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16 Key I2C keypad Switch Keypad 1x4 2x4 3x4 4x4 Matrix Array Matrix keyboard I2C Keypad Module for arduino
16 Key I2C keypad Switch Keypad 1x4 2x4 3x4 4x4 Matrix Array Matrix keyboard I2C Keypad Module for arduino
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1.Specification parameters
2.Photo Display
3.Packing & Delivery
The forarduino user quickly finds that the number of pins available to connect to external devices the user wishes to control is limited. A 12- or 16-key keypad uses 7 or 8 lines (although these same lines can sometimes be shared—Keypad library, liquid crystal display). Using keypads connected to the inter-ic (IIC or I2C) bus, only two forarduino pins and ground and the I2C bus can have many additional devices also simultaneously connected to the same two lines.
The Keypad_Dyrobot library extends the Keypad library so that a keypad requiring 8 lines or fewer connected to a Microchip I2C parallel-port behaves very nearly the same as one directly-connected to the precious forarduino pins. Moreover, two or more such connections can operate simultaneously to permit applications needing more than 16 keys.
2.Photo Display
3.Packing & Delivery