2 layers251.2 × 81.3 mm
2 layers251.2 × 81.3 mm
2.0 hotswap flex
therick0996/lucyAn 4x12 ortho plus macro column keyboard.
- Size
- 251.2 × 81.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 138
- Nets
- 95
- Pads
- 602
- Tracks, vias
- 1,181, 98
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 23 Jul 2020
- Updated
- 6 May 2026
Overview
2.0 hotswap flex is an open-source printed circuit board by therick0996, from the therick0996/lucy repository on GitHub. It is a 2-layer board of 251.2 × 81.3 mm with 138 parts on 95 nets, routed with 1,181 tracks and 98 vias.
It is built around the ATMEGA32U4 and PRTR5V0U2X. Its parts include 54 switches, 53 diodes, 8 connectors, 5 capacitors and 5 resistors. It belongs with the keyboards and input boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mdLucy
An 4x12 ortho plus macro column keyboard.
USE AT YOUR OWN RISK!!! I am not responsible for any dumb things you do. Like fry your computer, your partner leaves you, etc.
FAQ:
Does it have MIT/2x2u/etc.?
No. Grid for life
Does it have backlighting?
No
Does it have RGB?
No
Does it have hotswap?
No Fine
Does it have Alps support?
No
Choc support?
No
Flex cuts?
No, they're a dead meme
Encoder?
See flex cuts
Will you add any of these?
No
Why not?
Because
Parts
138| Qty | Value | Footprint | References |
|---|---|---|---|
| 52 | D | Keeb_footprints:D_SOD-123_modified | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +36 |
| 51 | KEYSW | MX_Only:MXOnly-1U-Hotswap | K1, K2, K10, K12, K13, K14, K15, K16, K17, K18, K19, K20, K21, K23, K24, K25 +35 |
| 5 | Conn_01x01 | TestPoint:TestPoint_Keystone_5000-5004_Miniature | J3, J4, J5, J6, J7 |
| 5 | MountingHole | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H1, H2, H3, H4, H5 |
| 3 | .1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, RSW1 |
| 2 | 22 | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2, R3 |
| 2 | 22pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | CX1, CX2 |
| 2 | 5.1k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | RCC1, RCC2 |
| 1 | .5A | Fuse:Fuse_0805_2012Metric_Pad1.15x1.40mm_HandSolder | F1 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 16MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C6 |
| 1 | 4PIN | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J8 |
| 1 | ATMEGA32U4 | Keebio-Parts:ATMEGA32U4-AU | U1 |
| 1 | AVR-ISP-6_mod | Keeb_footprints:ICSP-Header_small_pins | J2 |
| 1 | KEYSW | MX_Only:MXOnly-1U-NoLED | K49 |
| 1 | LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | LED1 |
| 1 | PRTR5V0U2X | Keebio-Parts:SOT-143B | U2 |
| 1 | Rotary_Encoder_Switch | Keebio-Parts:RotaryEncoder_EC11 | SW2 |
| 1 | SW_PUSH | random-keyboard-parts:SKQG-1155865 | SW1 |
| 1 | TYPE-C-31-M12_13 | Keeb_footprints:TYPE-C-31-M-12 | J1 |
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Questions
How big is the 2.0 hotswap flex PCB?
It measures 251.2 × 81.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 2.0 hotswap flex use?
138 parts, built around the ATMEGA32U4 and PRTR5V0U2X. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the 2.0 hotswap flex KiCad files?
From the therick0996/lucy repository on GitHub, at the commit this page was made from: the board is old_versions/2.0 hotswap_flex/pcb.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the 2.0 hotswap flex design in my own project?
Its repository states no licence, so its author keeps all rights: ask therick0996 before reusing the design.