TKLTheSecond
About the TKLTheSecond PCB
TKLTheSecond is an open source STM32 PCB design by Denrage, published on GitHub. It is a 2-layer board measuring 360 × 140.1 mm, with 210 components from 111 distinct parts.
Its main chip is the STM32F401RETx, from the STM32 family. Other key parts include the xc6206p332mr, L_TILDE, L_Escape, L_TAB and L_CAPS. By type, the board carries 91 ICs, 89 diodes, 14 capacitors, 9 resistors, 3 connectors and 3 switches.
It belongs with the keyboards designs in this gallery.
From the project
QMK TKL Keyboard from Scratch
Main components on the TKLTheSecond
TKLTheSecond bill of materials (BOM)
210 components, 111 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32F401RETx | LQFP-64_10x10mm_P0.5mm | U1 |
| 1 | xc6206p332mr | SOT-23 | U2 |
| 1 | L_TILDE | LED_RGB_5050-6 | U3 |
| 1 | L_Escape | LED_RGB_5050-6 | U4 |
| 1 | L_TAB | LED_RGB_5050-6 | U5 |
| 1 | L_CAPS | LED_RGB_5050-6 | U6 |
| 1 | L_LSHIFT | LED_RGB_5050-6 | U7 |
| 1 | L_1 | LED_RGB_5050-6 | U8 |
| 1 | L_F1 | LED_RGB_5050-6 | U9 |
| 1 | L_Q | LED_RGB_5050-6 | U10 |
| 1 | L_A | LED_RGB_5050-6 | U11 |
| 1 | L_LCTRL | LED_RGB_5050-6 | U12 |
| 1 | L_SPACE1 | LED_RGB_5050-6 | U13 |
| 1 | L_Z | LED_RGB_5050-6 | U14 |
| 1 | L_2 | LED_RGB_5050-6 | U15 |
| 1 | L_F2 | LED_RGB_5050-6 | U16 |
| 1 | L_W | LED_RGB_5050-6 | U17 |
| 1 | L_S | LED_RGB_5050-6 | U18 |
| 1 | L_LWIN | LED_RGB_5050-6 | U19 |
| 1 | L_X | LED_RGB_5050-6 | U20 |
Show 91 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | L_3 | LED_RGB_5050-6 | U21 |
| 1 | L_SPACE2 | LED_RGB_5050-6 | U22 |
| 1 | L_F3 | LED_RGB_5050-6 | U23 |
| 1 | L_E | LED_RGB_5050-6 | U24 |
| 1 | L_D | LED_RGB_5050-6 | U25 |
| 1 | L_LALT | LED_RGB_5050-6 | U26 |
| 1 | L_C | LED_RGB_5050-6 | U27 |
| 1 | L_4 | LED_RGB_5050-6 | U28 |
| 1 | L_F4 | LED_RGB_5050-6 | U29 |
| 1 | L_R | LED_RGB_5050-6 | U30 |
| 1 | L_F | LED_RGB_5050-6 | U31 |
| 1 | L_V | LED_RGB_5050-6 | U32 |
| 1 | L_SPACE3 | LED_RGB_5050-6 | U33 |
| 1 | L_5 | LED_RGB_5050-6 | U34 |
| 1 | L_F5 | LED_RGB_5050-6 | U35 |
| 1 | L_T | LED_RGB_5050-6 | U36 |
| 1 | L_G | LED_RGB_5050-6 | U37 |
| 1 | L_RALT | LED_RGB_5050-6 | U38 |
| 1 | L_B | LED_RGB_5050-6 | U39 |
| 1 | L_6 | LED_RGB_5050-6 | U40 |
| 1 | L_F6 | LED_RGB_5050-6 | U41 |
| 1 | L_Y | LED_RGB_5050-6 | U42 |
| 1 | L_RWIN | LED_RGB_5050-6 | U43 |
| 1 | L_H | LED_RGB_5050-6 | U44 |
| 1 | L_N | LED_RGB_5050-6 | U45 |
| 1 | L_F7 | LED_RGB_5050-6 | U46 |
| 1 | L_7 | LED_RGB_5050-6 | U47 |
| 1 | L_U | LED_RGB_5050-6 | U48 |
| 1 | L_MENU | LED_RGB_5050-6 | U49 |
| 1 | L_J | LED_RGB_5050-6 | U50 |
| 1 | L_M | LED_RGB_5050-6 | U51 |
| 1 | L_F8 | LED_RGB_5050-6 | U52 |
| 1 | L_8 | LED_RGB_5050-6 | U53 |
| 1 | L_I | LED_RGB_5050-6 | U54 |
| 1 | L_RCTRL | LED_RGB_5050-6 | U55 |
| 1 | L_K | LED_RGB_5050-6 | U56 |
| 1 | L_COMMA | LED_RGB_5050-6 | U57 |
| 1 | L_F9 | LED_RGB_5050-6 | U58 |
| 1 | L_9 | LED_RGB_5050-6 | U59 |
| 1 | L_O | LED_RGB_5050-6 | U60 |
| 1 | L_LEFT | LED_RGB_5050-6 | U61 |
| 1 | L_L | LED_RGB_5050-6 | U62 |
