MP3 mono amplifier kit
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Posted by
Gareth Evans
on
May 3rd, 2011
Hi, does the stereo jack internally connect both L & R channels together, or is only 1 channel fed to the amp board?Thanks
Gareth
Response by
geoffhampson
on
May 3rd, 2011
The mono amplifier only uses one channel. It doesn’t do anything cleaver, like equally mix the two channels. If you want a higher spec amplifier then there is a stereo version of the amplifier (there is a link to the stereo version on the related products - top left).
Posted by
Jamey :)
on
Sep 12th, 2011
Just wondering what is the maximum Decibel output?
Response by
geoffhampson
on
Sep 12th, 2011
The output sound pressure level for the speaker is 89 dB (+/- 3dB). The max input power of the speaker is 1W. So at 1m the output power will be 89dB.
Posted by
Michael
on
Sep 21st, 2011
What does the universal jack fit? Is it most phones and mp3 players but it won't fit the Iphone or Ipod!
Response by
geoffhampson
on
Sep 21st, 2011
We do a deluxe version of the amplifier, which is stereo and has a volume control, DC jack, on /off switch but more importantly is available in two options, with a standard 3.5mm jack or with an iPod connection. That version will work with an iPod but doesn't currently work with an iPhone as the connections are slightly different.
Posted by
hari kondabolu
on
May 22nd, 2012
what is the diameter of the speaker does anyone know????
Response by
geoffhampson
on
May 22nd, 2012
The speakers are 66mm in diameter.
Posted by
armitage shanks
on
May 23rd, 2012
Hi geoff, I was just writing to ask how much would it cost to purchase more than 500 kits? I am thinking of manufacturing a new, innovative, eco-friendly speaker system range. If it pleases you I coulod send you a few of my man plans.Regards,
Armitage
Response by
geoffhampson
on
May 23rd, 2012
We offer a bulk buy discount on all Kitronik project kits including this one. The full details of this can be found by clicking on the green £ icon at the bottom of the product description. For an order of 300 or more kits we would apply a 10% discount to the order.
Posted by
Chris
on
Jul 25th, 2012
Hi there, would this kit run off a USB cable instead? Thanks
Response by
geoffhampson
on
Jul 25th, 2012
You can run the amplifier off a 5V supply and the USB port is able to deliver enough current in this instance. However The higher the supply voltage the higher you can turn the volume up without it distorting.
Posted by
Alexandre
on
Nov 28th, 2012
Hello,Whell my school ordered some of these and i have one But my teacher did say we can change the speaker What is the maximum wattage i can use with these amplifier.Thanks
Response by
geoffhampson
on
Nov 28th, 2012
It depends upon the voltage you run the amplifier at as to what the output power will be. That said if you work on needing a speaker that can handle a peak power of at least 1W then you will be fine. You can of course go for a higher wattage speaker and whilst the amplifier won’t be able to drive the speaker at its full power the higher power speakers do tend to be of a better quality. That said if you try and drive a speaker that is too higher power the amplifier won’t have enough power to move the coil at all. So my recommendation would be a speaker between 1W and 20W. The speaker should have a resistance of 8 ohms. We do a higher power full range speaker which sounds really clear with the kit, see:http://www.kitronik.co.uk/products/components/audio/speakers/20w-10cm-full-range-speake
Posted by
Iwan
on
Nov 29th, 2012
Hi. We have been soldering the MP3 amplifier kit and a few of the pupils have had trouble with the volume of the speaker. Do you know the reasoning behind this? maybe something to do with one of the capacitors?
Thank you
Response by
geoffhampson
on
Nov 29th, 2012
There are a number of reasons why the kit might be quiet. Within the teaching material there is a fault finding flow chart which lists these reasons. If we assume the batteries are good and the volume on the music source is good then, the other options are:IC1 for a short on pins 1&2, 2&3 or 6&7
R1 & R2 are in the right place
For a dry joint on C4, R2 or IC1 pin 2.
Posted by
Keith
on
May 14th, 2013
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
Response by
AaronSturman
on
May 14th, 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.
Posted by
Keith
on
May 14th, 2013
Hi Aaron,Thanks for the quick response. Sorry I don't fully understand I'm a beginner at electronics. Would he trimmer pot be added to the board, I can't see how you would do that, or spliced into the input wire somehow? Do you sell 10k trimmer pots?
Thanks, Keith
Response by
AaronSturman
on
May 14th, 2013
You would have to connect it by wire. I would take the output wire from audio jack and connect one end to the trimmer then use a wire to connect the oopposite leg of the trimmer to the "audio-in" hole in the PCB. This is the trimmer I would use http://www.kitronik.co.uk/products/components/resistors/metal-shaft-linar-potentiometer . Leave a Reply
Average Rating:
Reviews:
MP3 mono amplifier kit
0
out of 5
based on
1 user review
This amplifier kit can be used with any personal stereo equipment, including MP3 players. It uses a TBA820M IC which can output 1.6W of power. The kit is supplied with a PP3 battery clip and can run off any voltage from 3 to 16 volts. It works nicely off a 9V battery (not supplied). Now supplied with pre-built jack cable. An accompanying Boom box is now available, see below for details.
Reviewed by
Pete
on
Jun 07th, 2011
I used this audio amplifier kit to make my own iPod amplifier. It worked well and the sound quality is good. It was easy to assemble and I think anyone with basic soldering skills shouldn't have a problem building it.
