AM104 Analog Sequencer

Overview The AM104 is a project to build a replica of the Roland analog sequencer 104 that was introduced in 1976 as part of the System 100. It is a basic analog sequencer that provides 12 steps in 2 banks. The project started in the winter of 2017 with the laying out of the main controller PCB and the setting of some design parameters. The project follows closely the original design and size.

Rationale  The driver for the project is two fold; 1) Build a 12 step sequencer like the Synthanorma SQ312 that Klaus Schulze used. 2) Subsequently build a replica of the Roland  718A sequencer as the unusual chip set is the same.

Project Status  I bought a tube of Sanyo LB1501/1515 chips many years, as a starter for this project. In the winter of 2017 I started to lay out the main controller PCB using the same layout and dimensions as the original. The plan is to have a second large PCB that holds all the panel components. The DP12T rotary switch is going to be the expensive component to source. I may add an ARP 1601 quanitizer.


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