It is a simple audio amplifier based on an IC LM386 and some resistors and capacitors.
R1 = 10 Ohm
R2 = 100Ohm
C1 = 220uf 25v
C2 = 0.001uf
C3 = 0.047uf
C4 = 0.047uf
VR= 10K Ohm
C5 = 330uf
R3= 3.3k
D1 = Simple Red LED
R1 = 10 Ohm
R2 = 100Ohm
C1 = 220uf 25v
C2 = 0.001uf
C3 = 0.047uf
C4 = 0.047uf
VR= 10K Ohm
C5 = 330uf
R3= 3.3k
D1 = Simple Red LED
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