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LCD Display and Keypad controller connected to Raspberry Pi via i2c - Releases · cbaurtx/Raspberry-I2C-LCD-and-Keypad ...
Arduino password system using an I2C keypad with a PCF8574 I/O expander and a 20x4 LCD. Enter a password using the keypad; correct or incorrect status is displayed. The # key submits the password, ...
I2C connectivity is over a four-pin STEMMA connector, and logic-level serial UART data is over a four-pin 0.1 inch pin header. [Cliff] plans to release the firmware and schematics as open source ...
A new pre-assembled front panel, the VP4546, integrates a graphic LCD module with a customizable keypad. Targeted at low-volume user-interface applications such as instrumentation ...