Hermod left
Hermod left is an open source STM32 PCB design by modern-hobbyist: a 2-layer, 3.6 × 3.3 mm board with 196 components (24 distinct parts). It is built around the STM32G474CETx, SRV05-4, XC6206PxxxMR-Regulator_Linear, CR2013-MI2120 and more. 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. III is a redesign of my original Hermod split keyboard. Some issues that were resolved in this version include: - Updated from the PRTR5V0U2X,215 to the SRV05-4 since the former is out of stock everywhere.
Furthermore, this is the NORTH FACING MX Spacing variant. While it is functionally identically to the Hermod Mk. II, this layout is spaced in a 19.05x19.05 grid, which makes it compatible with the Tai-Hao keycaps highlighted in the ZSA Voyager. Also, the switches are rotated 180• from the previous versions so that the LED's are better aligned with shine-through keycaps.
Built around
Parts list
196 components, 24 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32G474CETx | LQFP-48_7x7mm_P0.5mm | U1 |
| 2 | SRV05-4 | SOT-23-6-routable | U2, U9 |
| 1 | XC6206PxxxMR-Regulator_Linear | SOT-23 | U3 |
| 1 | CR2013-MI2120 | CR2013-MI2120 | U4 |
| 2 | ~ | Pogo_2.54mm_5p | U6, U7 |
| 1 | SN74AHCT1G125DBVR | SOT95P280X145-5N | U8 |
| 1 | MMUN2133LT1G | SOT-23-3 | Q3 |
| 2 | USB_C_Receptacle_USB2.0 | USB_C_Receptacle_HRO_TYPE-C-31-M-14 | J1, J3 |
| 1 | Conn_01x05 | PinHeader_1x05_P2.54mm_Vertical | J2 |
| 32 | gateron_ks33_hs_1U | KS33_Choc-v2_HS_1U | CH1, CH3, CH4, CH5, CH6, CH7, CH8, CH10 +24 |
| 8 | gateron_ks33_hs_1U | KS33_Choc-v2_HS_1.5U | CH2, CH9, CH16, CH23, CH30, CH36, CH37, CH38 |
| 2 | 500mA | Fuse_1206_3216Metric | F1, F2 |
| 1 | DFU | SW_SPST_TL3342 | RESET1 |
| 40 | choc_SK6812MINI-E | LED_choc_6028R | LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +32 |
| 40 | D | D_SOD-123 | D1, D2, D3, D4, D5, D6, D7, D8 +32 |
| 2 | 1N4148 | D_SOD-123 | D40, D41 |
| 41 | 0.1uF | C_0402_1005Metric | C1, C2, C3, C4, C5, C6, C7, C8 +33 |
| 3 | 100n | C_0805_2012Metric | C41, C42, C43 |
| 6 | 100nF | C_0402_1005Metric | C56, C102, C103, C104, C105, C108 |
| 1 | 10uF | C_0603_1608Metric | C101 |
Show 4 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 1uF | C_0402_1005Metric | C106, C107 |
| 3 | 5.1k | R_0402_1005Metric | R1, R2, R6 |
| 1 | 120 | R_0805_2012Metric | R7 |
| 2 | 68k | R_0805_2012Metric | R8, R9 |
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