The A-179 is for converting different illumination intensities into corresponding analogue voltage and a gate signal derived from the analogue voltage. A sensor converts the illumination of the internal light sensor (light sensitive resistor / LDR) into a corresponding analogue 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-178but uses the illumination intensity instead of the distance between hand and antenna for generating the analogue 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