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Capacitive Sensor Circuit
#1
Hi All,

I have realized a very simple circuit that converts Capacity into Frequency that can be measured with Phyphox.
The basic circuit is an oscillator made up of 1/6 of an 74HC14. A small trick is used to feed the IC with the bias
of the microphone.
In fact you can use the 3.5 mm Jack to input triggers to the phone see attached reference sheet. Maybe also a possible input to Phyphox. ( The Timer would be nice... )

Enjoy,

Andries
PE1BMC


Attached Files
.pdf   Phone_Interface_V0.6_Schematic.pdf (Size: 512.9 KB / Downloads: 43)
.pdf   Android_3.5mm_Jack_Connections.pdf (Size: 134.34 KB / Downloads: 43)
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