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The design illustrated here will make a variety of interesting sounds using several emSynth modules working together. Read on for a description of how it works.
The Solar Power module provides power to all the modules, simple as that - just plug it into the power bus to get VDD=3VDC. We begin with two Oscillator modules, feeding them into the Ring Modulator to create some interesting square wave sounds. Then we connect the Ring modulator output to a Sine Wave Thing module input to get a somewhat smoothly varying stepped sine wave signal with Ring Modulator awesomeness. The output of the Sine Wave Thing goes into a Spacializer module along with the other two oscillators (into A In and B In control inputs) for some really nice bounce-around spacialization. The stereo outputs of the Spacializer go into a Stereo Out module into which we plug our headphones or 1/8" cable to computer or other equipment.
Ta-da! We've got sound! and wild, wacky sound at that - set the potentiometers on the Hex Oscillator module for unique spacialization and "play" the synth by adjusting the potentiometers. Groovy!
The whole thing fits on a single half-sized breadboard due to the extreme space conservation of emSynth. To build this circuit on a breadboard at chip level would easily require three or four of those half-breadboards and at least 50 if not 100 wires. Then when you were done with the synth and wanted to reuse the breadboard, you'd be ripping out all those wires and chips, whereas reuse of the emSynth system is simple and easy. Now you see the incredible advantages of going modular with emSynth!