Design of handwriting board based on touch-key
Long Xiao-cu · Electronic Design Engineering · 2015
This paper use the pad making touch keys to form a touch area on the PCB,to realize the hardware design of touch tablet.The design use the low power MSP4302553 as the core tablet touch detection.Through the experimental study method,This paperanalysis of the effect of the touch key sizes and touch panel resolution, the distance from pad to controllerand routing mode, and the distance between the keys on the handwriting detection.On the basis of the accurate detection of single touch key,we select the appropriate parameters of handwritten board design, and accurately acquiring handwritten input information of the two value image of users.Designing of touch tablet on PCB,has the characteristics of simple design, low cost, abrasion resistance, not easy to be damaged.