I used this suggestion http://blog.bryanduxbury.com/2012/01/one-transistor-audio-amplifier-for.html to amplify a small, 8 ohm speaker that is part of an Arduino project.
What I am finding is that the transistor is getting very hot. Is it a question of wiring (as per the diagram) or the transistor that is recommended (2N706)?
I am using an Uno for testing but will be using a Nano for the final project.
Any suggestions would be greatly appreciated.