A 2cm x 4 cm Breadbord Soundamplifier for MP3-Player and experiments
Fritzing Amplifier for Breadboard connect. I always wonder when people contact an 8 ohm loudspeaker direct to the microcontroller pin. When we calculate the current through the speaker we get : I=U/R= 5V/8 ohm=0,625A=625 mA But microcontroller pin can only drive 20 mA to 40 mA!!!
So I designed this little amplifier to solve this problem.
Now you can connect your experiment or your MP3-Player to Fritzing Amplifier and enjoy the sound, depending on speaker you connect.
Have a lot of fun!
Yours Michael J.