DB-120 Daughterboard for MOTM-120

DB-120_pcb_p.jpg

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Last updated: March 31, 2008

Description

The DB-120 is a daughterboard for the MOTM-120 Sub-Octave Multiplexer. The DB-120 is intended to be used with the Stooge Panels 120R panel. The DB-120 adds individual outputs for the four sub-octaves, a staircase wave that is the binary weighted sum of the four sub-octaves, and a switch for selecting either AC or DC coupling for the staircase wave and the signal appearing at the MOTM-120 OUTPUT jack. The four sub-octave outputs are DC coupled square waves that swing between +5 volts and -5 volts.

Total current draw for DB-120 and MOTM-120 is 35 mA @+15V and 26 mA @-15V.

Circuit design by Richard Brewster.

Availability

The DB-120 is now shipping. The partial kit is $10 US and includes:

  • Printed Circuit Board (PCB)

Check here for payment options and shipping information.

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

Downloads

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-120 User Guide rev 1.0 (pdf)

DB-120 Schematics rev 1.0 (pdf)

Pictures

DB-120_pcb_fs.jpg DB-120_pcb_bs.jpg
PCB Top View PCB Bottom View
DB-120_mothers.jpg DB-120_daughters.jpg
Motherboard Installed Daughterboard Installed
DB-120_connects.jpg DB-120_powers.jpg
Motherboard Connections Power Connection
DB-120_panels.jpg
Front View