=== Sinulator ===

==== About the Sinulator ====

The Sinulator is a Eurorack module based on our SineCore Modulator, built in collaboration with West Oakland Music Systems (WOMS).  It is an improved version of the SineCore Modulator with +/-1080 degrees of modulation before distortion.  There is also an integrated VCA and offset/gain knobs for both the VCA and modulator.  The Sinulator can be used as a sine wave shaper, converting either a ramp wave or sawtooth wave into an extremely low distortion sine wave.  It can also be used as a wavefolder with up to 6 folds in either polarity, controllable by the VCA CV.  Finally, it can be used as an FM modulator with through-zero capability.

==== How to use the Sinulator ====

==== Modifications ====

As with all Open Music Labs projects, we encourage tinkering with electronics.  The Sinulator has a few patch points that can be used to extend its range.

 * Linear output VCA - The final output of the Sinulator can be amplitude modulated with an external CV.  This can be done either linearly or exponentially.  For linear control, cut the trace between the 2 pads of J2, and apply a 0V to 5V signal to pin2 of J2 (the round pad).  if you want 0V to 10V control, add a 36k resistor in series with your input CV.  Use an input jack that is normalled to +5V, so that the output enabled when no signal is present.

 * Exponential output VCA - For exponential CV control, cut the trace between the 2 pads of J7, and place a 1k resistor between those 2 pads.  Next, connect a 47k resistor from pin1 of J7 (the square pad) to your CV input.  Finally, cut the trace between the 2 pads of J2 and place a 1M resistor between these 2 pads.  This will allow a -5V to +5V signal to set the output from -60dB to full open.

 * Wider offset range - the phase offset knob controls the output over +/-180 degrees.  To increase this range over the full +/-1080 degrees, and into the distortion region, place a blob of solder on J8 such that both pads are now connected.

==== Documentation V1 ====

 * [[attachment:sinulator3_brd.png|board image]] [[attachment:sinulator3.brd|board eagle file]]
 * [[attachment:sinulator3_sch.png|schematic image]] [[attachment:sinulator3.sch|schematic eagle file]]
 * [[attachment:audioint.lbr|library eagle file]]
 * [[attachment:sinulator3.zip|board gerber files]]
 * [[attachment:sinulator_bom.ods|parts listing ODS]][[attachment:sinulator_bom.pdf|parts listing PDF]]

==== Documentation V1.1 ====

C14 moved from ground to negative voltage rail to improve noise immunity on the LM13700 current source.

 * [[attachment:sinulator4_brd.png|board image]] [[attachment:sinulator4.brd|board eagle file]]
 * [[attachment:sinulator4_sch.png|schematic image]] [[attachment:sinulator4.sch|schematic eagle file]]
 * [[attachment:audioint.lbr|library eagle file]]
 * [[attachment:sinulator4.zip|board gerber files]]
 * [[attachment:sinulator_bom1.1.ods|parts listing ODS]][[attachment:sinulator_bom1.1.pdf|parts listing PDF]]