| 1 | L_DOT | LED_RGB_5050-6 | U63 |
| 1 | L_0 | LED_RGB_5050-6 | U64 |
| 1 | L_F10 | LED_RGB_5050-6 | U65 |
| 1 | L_P | LED_RGB_5050-6 | U66 |
| 1 | L_DOWN | LED_RGB_5050-6 | U67 |
| 1 | L_SLASH | LED_RGB_5050-6 | U68 |
| 1 | L_SEMI | LED_RGB_5050-6 | U69 |
| 1 | L_MINUS | LED_RGB_5050-6 | U70 |
| 1 | L_F11 | LED_RGB_5050-6 | U71 |
| 1 | L_BRACEL | LED_RGB_5050-6 | U72 |
| 1 | L_RIGHT | LED_RGB_5050-6 | U73 |
| 1 | L_RSHIFT | LED_RGB_5050-6 | U74 |
| 1 | L_APO | LED_RGB_5050-6 | U75 |
| 1 | L_PLUS | LED_RGB_5050-6 | U76 |
| 1 | L_F12 | LED_RGB_5050-6 | U77 |
| 1 | L_BRACER | LED_RGB_5050-6 | U78 |
| 1 | L_UP | LED_RGB_5050-6 | U79 |
| 1 | L_ENTER | LED_RGB_5050-6 | U80 |
| 1 | L_BACK | LED_RGB_5050-6 | U81 |
| 1 | L_PrtSc | LED_RGB_5050-6 | U82 |
| 1 | L_BCKSLSH | LED_RGB_5050-6 | U83 |
| 1 | L_INSERT | LED_RGB_5050-6 | U84 |
| 1 | L_ScrlLck | LED_RGB_5050-6 | U85 |
| 1 | L_DELETE | LED_RGB_5050-6 | U86 |
| 1 | L_HOME | LED_RGB_5050-6 | U87 |
| 1 | L_Pause | LED_RGB_5050-6 | U88 |
| 1 | L_END | LED_RGB_5050-6 | U89 |
| 1 | L_PgUp | LED_RGB_5050-6 | U90 |
| 1 | L_PgDn | LED_RGB_5050-6 | U91 |
| 1 | 25MHZ 9PF | Crystal_SMD_HC49-SD | Y1 |
| 1 | Conn_01x04_Socket | PinHeader_2x02_P1.00mm_Vertical | J2 |
| 1 | Conn_01x02_Socket | PinHeader_1x02_P1.00mm_Vertical | J3 |
| 1 | GT-USB-7004 | GT-USB-7047C | J4 |
| 1 | BOOT0 | SW_SPST_FSMSM | SW62 |
| 1 | NRST | SW_SPST_FSMSM | SW63 |
| 1 | SW_DIP_x01 | SW_SPST_FSMSM | SW64 |
| 87 | BAV16WS | D_SMA | D1, D2, D3, D4, D5, D6, D7, D8 +79 |
| 2 | LED | LED_1210_3225Metric_Pad1.42x2.65mm_HandSolder | D62, D63 |
| 2 | 12pF | C_1206_3216Metric | C1, C2 |
| 1 | 4.7uF | C_1206_3216Metric | C3 |
| 6 | C | C_1206_3216Metric | C4, C5, C6, C7, C13, C14 |
| 2 | 1uF | C_1206_3216Metric | C8, C9 |
| 2 | 10nF | C_1206_3216Metric | C10, C11 |
| 1 | 100nF | C_1206_3216Metric | C12 |
| 2 | 10 | R_1206_3216Metric | R3, R4 |
| 2 | 10K | R_1206_3216Metric | R5, R6 |
| 1 | 4k7 | R_1206_3216Metric | R7 |
| 2 | 1K | R_1206_3216Metric | R8, R9 |
| 2 | 5.1K | R_1206_3216Metric | R10, R11 |
TKLTheSecond design files
The KiCad project lives in the Denrage/customkeyboard repository on GitHub; these links point at the commit this page was built from.
TKLTheSecond: common questions
What microcontroller does the TKLTheSecond use?
The TKLTheSecond is built around the STM32F401RETx, from the STM32 family.
How big is the TKLTheSecond PCB?
The TKLTheSecond measures 360 × 140.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the TKLTheSecond?
210 components, from 111 distinct parts. The full bill of materials is listed on this page.
Where can I download the TKLTheSecond design files?
From the Denrage/customkeyboard repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the TKLTheSecond design in my own project?
The repository has no license, so all rights stay with Denrage. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the TKLTheSecond 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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