<a href="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/MiniModular.jpg"><img src="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/MiniModular-300x199.jpg" alt="" title="MiniModular" width="40000" height="260" class="alignnone size-medium wp-image-1096" /></a>
The mini modular synth is a series of 4 circuit boards that offer a range of signal generators and processors.
The boards are designed to allow arduino style control "shields" to be connected via a row of input and output headers on either side. These control boards will hold miniature potentiometers and a bread board style patch bay. The emphasis of this design is on compact scale, sound experimentation and circuit development. It is not a traditionally "musical" synthesizer and is much better suited for abstract sound patterns than it is funky bass lines (although it <em>can</em> do funky if you get creative). I am able to make the circuits small and cheap by opting out of including features like 1 volt/oct tracking and exponential signal conversions. Those features are replaced with lots of ins and outs for cross modulating craziness.

UPDATE:
6/13/12
tested the VCF,VCA,VCO board and the S&H, RING MOD, RUNGLE board. It all works! 
Now to test the touch controller. fingers crossed
<iframe width="210" height="167" src="http://www.youtube.com/embed/8veuEzY6eVg?rel=0" frameborder="0" allowfullscreen></iframe>
6/13/12
I have assembled and tested the QUAD VCO. So far so good!
<iframe width="210" height="167" src="http://www.youtube.com/embed/6-3wz0EGizA?rel=0" frameborder="0" allowfullscreen></iframe>
6/7/12
The boards are in and building has begun.
<a href="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/minimodularsynth.jpg"><img src="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/minimodularsynth-224x300.jpg" alt="" title="minimodularsynth" width="224" height="300" class="alignnone size-medium wp-image-1092" /></a>


MODULES:  
<strong>1. QUAD VCO (wide range VCOs from LFO to audio)
2. VCO/VCA/VCF (single voice module)
3. S&H/RING/RUNGLE(modulation and complex sequencer)
4. TOUCH CONTROL,PROGRAMMER (touch controlled voltage and preset bank)</strong>
<strong>stacking control boards</strong>
Layout is standardized to allow easy connection with stacking interface and control boards, or jumpers can be run to panel mounted hardware on a custom interface. 
The stacking control board will enable the builder to connect all external hardware simply by plugging the control board on top of the module. 
I will design these once the PCBs have been tested. All pots and switches will be mounted on the board and I intend to use Arduino style headers and bread board jumpers for all modular signal patching which will make this a powerful and very compact system. 
<strong>PCB</strong>
<a href="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/MiniModularSynth.png"><img src="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/MiniModularSynth-461x1024.png" alt="" title="MiniModularSynth" width="450" height="1010" class="alignnone size-large wp-image-1060" /></a>

<strong>SCHEMATICS:</strong>
*For all intents and purposes these designs can be considered UNTESTED and will most likely be modified. I will remove this note once they are tested and confirmed fully working.* 

<strong>QUAD VCO V1.1</strong>
<a href="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/QUAD_VCOv1.1.png"><img src="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/QUAD_VCOv1.1-211x300.png" alt="" title="QUAD_VCOv1.1" width="211" height="300" class="alignnone size-medium wp-image-1078" /></a>

<strong>VCO/VCA/VCF V1.1</strong>
<a href="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/VCF_VCA_VCOv1.1.png"><img src="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/VCF_VCA_VCOv1.1-300x252.png" alt="" title="VCF_VCA_VCOv1.1" width="300" height="252" class="alignnone size-medium wp-image-1077" /></a>

<strong>S&H/RING/RUNGLE V1.1</strong>
<a href="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/SH_RING_RUNGLEv1.1.png"><img src="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/SH_RING_RUNGLEv1.1-205x300.png" alt="" title="S&amp;H_RING_RUNGLEv1.1" width="205" height="300" class="alignnone size-medium wp-image-1076" /></a>

<strong>TOUCH CONTROLLER V1.1</strong>
<a href="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/TOUCH_CONTROLLERv1.1.png"><img src="http://casperelectronics.com/wp-content/uploads/MiniModularNoiseSynth/TOUCH_CONTROLLERv1.1-244x300.png" alt="" title="TOUCH_CONTROLLERv1.1" width="244" height="300" class="alignnone size-medium wp-image-1075" /></a>
