This relay driver circuit has multiple utility. It can be integrated to other circuits for a specific application.

This circuit can record (in digital format) and play back any voices which were then stored in the IC (aPR33AX_C2). The playing back voices can be used in public relations and advertising campaigns as well as the humanization of a donation box.

This circuit is a Digital Audio Player which can be activated by the passing of the object through the sensor. Any voice not more than 680 seconds in duration can be digitally recorded on to the IC1 via MIC or external signal input. This circuit can be incorporated with the donation box to give out some gratitude message or music etc., every time the donation was granted through the sensor.

This sensor circuit features a modulated infrared signal to reduce the effects of incidental lighting. Ideal for use with voice recording (such as MXA110) and advertising media system.