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ISD1820 is a small Voice Recorder and Playback module that can do the multi-segment recording
They are all designed to measure Barometric Pressure or Atmospheric pressure
The 4-bit inputs are weighted (A0 to A3 and B0 to B3)
household appliance
VCC For 5v if use with 5v level system Such as ( Arduino UNO
CD 4012 Dual 4-Input NAND Gate charger ISD1820 is a small VoiceIntroduction : CD 4012 Dual 4 Input NAND Gate provide the system designer with direct implementation of the NAND function and supplement the existing family of CMOS gates. All inputs and outputs are buffered. Features : Wide supply voltage range 3. 0V to 15V. Low power 10 nW (typ.). High noise immunity 0. 45 VDD (typ.). Two Independent 4 input NAND Gates. Operating Temperature to 85oC.
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