Frequency central
Build documentation for:
Boom!!
Boom!! is an analogue drum voice with a broad range of applications.
The heart of the module is a VCO which is built around one half of a LM13700. The VCO has
a HIGH/LOW switch as well as a SWEEP control, which defines it’s response to the on
board
envelope.
The other half of the LM13700 has been carefully crafted into a release envelope generator,
which has a FAST/SLOW switch in addition to a RELEASE control. As a bonus, the input of the
envelope is velocity sensitive, allowing for a dynamic response.
Additionally, there is an envelope output, which can be used to drive external modules.
Main PCB Control 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.
Please observe the correct polarity for all ICs, diodes and electrolytic capacitors.
100nF
LED
Use 2.2uF
