2.5k
The LM380 is a power audio amplifier for consumer application. There are 2 versions an 8 pin DIP package and a 14 pin package where pins 3, 4 , 5 , 10, 11 and 12 are connected to ground and act as a form of heatsink. The 14 pin package can supply about 2w, the 8 pin version about 0.7w.
In the schematic below you need to change the capacitors to 470uf for the 14 pin variant.
Schematic
LM380 audio amplifier
Parts List
QTY PART-REFS VALUE --- --------- ----- Resistors --------- 1 R1 2.2r Capacitors ---------- 2 C1,C2 220uf Integrated Circuits ------------------- 1 U1 LM380 Miscellaneous ------------- 1 LS1 SPEAKER 1 RV1 10k
Links