Roland 182 Analog Sequencer

Overview The AM8182 is a replica of the Roland analog sequencer from the System 100M, the  182. It was introduced in 1978 as part of the System 100M and sold around 800 units, making it quite rare. It is a basic analog sequencer that provides 8 steps in 2 channels. Whilst it sold well in 1979 and 1980, by 1981 it was looking increasingly overshadowed by digital CV/Gate sequencers like the MC-8, MC-4 and CSQ range. In 1982 only ~20 modules were sold.

Original Design Roland streamlined the sequencer in the System 100 and moved to CMOS logic chips, and 8 steps rather than 12. They simplified the controls down to a START/STOP rather than START, STOP, RESET and CONTINUE.

Project Development I originally planned a Eurorack AM8182 module back in 2018 and started to layout the PCB. The arrival of the 182 as part of Behringer System 100 resulted in the project being stopped. However in late 2022 I restarted the project after locating a manufacturer that can make powder coated panels and realising that the Behringer 182 has some limitations.

The objective an accurate replica of the Roland 182 with more features than the Behringer 182;

  • Full sized rotary pots and knobs
  • Selectable voltage range (+3V,+10V)
  • Voltage range up to +10V

The AM8182 is wider as a result of the full sized controls, which also gives sufficient PCB space to use THD components. Behringer originally mocked up their 182 with voltage range switches, but there was not sufficient space for the slide switches and production modules have a fixed +5V voltage range. This rather limits the ability of the sequencer to sweep filter cutoff from zero to maximum.

There are two PCB’s in the AM8182; the PANEL PCB holds the switches, jack sockets and potentiometers, and the MAIN PCB contains the CMOS logic and analog clock. Roland style control knobs have been used throughout, along with a grey powder coated panel with white silk screen lettering. The unique font used by Roland for the module number (and System-100 text) has been recreated and used on the panel.

Outcome & Availability

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