Small Amplifier

We have a number of TDA2611A 5W amplifier chips at the space and I'd like to build a small 5W audio amplifier and perhaps develop it into a workshop project.

Some examples of its use: -

• A circuit: http://frrl.wordpress.com/2008/08/03/history-of-reciever-design-regeneration-and-building-the-tectec-1253/
• (Just a mention) http://michaelgellis.tripod.com/audioamp.html
• TDA2611A in a simple amp: http://unitrel.pl/gif/tda2611.pdf
• http://mxh.strefa.pl/pliki/tech/book2006/15.pdf

Some thoughts: -

• it's a dual learning and skill sharing exercise
• The TDA2611A costs about 75p nowadays!
• we would just be gainfully employing them!
• this is a set up to knock down -
  • the first design is to see if we can make it work
  • I don't expect it to be any good!
• I shall make the example circuit from Fig 10 in the datasheet
• we have plenty of large capacitors at the space
• we also have lots of power transformers that will give us 24V power for workshop take-homes
• also audio transformers for decoupling - as we use here at work
• potentiometers for faders 10Mo Log pots required
• I'd like to control volume and tone optionally by Arduino

Larger class B amplifier designs: -

• http://skema-amplifier.blogspot.co.uk/2011/04/60w-power-amplifier-class-b.html