Fluxon
About the Fluxon PCB
Fluxon is an open source STM32 PCB design by AcheronProject, published on GitHub under the Custom license license. It is a 2-layer board measuring 241.6 × 71.7 mm, with 151 components from 90 distinct parts.
Its main chip is the STM32F072CBT6, from the STM32 family. Other key parts include the USBLC6-2SC6 and MCP1700-3302E/TT. By type, the board carries 59 switches, 53 diodes, 17 capacitors, 13 resistors, 3 ICs and 3 connectors.
It belongs with the keyboards and displays & leds designs in this gallery.
From the project
Fluxon is a QMK compatible replacement PCB for the Vortex Core powered by STM32F072CxT MCU.
See this page for the Fluxon PCB documentation (still not written yet as of june of 2020).
The Fluxon is a replacement PCB for the Vortex Core keyboard. It supports the default layouts of the Vortex Core, with a 1.75-2.75 split spacebar. The PCB also supports two extra bottom row layouts: one with a 6.25 spacebar one and other with a 7 unit spacebar. See the picture below for details.
Main components on the Fluxon
Fluxon bill of materials (BOM)
151 components, 90 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | USBLC6-2SC6 STMicroelectronics | SOT-23-6 | U1 |
| 1 | MCP1700-3302E/TT Microchip Tech | SOT-23 | U2 |
| 1 | STM32F072CBT6 STM32L072CBT6 STMicroelectronics | LQFP-48_7x7mm_P0.5mm | U3 |
| 1 | BSS138 AnBom | SOT-23 | Q1 |
| 1 | MUN5335DW1T1G ON Semiconductor | SOT-363_SC-70-6 | Q2 |
| 1 | ARM SWD | Conn_ARM_JTAG_SWD_6 | J1 |
| 1 | U-F-M5DD-W-2 | Korean-Hroparts_ U-F-M5DD-W-2 | J2 |
| 1 | Conn_02x10 | PinHeader_2x8_P2.54mm_Vertical | J3 |
| 1 | SL1210150 | Fuse_1210_3225Metric | F1 |
| 1 | K2-1187SQ-A4SW-06 SW_Push | K2-1187SQ-A4SW-06 | S1 |
| 1 | ESC | MX100 | SW1 |
| 1 | Q | MX100 | SW2 |
| 1 | W | MX100 | SW3 |
| 1 | E | MX100 | SW4 |
| 1 | R | MX100 | SW5 |
| 1 | T | MX100 | SW6 |
| 1 | Y | MX100 | SW7 |
| 1 | U | MX100 | SW8 |
| 1 | I | MX100 | SW9 |
| 1 | O | MX100 | SW10 |
Show 70 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | P | MX100 | SW11 |
| 1 | DEL | MX100 | SW12 |
| 1 | TAB_125 | MX125 | SW13 |
| 1 | A | MX100 | SW14 |
| 1 | S | MX100 | SW15 |
| 1 | D | MX100 | SW16 |
| 1 | F | MX100 | SW17 |
| 1 | G | MX100 | SW18 |
| 1 | H | MX100 | SW19 |
| 1 | J | MX100 | SW20 |
| 1 | K | MX100 | SW21 |
| 1 | L | MX100 | SW22 |
| 1 | QUOTE | MX100 | SW23 |
| 1 | ENTER_175 | MX175 | SW24 |
| 1 | LSHIFT_175 | MX175 | SW25 |
| 1 | Z | MX100 | SW26 |
| 1 | X | MX100 | SW27 |
| 1 | C | MX100 | SW28 |
| 1 | V | MX100 | SW29 |
| 1 | B | MX100 | SW30 |
| 1 | N | MX100 | SW31 |
| 1 | M | MX100 | SW32 |
| 1 | COMMA | MX100 | SW33 |
| 1 | DOT | MX100 | SW34 |
| 1 | (D) RSHIFT_125 | MX125 | SW35 |
| 1 | (D) FN_100 | MX100 | SW36 |
| 1 | (F) RSHIFT_225 | MX225 | SW37 |
| 1 | (I) RSHIFT_125 | MX125 | SW38 |
| 1 | (I) SLASH_100 | MX100 | SW39 |
| 1 | LCTRL_125 | MX125 | SW40 |
| 1 | SUPER_100 | MX100 | SW41 |
| 1 | LALT_100 | MX100 | SW42 |
| 1 | SPC_625 | MX625R | SW43 |
| 1 | RALT_125 | MX125 | SW44 |
| 1 | RGUI_100 | MX100 | SW45 |
| 1 | RCTRL_125 | MX125 | SW46 |
| 1 | BKSP | MX100 | SW47 |
| 1 | BKSP_2U | MX200 | SW48 |
| 1 | PN_100 | MX100 | SW49 |
| 1 | SPC_175 | MX175 | SW50 |
| 1 | SPC_275 | MX275R | SW51 |
| 1 | FN_100 | MX100 | SW52 |
| 1 | RALT_100 | MX100 | SW53 |
| 1 | LCTRL_150 | MX150 | SW54 |
| 1 | LALT_150 | MX150 | SW55 |
| 1 | SPC_700 | MX700R | SW56 |
| 1 | RCTRL_150 | MX150 | SW57 |
| 1 | RALT_150 | MX150 | SW58 |
| 48 | 1N4148W | D_SOD-123 | D1, D2, D3, D4, D5, D6, D7, D8 +40 |
| 3 | SK812MINI-E SK6812MINI-E | SK6812MINI_3535_6028_3.2x2.8mm_Round | D48, D49, D50 |
| 1 | RB060M-60TR ROHM Semicon | D_SOD-123 | D51 |
| 1 | SMF6.0A Microdiode Electronics | D_SOD-123 | D52 |
| 3 | 100n | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3 |
| 1 | 4.7nF | C_0805_2012Metric | C4 |
| 2 | 1u | CP_EIA-3216-10_Kemet-I_Pad1.58x1.35mm_HandSolder | C5, C6 |
| 1 | 4.7n | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C7 |
| 1 | 10u | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C8 |
| 4 | 100n | C_0402_1005Metric | C9, C10, C11, C15 |
| 2 | 4.7u | C_0402_1005Metric | C12, C16 |
| 1 | 1u | C_0402_1005Metric | C13 |
| 1 | 10n | C_0402_1005Metric | C14 |
| 1 | 1u | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C17 |
| 3 | 3R | R_SMD_1206 | R1, R2, R3 |
| 2 | 1k | R_SMD_1206 | R4, R6 |
| 1 | 510R | R_SMD_1206 | R5 |
| 1 | 1M | R_SMD_1206 | R7 |
| 3 | 100k | R_SMD_1206 | R8, R9, R13 |
| 1 | 100R | R_SMD_1206 | R10 |
| 1 | 100 | R_SMD_1206 | R11 |
| 1 | 33k | R_SMD_1206 | R12 |
Fluxon design files
The KiCad project lives in the AcheronProject/Fluxon repository on GitHub; these links point at the commit this page was built from.
- Layoutkicad_files/fluxon.kicad_pcb
- Schematickicad_files/fluxon.kicad_sch
Fluxon: common questions
What microcontroller does the Fluxon use?
The Fluxon is built around the STM32F072CBT6, from the STM32 family.
How big is the Fluxon PCB?
The Fluxon measures 241.6 × 71.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Fluxon?
151 components, from 90 distinct parts. The full bill of materials is listed on this page.
Where can I download the Fluxon design files?
From the AcheronProject/Fluxon repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Fluxon design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.
Can I test firmware for the Fluxon without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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