Simmons PortaKit MIDI Drum Pads / Trigger. As well as a MIDI note number, each pad can have its own MIDI channel. Screen backlight has stopped working (see photo of screen - text is viewable at an angle).
Simmons Drum Module / Portakit Prototype MIDI Drum Module
Simmons Portakit Os V. 1.6 for Oled DIplay Firmware Update Upgrade eprom rom
Simmons Portakit Os V. 1.6 Firmware Update Upgrade eprom rom chip
Simmons Electronic Drums 1980's with SIMMONS SDS 1000 Drum Brain
DIY MIDI E-DRUM KIT NANO-8 FULL COMPLETE KIT (MIDI DRUM BRAIN)
Simmons SDS Vintage Drum Synthesizer bass drum XLR Trigger white Pad ref1
