Voice Recorder and Playback Circuit APR 9301 Working and Applications Circuit Diagram

Voice Recorder and Playback Circuit APR 9301 Working and Applications Circuit Diagram As a result, voice or audio data are saved straight to the memory space in their organic form with virtually no compressions as done in digital technique, offering top quality, solid-state audio duplication. The circuit offers excellent audio recording using straightforward procedures.

Voice Recorder with 10 seconds Recording Time: This reference design implements a solid state voice recorder using MSP430F149 microcontroller to convert the analog voice pattern to digital with its integrated 12-bit analog-to-digital converter. The voice data is stored real-time in the MCU Flash memory and played back.

Voice Recorder and Playback Circuit Circuit Diagram

The proposed circuit of a programmable single chip voice recorder/player utilizes the IC APR9600 as the main processor of the circuit. It's a 28 pin IC which can be very easily and quickly configured for getting the required results by adding a handful of common passive electronic components.

Fig. 1: Image of a Voice recorder Circuit. With this circuit, you can record your voice and play back the same for 20 seconds. The voice recorder circuit is ideal for door phones, automatic answering devices etc. APR 9301 is used in the circuit which is a data storage and retrieval IC without any micro controller programming.

Industrial Grade Reference Design Circuit Diagram

Fig. 1: Circuit of voice recorder and playback system Circuit and working. Fig. 1 shows the circuit of voice recorder and playback system. The circuit is built around voice recording and playback IC APR9301-V2 (IC1), voltage regulator 7806 (IC2), npn transistor BC547 (T1), 8-ohm, 0.5W speaker (LS1), electret microphone (MIC1) and a few other The circuit of voice recording and playback is build around chip APR9600 (IC 1). The recordable sound is changed to voice signal using microphone and given to IC 1 through differential amplifier. This signal is further amplifier by inbuilt pre-amplifier and by connecting pin 21 to pin 20 via an external DC locking capacitor C 1 .