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4 buttons touch keypad is a very useful, multi purpose product that can be used with many microcontroller boards especially Arduino platform.
The board operates between 2.5 V and 5.5 V. This means it is possible to use on 3.3 V systems like Raspberry Pi and 5 V systems like Arduino.
There are 6 pins on the board. These pins are supply voltage, ground voltage and outputs for each button. You may add touch keypad feature to your DIY projects with this useful board. This product dimensions are 35 x 29 mm.