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Do projected capacitive touch panels need side clearance to ground metal?

Usually any PCAP controller will do a calibration at some point (either you do it once during manufacturing of your product or via some menu options, or it is done automatically at some interval) to ...
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How to make a variable light dimmer circuit without potentiometer?

I have done this several times, for testing etc I use 24VAC so I do not get hurt with the voltage and I get a reasonable close approximation to how it will operate. My last project was with a push ...
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3 votes

How do self capacitance touch screens work?

For the size of a normal cell-phone its self capacitance to earth is usually about 4pF. The capacitance of a finger touch to the screen for "self-capacitance" detection (as opposed to mutual ...
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1 vote

How do self capacitance touch screens work?

Some ascii because touch devices are not allowed to use the schematic editor: Two capacitors in series look like: -||-||- Capacitors are drawn as plates with no ...
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1 vote

Soil moisture sensor - Interdigital (FEF) vs Coplanar

check out this link https://authors.library.caltech.edu/4960/1/CHEloac04.pdf it easily explains the effective depth of water that can be sensed by sensor. it goes like so: T=a*sqrt((1+w/a)^2-1) where ...
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