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Posts Tagged ‘capacitive sensing’

NFC antenna tuning without a VNA

Monday, February 18th, 2019

Fred writes: Recently I started work on a new board. This one will be a front door entry system, so I decided to go with something that could read my NFC implant but also had a numeric keypad for the kids (and anyone else) to use. Not everyone wants to...

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Posted in PCBs | No Comments »

App note: Water-resistant capacitive sensing

Saturday, March 16th, 2013

This application note describes a new hardware sensing method which is resilient to water drops appearing on the surface of the touch sensing area.

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Posted in app notes | No Comments »

Capacitive touch sensing with a single ADC pin

Friday, May 11th, 2012

Capacitive sense buttons and pads are awesome, but many of the available systems are either propitiatory or require a dedicated IC. Toumas decided to code his own based on a closed source Atmel example where a single ADC pin is used for capacitive sensing. He reverse engineered it, and documented...

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Posted in AVR | 1 Comment »

App note: Layout and physical design guidelines for capacitive sensing

Sunday, October 30th, 2011

We think DIY capacitive touch sensing buttons, and sliders are cool. Designing and shaping your capacitive panels can be a pain. Here is an app note by Microchip that covers all the basics required to get your capacitive touch sensing project started. This app note starts with which pad shape...

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Posted in app notes | 5 Comments »

App note: Using Microchip’s capacitive sensing module

Saturday, October 8th, 2011

Capacitive sensing is used in tons of stuff like buttons, sliders, touch panels and proximity sensors. We like it because you only need to design the various buttons/sliders directly on the PCB and it works even under a face plate. It works by measuring the changing capacitance between a pad...

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Posted in app notes | 1 Comment »

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