Moon Modular M569 Quad Sequential
Voltage Source

I purchased a Moon Modular M569 sequencer which is my first Moog/Dotcom format module.  I built new wood side cabinets which has one row for Dotcom format modules.


I use a MOTM-990 power distribution board and built a MOTM-to-Dotcom power cable.


I don't have any incandescent lamps in my synth and Moog lamps were not bright.  The run lamp was way too bright so I replaced the 16ESB T5 slide base lamp with a 28ESB (Mouser 606-CM28ESB) so it was less bright.  It still stood out as the only incandescent lamp in my synth so I made a Lumix LED slide base lamp.  I heated a 16ESB T5 slide base lamp to break the glue and separated the metal wings from the lamp and cut it out.  I used a Lumix LED with a series diode (since it runs on AC) and a 1K2 1/8 watt resistor and soldered it between the wings.



To make it structural I then filled the cavity with epoxy.  Now I have a nice green LED.



JLR Transpose Modification

John Rice modified his M569 with switches to disable the transpose function for rows 3 and 4 so that these rows could be used to transpose rows 1 and 2 as described on The awesome Moon 569 sequencer modified to be even better! topic on the Muffwiggler forum (this topic was lost when the Muffwiggler forum was hacked and is now described on the Moon Modular 569 transpose input modification topic).  John has an earlier version PCB than I do using discrete resistors where this version uses four SIP resistor packages for precision matching.  The transpose signals to these resistors are on the back of the PCB and can easily be accessed.  The red outline area indicates where the transpose circuitry is on the PCB.


This image is a close-up of the area and the transpose resistor pins are circled in red.  I did not determine which was for row1 or 2.


This image shows the two cut runs for rows 3 and 4 and the two added shunts for enable or disable.  I added switches on my Companion Module which connect to these square pins.  I ground the resistor pin when the row transpose is disabled to minimize any noise.


I soldered one of the square pins to the resistor and bent the other at 90 to connect to the wire.  The shunts sit nicely off the PCB and are easy to access on the rear.



Companion Module

While I like this sequencer a lot, I really want to be able to slave other devices to it.  You can use the Shift inputs to drive the M569 from an external clock but it would be nice to have the Clock and Run signals to control other modules.  I designed a M569 Companion module to expand the functionality of the M569.