ChipsHackadayabout 15 hours ago
A T9 Keyboard For Your Smartphone
2 min read
Jarrett built a custom T9 keyboard for modern phones using the keypad layout of a Nokia E52. The build uses a custom PCB with Alps SKRK tactile switches, an ESP32-C6 microcontroller, and Bluetooth connectivity. A second revision uses firmer 1.57 N switches for better feel.
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