A-179 Light Controlled Voltage Source

Module for converting different illumination intensities into corresponding analog voltage and a gate signal derived from the analog voltage. A sensor converts the illumination of the internal light sensor (light sensitive resistor / LDR) into a corresponding analog control voltage. The internal sensor is located at the front panel (int. LDR) of the module but a remote sensor may be connected via cable to the module (jack: ext. LDR). Thus the module A-179 is similar to the Theremin module A-178 but uses the illumination intensity instead of the distance between hand and antenna for generating the analog voltage.

• Inputs: ext. sensor

• Outputs: normal CV, inverse CV, Gate

• Controls: Offset voltage (for adjusting the CV to 0V for the desired illumination), Gate threshold

• Displays: 2 LEDs for CV (positive/negative), 2 LEDs for inverse CV (positive/negative), 1 LED for Gate

Applications:

• controlling any voltage controlled parameter of the A-100, e.g. pitch or pulswidth (VCO A-110), loudness (VCA A-130/131/132), panorama (A-134), filter frequency or resonance (A-120/121/122/123), phasing (A-125), frequency shift (A-126), resonance peaks (A-127), envelope parameters (A-141/142), tempo (A-147), passive control by covering/shading the sensor via hand or body, active control by using pocket lamp/flashlight/laser.
• triggering of A-100 activities via gate with adjustable threshold, e.g. starting an envelope (A-140/141/142), Start/Stop of a sequence (A-155), any switching function (A-150/151)
• Conversion into MIDI control change messages is possible with the A-192.

For more detailed information please look at the English user's guide alternatively as html file (for browser view) or as pdf file (for printout).