Assembly instructions User guide

7
9. Schematic diagram.
Schematic diagram & PCB
R4
100K
R3
100K
R2
100K
C1
10µ
GND
+V
C2
10µ
C5
10µ
SK1
AF IN
SK2
AF OUT
3
2
84
1
IC1A
5
6
7
IC1B
C3
10µ
C4
10µ
R7
2K2
R6
100K
R1
100K
R5
100K
RV1
220K
10. PCB