Hi, I'm currently working on a project for Capacitive Touch-sensor behind a 0.3 mm Steel Cover.
I was wondering if anybody has experience with such a project.
Is the PCF 8883 suitable for doing the job ?
Hi Jan,
It should work properly, just an additional recommendation would be to avoid air gaps between the sensing plate and the dielectric (steel cover), in fact, if the sensing plate and the steel cover are touching this will increase the sensing area which means that the sensitivity would increase.
Here are some application notes that could be useful for this application:
AN10832 “PCF8883 and PCA8886 - capacitive proximity switch with auto-calibration” http://cache.nxp.com/documents/application_note/AN10832.pdf
AN11155 “General design guidelines for the NXP capacitive sensors” http://cache.nxp.com/documents/application_note/AN11155.pdf
Have a great day,
Jose
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Hi Jose
Thanks for your valuable answers it will help us a lot during the project !
Best regards and Have a nice day
Jan
Sent from iPad
Op 19 jan. 2016 om 22:04 heeft reyes <admin@community.freescale.com<mailto:admin@community.freescale.com>> het volgende geschreven:
NXP Community <http://jiveon.jivesoftware.com/mpss/c/-AA/PDcDAA/t.1ty/3bt7M5ChS56s4_IVFJG9WA/h0/eqhG5v9o4WV1pCmWaB03cUjBPgRj-2F3GoJUaXSZ409bQJ6kyiZ2Cef2qt-2B2uYN1YnWHaJNGi7m0dsLcrT7D0aEsRC9ydi8bGmPSoTrNqropzOzEJWlRcWGPjR3DG2V-2Fd9JgazgrYhAttaPsLKIUR-2FzQ-3D-3D>
PCF 8883
reply from Jose Alberto Reyes Morales<http://jiveon.jivesoftware.com/mpss/c/-AA/PDcDAA/t.1ty/3bt7M5ChS56s4_IVFJG9WA/h1/eqhG5v9o4WV1pCmWaB03cUjBPgRj-2F3GoJUaXSZ409bQnFOK00o-2FMItFkXWMeyx-2Fr-2BzmUjde-2BZny2kuFHrzaLsWAu7RZsM-2Bxn7-2B2e2pMMK9A-3D> in Sensors - View the full discussion<http://jiveon.jivesoftware.com/mpss/c/-AA/PDcDAA/t.1ty/3bt7M5ChS56s4_IVFJG9WA/h2/eqhG5v9o4WV1pCmWaB03cUjBPgRj-2F3GoJUaXSZ409bRIkJ0-2FxdZsf4dmjoFWbLvd2wKVAHG46aNpi1j8D3-2BDXOYfaINSEdo-2BM4Kef-2FDFK2Q-3D>