Schematic & Wiring Diagram

Voice Recorder using ISD1000A IC Circuit

The ISD1000A is usually a Primary Analog Hard drive device that allows you to store 20 seconds value of voice data on an IC chip which can be engage in backed at any time. The information recorded will stay in memory even if the power is removed. To apply the Voice Recorder using ISD1000A IC circuit easy apply power to the circuit, push the record switch and hold. Talk clearly in to the microphone. You will have up to 20 seconds of voice message that you could save. If you talk beyond that period the chip may simply save the first 20 seconds. After recording, release the record switch.

To playback the message, press the playback message and the message you recorded will play back. The microphone is definitely electret mic and the speaker is a 8 ohm speaker. If you are using a 16 ohm speaker then the 10 ohm resistor marked optional, can be eliminated. This circuit could possibly be the base of many other large projects. Such as it could be part of an alarm circuit which will plays back a voice alert when the alarm circuit is activated.