Membrane Matrix Keypad With The Raspberry Pi Video Tutorial
This 16-button keypad provides a useful human interface component for microcontroller projects. Convenient adhesive backing provides a simple way to mount the keypad in a variety of applications. Approximate size: 69 x 77mm. It's made of a thin, flexible membrane material with an adhesive backing so you can attach it to nearly anything. The keys are connected into a matrix, so you only need 8 microcontroller pins (4-columns and 4-rows) to scan through the pad. Check the tutorials tab for links to an Arduino library and example code.
Quick Spec
- Maximum Rating: 24 VDC, 30 mA
- Interface: 8-pin access to 4x4 matrix
- Operating temperature: 0 to 50°C
- Dimensions Keypad: 69 x 76mm
- Dimensions Cable: 20 x 88mm
Internal Connections
Alternative Method to read Keypad via Analog Pin
If your IO pins on you Arduino is limited, this method below use a resistor network and each switch pressed has a unique analog voltage
Resistor values
- a = 15k
- b = 1.5k
- c = 1.5k
- d = 15k
- e = 4.7kΩ
- f = 4.7kΩ
- g = 2.2kΩ
Resources
Application circuit and code example
Below is a simple Arduino Application circuit
Step 1 - Download keypadmaster.zip from Github and import into Arduino ide
Shipping List
- 1 x 16-Key Membrane Switch Keypad
Membrane Keypad 4X4
- Brand: Generic
- Product Code: MEM-4X4-BR
- Weight: 0.008kg
- Product Status : Active
Stock
| Warehouse | Stock Status | Location |
|---|---|---|
| Centurion | In Stock | UE070 |
| Stellenbosch | In Stock | C0259 + C0260 |
We ship free of charge between branches to complete your order.
-
R17.00 (Inc Tax: R19.55)
-
- 5 or more R15.00
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