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It is used in Mobile phones
neodymium magnet are also known as NdFebB magnets or Neo magnet and it is made from an alloy of neodymium
creating an environment suitable for the growth of moulds and mites
Multi-channel voice alarm or voice guidance equipment operation
LM393- Electret Microphone Module Mini Arduino It is used in MobileLM393 Electret Microphone module uses LM393 as its main Op Amp and is a single channel signal output sensor module. LM393 module has 3 pins which are Out, GND and VCC. GND is connected to the ground and VCC is connected to the positive terminal of the power supply. Out is an Output pin. Out pin is high when it does not detect any sound. It goes low whenever it detects sound in its surroundings. Out pin is connected to the digital pin of the
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