is it a change from 0.001 pF to 1.0pF,Hi everyone, I building my home project and I built capacitive sensor. When sensor detect value raise just between 0.5 and 1pF. I need this signal to amplify for use on arduino and I don't have many components. Can you help me?
Thanks in advance!
In theory, a circuit like this will give you a frequency shift from about 890 to 910 Hz. It is a big enough shift to hear with even average musical aptitude. But, theory and reality is all in parts selection and implementation.From ~ 50pF to 51pF
I figured, If you were making your own sensor, you'd want to make your whole sensor. But, yes, these are the parts you need if you know how to use SPI or I2C communication with a microcontroller (arduino). If one leg on your sensor is connected to ground, most of those will work. If you have a floating or non-grounded connection, then you'll have to search a bit harder. You are well into attoFarads at 16bits of real resolution at 20pF so you will have a bit of dynamic range to work with. Just make sure the chip you select can handle 50pF base capacitance and measure a difference from there. Sometimes a call to tech support or online chat gets a good recommendation of a part in a few minutes. Better than me searching through them for you.