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keyboard with dial

Overview

Numeric keypad with volume adjustment and backlight.

1. Implemented using a 32U4 controller (using Arduino pro micro). The chip has its own USB controller peripherals and can be developed using the HID open source library. 2. The volume adjustment uses an EC11 encoder, which has a built-in button for muting and other operations. 3. The keys use mechanical shafts, use a matrix keyboard to read the key status, and add capacitive hardware to debounce. 4. The backlight uses single-color 3mm edgeless LED lamp beads (3V), connected in series with current-limiting resistors, and multiple in parallel. 2N2222A is used to drive the LED diode to emit light, and the software supports PWM dimming. 5. The positioning plate has been drawn using PCB material and can be used directly.

Design Files

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Update:2025-05-06 12:19:11

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