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IFD:Printing Acoustic Interfaces/acoustic sensing circuits (view source)
Revision as of 13:53, 27 June 2019
, 27 June 2019→Printed Capacitive (Condenser) Microphone
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[[/transformer microphone and 555 timer oscillator (outdated circuits)/]] | [[/transformer microphone and 555 timer oscillator (outdated circuits)/]] | ||
==Printed Capacitive (Condenser) Microphone== | ==Printed Capacitive (Condenser) Microphone== | ||
However, the circuits where still | However, the circuits where still capable of sensing vibrations, because of another effect that was not anticipated, but stronger in the actual circuit: The '''capacitive effect''' of the two opposing coils. This capacitive effect can be made larger by providing a bigger overlapping area of the two conductors that form the microphonic surface. That simplified our print designs a little, because we were not forced to print coils as two port devices, but could use two rectangular shapes with a single port each. Leading to lesser connections and no jumper wires on our paper printed microphones. | ||
Our actual designs are sender-receiver type circuits, utilizing the radio frequency signal transmission as a means to get read of mains hum and other interferences. At the same time, this provides the flexibility to detect different frequencies with a single receiving circuit. | |||
[[File:microphone_amp_tl072_Steckplatine.png | thumb|left| TL072 Version ]] | [[File:microphone_amp_tl072_Steckplatine.png | thumb|left| TL072 Version ]] | ||