This is a controller module, like a keyboard or a sequencer, only using a single large knob for pitch selection. It also features an internal Sample&Hold circuit for storing a voltage selected by the knob while turning the knob to the next voltage. 

CONTROLS-

1. Voltage Knob – This knob sets the output voltage.
2. Slew Knob – This sets the slew/portamento rate for the Sampled/Slewed output.
3. Gate/Trig Button – Pushing this button will generate a gate and trigger output and cause the Sample&Hold circuit to sample the current voltage from the voltage knob. 
4.Sample Select toggle – This toggle selects whether the Sample&Hold circuit is controlled by the gate or trigger, using the trigger will be a true Sample&Hold, while using the gate will be more of a Track&Hold. When using trigger, the slew should be set to a very fast rate. 

OUTPUTS- 

1.Direct Voltage Out – This is the direct output of the voltage knob. 
2.Sampled/Slewed Output – This is the output of the sample hold/slew circuit. 
3.Trigger Output – This is a very short +5V pulse that occurs when the button is pressed. 
4.Gate Output – This is a +5V pulse that remains high while the button is pressed.