Specification:
Item Type:Voice Recording Module Kit
Material: ABS
Operating voltage: DC 3 V - 5 V (recommended 5 V).
Recording time: 8S, 12S, 20S.
Circuit pin function: pin 11 is the positive pole of the power supply (VCC), pins 8 and 14 are connected to the negative pole of the power supply (GND), pin 1 is the recording port (REC), high level is valid, as long as REC gets high, the chip starts recording, 2 The pin is edge triggered playback (PLAYE), when at this end a High level appearappear, the chip starts playback and then starts playback, can release PLAYE, pin 13 is the end of the recording display (RECLED), in the recording state this end is low, can control LED, pins 4 and 5 are connected to the microphone input (MIC), pin 6 is connected to the end of the automatic gain control (AGC) the pins 7 and 9. with the speakeroutput (SP+, SP-), which can directly control the speaker via 8 Ω. Pin 10 is connected to the oscillation resistance (ROSC) and the oscillation resistance is connected to GND. Adjust the vibration resistor R4 connected to the ROSC connector to adjust the speed of the voice continuously. The shorter the recording time, the better the sound quality, and the longer the recording time, the worse the sound quality
Package list:
1 x voice recording module kit.
Note:
The resistance cannot be adjusted too small, it is recommended to be above 100 K.