New answers tagged capacitive
1
vote
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 ...
- 3,477
0
votes
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 ...
- 2,819
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 ...
- 29.6k
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 ...
- 338
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
...
- 105
Top 50 recent answers are included