This circuit is a Digital Audio Player, which is activated by the passing of the object through the sensor.
This circuit can be incorporated with the donation box to give out some gratitude message or music etc, every time the donation is made through the sensor.
PLEASE NOTE This is quite a substantial kit, for more advanced people.
Specification
Power supply: 12VDC.
-At standby stage the circuit consumes about 15mA and at working stage about 250mA. at speaker 8-ohm 0.25W.
Time record: max. 80 seconds.
Select record signal from MIC or the external signal.
Build-in on-board audio power amplifier.
PCB dimensions of RX sensor unit: 1.41 in x 2.00 in.
PCB dimensions of TX sensor unit: 0.44 in x 2.00 in.
PCB dimensions of voice recorder unit: 2.00 in x 3.49 in.
TEST method
1. If you want to record a microphone on the board, short JM1 and JM2 to the MIC side and move the slide switch to REC.
2. Separate the sensor board from the main board.
3. Press SW1 after turning on the power. After the beep sounds, it will be in the melted standby state.
4. After recording, press SW1 switch to complete recording.
5. To play, move the slide switch to the PLAY side and press SW1.
6. After confirming the well-recorded sound, connect the sensor board and use it.