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Schematic diagram, Schematic diagram & pcb – Velleman projects K1803 Assembly instructions User Manual

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9. Schematic diagram.

Schematic diagram & PCB

R4

100K

R3

10

0K

R2

100K

C1

10µ

GND

+V

C2

10µ

C5

10µ

SK1

AF IN

SK2

AF OU T

3

2

8

4

1

IC1A

5

6

7

IC1B

C3

10µ

C4

10µ

R7

2K2

R6

100K

R1

100K

R5

100K

RV1

220K

10. PCB