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Audio Amplifier Kit - STA540, available until stock exhausted

13
DISCONTINUED - A Stereo Audio Amp Kit using the STA540 IC. Once completed, you will have a fully functional amplifier with standby switch, volume control and indicator LEDs.

Availability: Out of stock

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4603 £13.00
(£15.60 incl VAT)

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

Was £18.99.

Now £13.00.

Clearance prices shown in orange are in GBP and exclusive of VAT.

This is a stereo audio amplifier kit from SparkFun Electronics. It is designed to make use of the STA540 power amplifier IC. Once this kit is completed you will have a fully functional, two-channel audio amplifier, complete with a standby switch, volume control and indicator LEDs. The kit also includes a 6400BG heat sink for the STA540 to dissipate any damaging heat.

In this kit, the STA540 is configured as a dual bridge amplifier capable of delivering up to 2x 38W (4Ω at 18V). The power supplied to the kit directly powers the STA540 and should be within 8 to 22V.

This kit comes as a bag of parts, you'll need to solder everything to the PCB. All components are through-hole, so it shouldn't be too difficult; but this kit is a bit more complex than some of our other kits.

Kit Includes:

  • 1x STA540 Audio Amplifier Kit PCB
  • 1x STA540 Dual/Quad Power Amplifier
  • 1x 6400BG Heatsink
  • 1x LM358 Op Amp
  • 3x LED - Basic Red
  • 1x SPDT Mini Power Switch
  • Resistors: 5x 10K Ohm, 3x 1.0K Ohm, 2x 47k Ohm, 2x 100k Ohm
  • 2x 10k Giant Trimpot
  • Capacitors: 3x 0.1uF-50V-20%, 1x 100uF - 25V, 4x 0.47uF-25V, 2x 10pF - 200V - 5%, 3x 1uF - 50V - -20,+80%, 1x 1000uF/25V
  • 5x 2-Pin Screw Terminal - 3.5mm
  • 4x Nylon Round Female Standoff
  • 5x Phillips Screw with 4-40 Thread
  • 1x #4-40 Hex Nut

Speakers not included

Documents/Files:

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

Questions:

Posted by Haukur Þórðarson, Tuesday, 10 May 2016 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A:

    This kit is configured as a dual bridge amplifier that can output 38W per channel, so these speakers would be fine.

    Posted by Michael Lockhart on Tuesday, 10 May 2016
Posted by Richard Craig, Monday, 11 April 2016 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A:

    You could configure it so that it is a single channel, however you wouldn’t be able to increase the power output. The best way to do this is to use a mono input cable, connect the ground to the ground on the board. You would then need to split the signal input and connect this to both the right and left channel. You would then connect two speakers up, one to each output and both of the speakers would then play the same sound at the same time. This may give you a slightly increased volume.

    Posted by Michael Lockhart on Monday, 11 April 2016
Posted by Ross Grimshaw, Wednesday, 2 December 2015 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A:

    Hi, you need a 3.5mm stereo lead such as this one https://www.kitronik.co.uk/4111-stereo-amp-cable.html 

    Solder the white wire to the "+ Left Input" and the red to the "+ Right Input" and the black wire to either "- Left  Input" or "- Right Input". It won't make any difference which you choose.

    Posted by Aaron Sturman on Wednesday, 2 December 2015
Posted by lewis bainbridge, Wednesday, 4 February 2015 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A:

    Hi Lewis, there could be a few different reasons for the product not working so it is difficult to say. If you email me at support@kitronik.co.uk with a photo of the top and bottom of the board, and any information about what the circuit is doing then i can suggest what might be wrong.

    Posted by Michael Lockhart on Wednesday, 4 February 2015
Posted by Tom, Thursday, 29 January 2015 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A:

    The amplifier kit can supply a maximum output of 38W per speaker (4Ω at 18V).

    Posted by Michael Lockhart on Thursday, 29 January 2015
Posted by Lewis bainbridge, Thursday, 9 October 2014 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A: Measuring off the PCB photo which might be out by a mm or two it is: 89 x 43 mm.
    Posted by Geoff Hampson on Thursday, 9 October 2014
Posted by chris, Friday, 16 May 2014 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A: You could add high or low pass filters to the channel inputs to limit the frequencies that reach the IC. This wold have to be done by adding an external circuit before the amp though.
    Posted by Aaron Sturman on Friday, 16 May 2014
Posted by Idrice Tahat, Friday, 11 April 2014 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A: We do an iPod / iPhone lead that has the connections for the audio out from the device, it doesn't have the connections to charge the device. The higher the voltage of the power supply (up to the limit of 22V) the louder you will be able to drive it. The circuit is quite high power so you should use a PSU capable of delivering a couple of amps. We have a 12V 2A wall block PSU which we will be adding soon.
    Posted by Matt Macleod on Friday, 11 April 2014
Posted by Zach, Friday, 11 April 2014 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A: Hi Zach, 2A is plenty to run the amp at 12V. When adding batteries in series you don't increase the maximum current they provide. Just the voltage. I wouldn't recommend running it from batteries though as it will run them flat very quickly unless you are using a very large rechargeable Lithium Polymer battery. It would be very expensive to keep replacing the batteries every few hours.
    Posted by Matt Macleod on Friday, 11 April 2014
Posted by Roni, Thursday, 7 April 2011 on product Audio Amplifier Kit - STA540, available until stock exhausted
  • 0
    vote
    A: As long as your guitar has a line out signal (which it should) then you will be able to use this amplifier board. If you are only wanting to use the amplifier as an amplifier for practicing then the mono amplifier shown in the related products box (top left) would give a suitable volume, but without volume control. The benefit of this kit is that it includes a volume control, but you will need to consider the connections in terms of audio in and the speakers.
    Posted by Geoff Hampson on Thursday, 7 April 2011

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