A coupon management system includes a synthetic barcode module. The synthetic barcode module comprises light management components and a controller. The light management components include an LED operating as both an optical receiver and an optical emitter. The LED receives light pulses and emits light pulses. The controller interfaces with a compatible electronic device such as a cell phone, receives codes corresponding to coupon barcodes, generates signals corresponding to light received by light management components via the LED, determines if the received light pulses correspond to scanner output, and outputs driver signals to cause the light management module to emit light pulses that emulate light reflected from a scanned barcode to communicate the coupon barcode optically. The controller determines if the received light pulses correspond to barcode scanner by checking stimulus timing (e.g., by determining if the timing of received light pulses corresponds to light pulses emitted from a barcode scanner). A signal conditioning circuit operably coupled to the LED and the controller improves a signal to noise ratio and supplies a logic level signal to the controller module corresponding to light received by the LED. The light management module includes an LED driver configured to regulate electrical power supplied to the LED.