sammichFM was designed to be the “no excuses†MIDIbox FM synthesizer kit – i.e. for all those people who want a MIDIbox FM but consider building it with modules too time-consuming, too newbie-unfriendly and/or too hard to design and construct a control surface.
sammichFM therefore has the following design constraints/features, which support each other: looks a lot like sammichSID cheap (relative to fully modular MIDIbox FM with “pro-looking†control surface) small DIY newbie friendly minimal control surface single “walwartâ€/AC adapter supply, no bipolar PSU and mains power wiring! sandwich-style†stacked PCB design, no wires! laser-cut 3mm acrylic case by Ponoko, customization possible industry standard 2×20 character LCD, customization possible common control surface parts used, customization possible available as a complete kit, including PCBs, components, case, hardware and new OPL3 chipset! One Core module and one OPL3 module, fully integrated on one PCB with power supply. 4 simultaneous instruments of 6 voice polyphony each, plus drum kit. Each voice is a 4 operator waveform. Each instrument can be routed to one of four audio outputs, via two stereo 1/4″ phono jacks. Five “BankStick†slots, so you can store 5 banks of 128 patches, 32 “Ensembles†and 16 “Drumsets†Minimal control surface with up/down arrow buttons for fast menu scrolling. 2×20 character LCD with support for low-power (25mA) or high-power (250mA) LED backlight. Potential for future upgrade to 32-bit microcontroller via an undocumented “daughterboard†header.
More details on this Wiki page, discussions in http://vimeo.com/20854289?pg=embed&sec=20854289 sammichFM Assembly video made by Siempre La Luna (featuring backing track by TK!)