DB-320 Daughterboard for MOTM-320


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Last updated: March 31, 2008


The DB-320 is a daughterboard for the MOTM-320 Voltage Controlled LFO. The DB-320 adds inverted outputs for the four LFO waveforms. A header is also provided for connecting the RANGE switch on the MOTM-320R panel.

Total current draw for DB-320 and MOTM-320 is 63 mA @+15V and 57 mA @-15V.

Circuit design by Larry Hendry.


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The MUUB-4 replaces the DB-320.

MOTM-style front panels for this module can be ordered from The Bridechamber and Stooge Panels.


The User Guide does not contain detailed explanations on how to install parts or which kinds of solder to use. The intended audience is the experienced kit builder who is quite comfortable building a circuit from a description, a parts list, and a schematic.

DB-320 User Guide rev 1.1 (pdf)

DB-320 Schematics rev 1.1 (pdf)


DB-320_pcb_fs.jpg DB-320_pcb_bs.jpg
PCB Top View PCB Bottom View
DB-320_mothers.jpg DB-320_daughters.jpg
Motherboard Installed Daughterboard Installed
DB-320_connects.jpg DB-320_r18s.jpg
Motherboard Connections R18 Detail
DB-320_panels.jpg DB-320_powers.jpg
Front View Power Connection