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KB-MAT-2X2 Micro Switch 2X2 Matrix 4 button module MCU development board for Raspberry Pi or Arduino
US$1.81
This is a MCU Development board Module 2 x 2 Matrix, 4 buttons for Raspberry Pi or Arduino. Connection: 4 Pin Female/Female Jumper Wire  or  Dupont...
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COM-14662 Keypad Numerical 12 buttons
US$7.00
COM-14662 Keypad Numerical 12 buttons This is a basic 12 button keypad that has been designed for easy user input and functionality. The buttons are set...
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Four Tactile PushButton Breakout Board
US$1.99

This is a small board with four tactile pushbutton pre-soldered and ready to connect to any project you have in mind. 

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Keypad - 16 Button (Alphanumeric)
US$8.14
This is a basic 16 button keypad that has been designed for easy user input and functionality. The buttons are set up in a matrix format which allows a microcontroller to ‘scan’ the 8 output pins to see which of the 16 buttons is being pressed.
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KB-MEM-1Y Yellow Button Matrix Keypad Membrane Momentary Pushbutton
US$2.79
This is a simple membrane momentary pushbutton that has a red dot in the center. The backside has a 3M tape allowing for easy mounting.
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KB-MEM-1R Red Button Matrix Keypad Membrane Momentary Pushbutton
US$2.79
This is a simple membrane momentary pushbutton that has a red dot in the center. The backside has a 3M tape allowing for easy mounting.
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KB-MEM-3YRG Red+Yellow+Green 3 Button Matrix Keypad Membrane Momentary Pushbuttons
US$4.19
This is a simple membrane momentary pushbutton with two pushbuttons. One is a red dot for the top, a yellow dot in the center for the center and on the bottom a green button.
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KB-MEM-2YR Red+Yellow 2 Button Matrix Keypad Membrane Momentary Pushbuttons
US$3.35
This is a simple membrane momentary pushbutton with two pushbuttons. One is a red dot in the center for the top and a yellow dot in the center for the bottom.
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KB-MAT-4x4 20 Pushbutton Breakout Board with 8 LEDs
US$3.99
This is a simple breakout board that features 20 pushbuttons, 16 of the black pushbuttons are designed to work as a pushbutton array requiring only 8 digital wires. 4 of the red push buttons are inversed logic, when the buttons is pressed it will go to ground and when not pressed the wires connected at the jumper pins will send signals to the microcontroller. You need an additional four digital pins if you choose to use this feature. You also are provided with 8 leds that offer their output signal to be grounded. This board is excellent for testing and learning array programming in C. This product comes with four standoffs M-F and nuts.
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KB-MEM-4X5 Keypad Membrane Switch 20 Key 4 x 5 Matrix
US$4.50
This device is a 20 (4x5) key position keypad membrane switch. Voltage DC: 12V. Current: 30mA. Contact Resistance: >=100 Ohm. Force: 250-350g. Contact Bounce: >1s. Pad Size: 85 x 73 x 0.8mm/ 3.3'' x 2.87'' x 0.03'' (L*W*T). Cable Length: 103mm/ 4''. Connector Pitch: 2.54mm/ 0.1''. Connector 9 positions.
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WAVE-3678, 8 Push Buttons
US$4.19
The Waveshare 3678 8 Push Buttons module provides 8 single push buttons in a small board.
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WAVE-105 5 IO Keypad
US$6.29

By using particular IO scanning detection, the 5 IO Keypad takes only 5 IOs to control all of the onboard push buttons and joystick. 10 push buttons, 1 joystick (five positions), 5-bit interface.

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1824-ADA 3x4 Phone-style Matrix Keypad
US$13.13
This keypad has 12 buttons, arranged in a telephone-line 3x4 grid. It's made of plastic with sturdy plastic buttons. The keys are connected to a matrix so you only need 7 microcontroller pins (3-columns and 4-rows) to scan through the pad.
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1616-ADA Adafruit Trellis Monochrome Driver PCB for 4x4 Keypad & 3mm LEDs
1616-ADA Adafruit Trellis Monochrome Driver PCB for 4x4 Keypad & 3mm LEDs
US$17.42
This item is just for the Trellis driver PCB assembly: LEDs and buttons not included. Trellis is an open source backlight keypad driver system. It is easy to use, works with any 3mm LEDs and eight tiles can be tiled together on a shared I2C bus.
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KB-MEM-4X4 Matrix Membrane Keypad w header
KB-MEM-4X4 Membrane Keypad w/ header
US$5.41
This keypad has 16 buttons, arranged in a 4x4 grid. It's made of a thin, flexible membrane material with an adhesive backing (just remove the paper) so you can attach it to nearly anything. The keys are connected into a matrix.
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