Touch Keyboard Module

The 4 4 touch keyboard module is an input device used to input data into a computer or other electronic device. Each key of this keyboard is a capacitive touch design, with a layout of four rows and four columns, and each key represents a specific character. When a finger touches a key, it causes a corresponding change in the capacitance of the touch key. Once the detection circuit connected to the key detects this capacitance change, it outputs information that the corresponding key has been pressed. Application reference: password doors, calculators, ATM machines, mobile phones, etc. Click to explore: Touch Keyboard Module Parameters Value/Description Operating voltage 3.3V~5V Operating temperature -40 C~+85 C Communication method I2C Size 5.6cm*7.8cm