Button Pads
There are several features on the back of the button pad worth noting.
- Contact rings -- The most important feature is probably the conductive ring molded into the back of each button. It makes contact with fingers on the printed circuit board.
- Recesses -- Each button also has a hollow cavity in it, leaving room for a 3mm or 5mm PTH LED.
- Vents -- There are little troughs in the rubber that allow air to escape when the button is pressed. This make it easier to press the buttons, and prevents them from suctioning onto the PCB.
- Bosses -- These are little pegs that interface with holes in the PCB, to keep the keypad from sliding around.
The Bezels
When the keypad is placed on the PCB, it is held in place by a set of brackets known as the "bezel."
There are actually four bezels in the wish list, two marked "bottom," and two marked "top." These designators indicate the positions the the bezels get installed in. The bottom bezels have tabs that stick out, and the top bezels have recesses those tabs fit into.
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Keypad, Capacitive Touch Pad, 16 Key Control Board
Proto-PIC
£3.50Keypad, Capacitive Touch Pad, 16 Key Control Board This low-cost capacitive touch pad/keypad can give your next project up to 16 capacitive switches using the TTP229 IC. This means that using only power, ground, and any 2 GPIO pins as clock and data...£3.50 -
Button Pad 4x4, Silicon Rubber, LED Compatible (COM-07835)
Sparkfun
£6.00Button Pad 4x4, Silicon Rubber, LED Compatible - Sparkfun COM-07835 This is a translucent silicon rubber button pad with 16 buttons. Each button has a hole underneath that accepts either a 3mm or 5mm standard LED.This Button Pad enables you can...£6.00 -
Button Pad 2x2 - LED Compatible
Sparkfun
£1.75Button Pad 2x2 - LED Compatible - SparkFun COM-07836 This is a translucent silicon rubber button pad with 4 buttons. Each button has a hole underneath that accepts either a 3mm or 5mm standard LED. The idea is that you can create a button interface of...£1.75 -
Button Pad 4x4 - Breakout PCB (COM-08033)
Sparkfun
£6.40Button Pad 4x4 - Breakout PCB - SparkFun COM-08033 This a simple breakout board for the button pads. Each LED and button is brought out to the side connectors. The connectors are soldered to the back side of the PCB. We recommend trimming the connector...£6.40 -
Button Pad 2x2 Top Bezel
Sparkfun
£1.75Button Pad 2x2 Top Bezel This is a black 1/8" ABS plastic bezel, custom made to mate with the silicon rubber pads.We use four 4/40-0.5" size screws matched with plastic standoffs to attach the 2x2 button pad and Simon project boards.Using two of these...£1.75 -
Button Pad 2x2 Bottom Bezel
Sparkfun
£4.20Button Pad 2x2 Bottom Bezel - SparkFun COM-08747 This is a black plastic bezel, custom made to mate with the silicon rubber pads. Black 1/8" ABS plastic.Using two of these bezels with two of the top bezels will create a 4x4 bezel appropriate for the full...£4.20 -
Button Pad 2x2 - Breakout PCB
Sparkfun
£4.00Button Pad 2x2 - Breakout PCB - SparkFun COM-09277 This a simple breakout board for the button pads. Each LED and button is brought out to the side connectors. The connectors are soldered to the backside of the PCB. We recommend trimming the connector...£4.00 -
Single Touch Switch
Proto-PIC
£2.50Single Touch Switch This easy to use capacitive touch switch can operate between 2V and 5.5V, so is ideal for using with your Micro:bit, Raspberry Pi, ESP8266 or Arduino. This module acts as a momentary button. When the module does not detect a...£2.50 -
4 Channel Touch Sensor Control Board
Proto-PIC
£3.504 Channel Touch Sensor Control Board This easy-to-use capacitive touch switch can operate between 2V and 5.5V, so is ideal for using with your Micro:bit, Raspberry Pi, ESP8266 or Arduino. This module acts as a momentary button.When the module does not...£3.50