There are no COTS sensors capable of doing this. The military and police still use dogs to detect smells, but they can't be connected to electronics.
microphone............
electrical signal can be converted to an optical sigal by using a LED or SOA(semiconductor optical amplifier). LED is the cheaper option but have the drawback of larger linewidth. Typically used for LAN (local area network). SOA produces an optical signal mostly by direct modulation tecnique .
different method are available for converting voice signal to volage ......one method is sence presure variation from the out put of mic by using presure tranducer ..out of transducer should be a volage .this volage is amplified by using amplifier cicuit and it amplified signal or volge is store in to battery or other storig device.......
When you convert digital signal to analog, it is called as an analog signal. The device used is called digital to analog converter.
Your question is quite incomplete. If you want to convert a PwM (pulse width modulated) infrared signal, just pass on the width info to a fixed carrier wave (amplitude modulate it), and the job is done. At the other end, demodulate using standard If stage as in any superheterodyne radio reciever.
microphone............
a pressure transmitter is a devise to measure the mechanical pressure and convert in to electrical signal it may be 4~20mA or 0~10V
An electromagnet is used to convert electrical signal to speech signal. It is made up of a metal coil which produces magnetic field when current is passed.
To convert the users voice into an electrical signal, so that it may be transmitted to the person they're in conversation with.
electrical signal can be converted to an optical sigal by using a LED or SOA(semiconductor optical amplifier). LED is the cheaper option but have the drawback of larger linewidth. Typically used for LAN (local area network). SOA produces an optical signal mostly by direct modulation tecnique .
A load plate, or load cell, is a transducer that is able to convert a force placed upon it to an electrical signal. This signal can be deciphered to offer a weight value in standard measurements.
Modulating Signal,
convert the electrical resistance signal from wiper switch to electrival power to wiper motor (for delay wipers)
A transducer is device for converting a non-electrical signal into an elct one. The result is action potential Example: conversion of light energy into electrical signals in the retina of the eye
A load cell is a transducer which converts force into a measurable electrical output. Although there are many varieties of load cells, strain gage based load cells are the most commonly used type.
No. Power can't be amplified, because to do so would require the creation ofenergy, which is always a no-no. However, a circuit with small power can beused to control a circuit with large power derived from somewhere else. Soif you can maintain sufficient power-input to the high side, the whole operationhas the appearance of having amplified the low power. The best example of thatprocess is any radio receiver.
different method are available for converting voice signal to volage ......one method is sence presure variation from the out put of mic by using presure tranducer ..out of transducer should be a volage .this volage is amplified by using amplifier cicuit and it amplified signal or volge is store in to battery or other storig device.......