Membrane 1x4 Keypad + Extras
4-button membrane keypad with individual wire per key (no matrix scanning needed), adhesive backing, and an included 5-pin extra-long header strip for direct breadboard insertion.
Pinout
- COM
Common switch return for the 1x4 membrane keypad; Adafruit states the keypad has four buttons, each key has its own wire line, and includes a 5-pin header strip.
Type · signal - KEY1
Individual normally-open switch line for one keypad button; treat as an everyday switch/digital input per Adafruit product description.
Type · signal - KEY2
Individual normally-open switch line for one keypad button; treat as an everyday switch/digital input per Adafruit product description.
Type · signal - KEY3
Individual normally-open switch line for one keypad button; treat as an everyday switch/digital input per Adafruit product description.
Type · signal - KEY4
Individual normally-open switch line for one keypad button; treat as an everyday switch/digital input per Adafruit product description.
Type · signal
Start wiring
I2C · Analog · USB · 3.3 – 5 V · Breakout
Module pins: COM, KEY1, KEY2, KEY3, KEY4. Schematik maps them to your board in the app.
Keypads
36 other optionsMatrix keypads, analog ADKey boards, I2C keypad controllers, joysticks, and finished USB-HID keyboards are all here. Pin budget and simultaneous-press requirements are the splits that matter.
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