9090

A few photos and a brief (and bad) video of my 9090 drum machine. This is a clone of the Roland TR-909 voices, without the sequencer, designed by Trevor Page. Yes it is attached to a piece of cardboard, but this is temporary! For more information on the 9090 see: http://www.introspectiv.org/

I intend to build a sequencer, based on the MidiBox Seq V4. For more on this visit: http://www.ucapps.de/ (MidiBox) and http://www.synthage.com/ (the sequencer control surface).

Board 1 part completed. This contains the power supply, noise generator, bass, snare, low tom and mid tom drums.

Completed board 1

Completed board 2 comprising high tom, rim shot, hand clap, hi-hats and cymbals, plus the MIDI interface. The three large ICs are EPROMs containing the samples for crash and ride cymbals and hi-hats. All other voices are analogue.

The rather temporary card panel with potentiometers attached.

Close up of the EPROMs on board 2, also showing some of the rare parts - three types of long discontinued Japanese transistors.

The 9090 in action.