The recording time duration can be increased or decreased depending on the value of resistor R1 as follows: Recording stops after 20 seconds (selected by 52-kilo-ohm resistance in this case), pin 25 of IC1 becomes ‘high’ and LED1 stops glowing.

IC1 remains in recording mode as long as switch S1 is pressed and pin 27 of IC1 is grounded. You may have to vary VR1 to adjust for different microphones. Now you can speak close to microphone MIC1 in order to record your message. When switch S1 is pressed, LED1 glows to indicate that recording has started. The length of message recording depends on the value of external resistor R1 connected to its pin 7. IC APR9301-V2 is a high-quality voice recording and playback IC. 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 components. 1 shows the circuit of voice recorder and playback system. 1: Circuit of voice recorder and playback system Circuit and workingįig. It can be used in different types of applications such as door bells, railway announcement systems and automatic telephone answering devices. This voice recorder and playback system is built around a recording and playback chip that supports voice recording for 16 to 30 seconds and reproduces it clearly. You can leave a voice message for your family or friends whenever you go out, which they can hear by pressing the ‘play’ button. Here is a simple voice recorder and playback system for recording and playback of voice messages. TIP: To turn on the voice activated feature for recording, press and hold the button while you toggle the power switch to, wait for the indicator light to go off before you release the button.There are several types of voice recorder and playback systems available in the market but most of them are expensive and their circuits are also very complex to assemble.

– Fast forwarding/ rewinding an audio file while playing back – Deleting audio files on the go, without having to connect to a computer – Compact design makes it easy to fit in your pocket – Start recording faster w/ the voice activated mode – Use for up to 24 hours on a single charge – Store up 8GB of data or 96 hours of recordings – Delete files without having to connect to a computer – Timestamp recordings for easy reference Plus, with voice activated functionality, you can ensure you capture important audio without missing any vital details. So Small and Compact Enough To Carry In Your Pocket For Lectures, Meetings, Voice Memos and Note-takingīring it to class to record your lectures, jot down important notes during business conferences and meetings, play music without killing your phone’s battery, and take important files with you in a pinch. It fits easily into your pocket so that you are always able to keep it handy whenever you need it. Smaller than most flash drives and amazingly more versatile, the UQIQUE pocket-sized recorder is capable of capturing audio, playing music, and transporting files on the move.

Are you still recording important things using your smartphone?

Mini voice recorder with playback