386 0.1.1
This board uses an LM386 chip to make a very simple
amplifier.
Name
Value
Explanation
C1
10uF
capacitor
Used for distortion.
Should be
omitted for the OKAY.
C2
.1uF (104)
Bypass capacitor
C3
220uF
For speaker amplification
C4
47nF (473) C4 and R1 create a “snubber circuit”
to suppress self-oscillation noise
R1
10 (brown
black
black)
Part of snubber
POW
Power
Connects to bus PCB
INP
Audio input The + pin will connect to the rotary
switch. The - pin can be omitted for
the OKAY because all boards share
the same ground.
DIST
Distortion
switch
Should be omitted for the OKAY.
VR1 /
VOL
Volume
potentiom
eter
VR1 and and the VOL header
redundantly expose the same three
points used to control the audio
volume before it gets amplified.
Summary of Contents for OKAY 2 Synth
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Page 15: ...Wiring diagram ...
Page 34: ...Appendix Circuit schematics ...
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