Frequency central
Build documentation for:
System x dual adsr
Because two is better than one! Now even easier to build!
Main PCB Control PCB
Top of PCB Top of PCB
Bottom of PCB Bottom of PCB
Key to PCB screen print:
n:
This signifies NPN BC547 transistors. Note the correct pinout as shown by the half circles.
p:
This signifies PNP BC557 transistors. Note the correct pinout as shown by the half circles.
LED:
The shorter leg goes through the square pad.
Please observe the correct polarity for all ICs, diodes and electrolytic capacitors.
