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When one tactile key is pressed its corresponding pin with Rows and column intersection gets high logic
ensure the PSU matches their requirements
you can achieve a wide range of functionalities similar to a regular cell phone
High resolution: 0
1.54 inch E-ink Display Module, three colour 200X200 Heart Rate Pulse Sensor Module When one tactile key is1. 54 inch E ink Display Module This is an E Ink display or electronic ink display module, 1. 54inch, 200x200 resolution, with an embedded controller, communicating via SPI interface, supports partial refresh. E Ink display is communicating via SPI interface and it supports partial refresh. As these electronic ink displays have no backlight panels and it doesnt need a continuous power supply to display the (static data with periodic intervals) data on