Design of voice recording and playback circuit module composed of HY560

This circuit is a simple recording circuit that is small in size, saves power, and does not require tape.

Circuit working principle: This circuit realizes the circuit function by applying a fully electronic digital recording integrated circuit HY560. The interior of HY560 contains: microphone amplifier circuit, automatic gain control circuit, analog/digital conversion circuit, digital/analog conversion circuit, static It is composed of memory, logic control circuit, audio amplifier and other units. When in use, press SB1 (recording button), the sound signal will be received by the microphone B1 and converted into an electrical signal. After passing through the microphone amplification circuit, it will be converted into a digital signal and stored in the static memory. When button SB2 (playback button) is pressed, the stored digital recording signal is taken out from the static memory. After passing through the digital/analog conversion circuit, the digital signal is converted into an analog signal (electrical signal). After passing through the audio amplifier circuit, to drive speakers to produce sound.