Numpad
Numpad is an open source PCB design by modern-hobbyist: a 2-layer, 92.1 × 99.3 mm board with 44 components (3 distinct parts). Filed under keyboards and displays & leds.
Collection of KiCad PCB designs for custom keyboards, including full-sized and split ergonomic layouts with STM32F072CBT6 microcontrollers.
Hermod Mk. II is a redesign of my original Hermod split keyboard, which in turn was my second keyboard design ever! Some issues that were resolved in this version include: - Better Pin choices for PWM Channels, Mk. I had some issues with timers overlapping - Added a handedness pin - Allows me to avoid using flash to store handedness - Switched to Full Duplex split comms - Mk.I was missing a 5.1kΩ resistor on the split serial line and this switched fixes that. - Switched to STM32G474CETx from the STM32F072CBT6 - More Ram, more flash, more fun. Didn't have enough ram for fun graphics on the LCD…
Parts list
44 components, 3 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | ~ | Pogo_2.54mm_5p | U1, U2, U3, U4 |
| 20 | ks33_hotswap_1U | KS33_Choc-v2_HS_1U | CH1, CH2, CH3, CH4, CH5, CH6, CH7, CH8 +12 |
| 20 | D | D_SOD-123 | D1, D2, D3, D4, D5, D6, D7, D8 +12 |
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eez-open