Prog Sequencer 192 Build Guide

Assembly Instructions

The Programmable Sequencer 192 module is similar in construction to other modules covered in the ‘General Build Info' page. Additionally:

The programmable sequencer is constructed similarly to most other modules except for one main difference – the two 64-segment LED matrix display. 

Start by assembling all components on the top side of the PCB, no need for heatsinks on the regulators as power consumption has been lowered making them unnecessary. Next comes the switches, LED displays (note orientation with part number printing facing switches (see photo below) and encoder for the bottom side. We suggest placing the bottom side components in position first without soldering. This is where the next stage depends on the version being assembled:

MOTM - Assemble the PCB to the aluminium back panel (including the red lens) using the four spacers and screws.

MU - Rather than the small red lens that goes with the MOTM, the MU has a full size lens that not only covers the rear of the panel but also serves to mount the PCB to it. Assemble the PCB to the lens using the 2 spacers, brace and 4 x screws (see photo below).

The switches and encoder are captive but make sure they are fully engaged into the PCB before soldering. The displays need to be touching the red lens before soldering its pins. They can be a bit tight so soldering two diagonally opposite pins first. Reflow the joints if you need to whilst applying pressure to an adjacent pin, use a fine tipped iron as the connections are quite close to the power headers.

MU – The MU version also has a brace that is used to attach the assembly to the panel. There are two grub screws that unwind from the brace into the holes in the flanges of the panel. Screws go through the PCB and brace into the red lens.

Calibration

This module has a single calibration trimmer that is used to set the 1V / Octave. Set it to 4.265V initially and then fine tune to suit.

PCB Parts List

Module Parts List

PCB Layout