May 2016
Posted by D Rudd, Friday, 20 May 2016 on product MP3 Mono Amplifier V2.0
Posted by Connor, Friday, 8 April 2016 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    In theory there wouldn’t be any reason why it wouldn’t work. However it may be that the audio is amplified too much, which could be controlled with a potentiometer or not enough. It would be a case of trying it out to see what happens.

    Posted by Michael Lockhart on Friday, 8 April 2016
Posted by Amar Sharma, Wednesday, 30 March 2016 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    Unfortunately we don’t have a PCB layout diagram for this product, we only have a circuit diagram which is shown in the essential information document.

    Posted by Michael Lockhart on Wednesday, 30 March 2016
Posted by Mark, Monday, 8 February 2016 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    The gain on the amplifier is set by putting a capacitor and resistor between pins 1 and 8 on the amplifier IC. We don’t use these pins on our circuit which leaves the gain default at 20.

    The data sheet for the amplifier chip explains which resistance and capacitance values result in different gain values. The data sheet for the IC can be found here, https://www.kitronik.co.uk/pdf/LM386.pdf

    Posted by Michael Lockhart on Monday, 8 February 2016
Posted by Dave Lowry, Wednesday, 2 December 2015 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    Hi, yes that supply is compatible. Just cut the barrel jack off and solder the positive wire into the positive power pad on the kit and the negative one to the negative pad. (The negative wire has a white stripe on it).

    Posted by Aaron Sturman on Wednesday, 2 December 2015
Posted by David, Wednesday, 11 November 2015 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    There could be a few reasons why the sound is distorted, if you look in the essential information document, https://www.kitronik.co.uk/pdf/2154_mono_amp_essentials_2_2.pdf at the fault finding flow chart this will provide a few possible solutions. If you are still having an issue email a photo of the top and bottom of the circuit board to support@kitronik.co.uk

    Posted by Michael Lockhart on Wednesday, 11 November 2015
Posted by Dominic Schoen, Tuesday, 26 May 2015 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    No, this product is the kit version, the pre-built version is 2154B. The product would work using a USB power supply, however at such a low voltage the maximum volume will be limited. If you try to go to the maximum volume at that voltage you will get a lot of distortion and “clipping” as the amplifier tries to output a signal larger than the input voltage (5V).

    Posted by Michael Lockhart on Tuesday, 26 May 2015
Posted by Junaid, Tuesday, 10 March 2015 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    The speaker supplied with this kit is a 8 ohm 66mm Speaker.

    Posted by Michael Lockhart on Tuesday, 10 March 2015
Posted by jas, Tuesday, 16 December 2014 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    Hi, this kit doesn't output enough power to efficiently drive 70W speakers. The sound would likely be very quiet and somewhat distorted. Using two 70W speakers would make the problem even worse as the kit would still supply the same power only it would have to be shared between two speakers. 

    Whether the speakers should be connected in series or in parallel would depend on the impedance rating of the speakers. In either case though, this kit isn't designed for use with such speakers. You would be better off with our high power amplifier. It's a stereo system so it uses two speakers and can deliver 15W into each.

    Posted by Aaron Sturman on Tuesday, 16 December 2014
Posted by Aditi Gupta, Thursday, 4 December 2014 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    We are currently looking into developing a bluetooth module, it's a possibility in the future. 

    Posted by Aaron Sturman on Thursday, 4 December 2014
Posted by jasbir sond, Thursday, 27 November 2014 on product MP3 Mono Amplifier V2.0
  • 0
    vote
    A:

    Yes, this works fine.

    Posted by Aaron Sturman on Thursday, 27 November 2014
  • 0
    vote
    A:

    Yes, this works fine.

    Posted by Aaron Sturman on Thursday, 27 November 2014

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