Microchip has unveiled mTouch Projected Capacitive Touch-Screen Sensing Technology, the first in a series of patent-pending releases supporting projected capacitive touch-screen solutions across the company’s portfolio of 8-, 16- and 32-bit PIC MCUs.
The technology announcement is supported by the release of the mTouch projected capacitive development kit, featuring the first device to implement the technology; the 8-bit PIC16F707.
Projected capacitive touch sensing extends resistive and existing capacitive touch sensing technology to include multitouch and gesture sensing, enabling users to implement robust glass-front user interfaces that simplify user interaction. Typical applications include global positioning systems, thermostats, mobile handheld units and other devices that use smaller displays with a finger input. The technology is available via a royalty free source code licence from Microchip’s online touch sensing design centre (www.microchip.com/get/AX10).
The development kit includes a 3,5” sensor mounted on a sensor board, a projected capacitive board with the PIC16F707 MCU and fully functional firmware. The open source code supports sensors with up to 32 channels and the kit includes a graphical user interface tool that enables easy parameter adjustment.
The PIC16F707 features two 16-channel capacitive sensing modules (CSMs) that can run in parallel for increased sampling speed, and operates from a wide input voltage range of 1,8–5,5 V, with a typical projected capacitive sensor application operating current of 1,5 mA at 5 V.
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