no edit summary
(Created page with "thumb|center|417px thumb|center|800px == Experienced builders only! == '''CGS87''' the '''CGS programmer/s...") |
No edit summary |
||
Line 2:
[[File:cgs_photo_cgs87_prog.jpg|thumb|center|800px]]
== Experienced builders only! ==
'''CGS87''' the '''CGS programmer/sequencer''' module is a redesigned circuit board for the [[CGS programmer/sequencer (previous version)|CGS59 Programmer/Sequencer]]. Unlike that version, this one has no panel-format specific PCBs. The master PCB still exists, though is somewhat different in structure. The output amplifiers have also been made using TL074 instead of TL072 chips. The column boards have been replaced with boards that contain 8 stages. Pots and their mix resistors can be mounted on something like the [cgs94_pot_rail.html CGS94 pot carrier] if you want 1" horzontal spacing, or simply panel mounted and hand wired as was traditionally done.
The Programmer/Sequencer is a Serge inpired multi-stage sequencer. Unlike most sequencers, this one makes no use of binary counters. Rather, it uses a set of individual stages, each one directly accessible. As such it could be considered to allow "random access". The first sequencer produced by Serge was a 4017 based counter that put out gate pulses. In order to get a control voltage sequencer, the gate outputs were fed to the input stages of a multi-state programmer. Usually built in groups of four, but sometimes coupled through a switch, these programmers would only allow a single stage to be active at any time, outputting the corresponding control voltages to their bussed output jacks. The stages could be selected either via a gate/trigger input or a panel mounted push button.
| |||
