Keypad
About the Keypad PCB
Keypad is an open source STM32 PCB design by Fabian0520, published on GitHub under the Custom license license. It is a 2-layer board measuring 76.3 × 115.3 mm, with 74 components from 29 distinct parts.
Its main chip is the STM32F303C6Tx, from the STM32 family. Other key parts include the MCP1804x-3302xOT. By type, the board carries 25 diodes, 19 relays, 12 capacitors, 8 resistors, 2 ICs and 2 connectors.
Main components on the Keypad
Keypad bill of materials (BOM)
74 components, 29 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32F303C6Tx | LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | MCP1804x-3302xOT | SOT-23-5_HandSoldering | U2 |
| 1 | BC847 | SOT-23 | Q1 |
| 1 | A7 8MHz | Crystal_SMD_5032-4Pin_5.0x3.2mm | Y1 |
| 1 | Conn_01x04_Female | PinHeader_1x04_P2.00mm_Vertical | J1 |
| 1 | USB_C_Receptacle_USB2.0 | USB C HRQ low cost | J3 |
| 1 | Batch | nostromo_batch | H1 |
| 1 | Nostromo | nostromo | H2 |
| 1 | Science | science_badge | H3 |
| 18 | KEYSW | SW_Cherry_MX1A_1.00u_Plate | K1_1, K1_2, K1_3, K1_4, K2_1, K2_2, K2_3, K2_4 +10 |
| 1 | KEYSW | SW_Cherry_MX1A_2.00u_PCB | K4_4 |
| 1 | SW_Push | SW_SPST_B3U-1000P | SW1 |
| 2 | POWER_LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1, D25 |
| 8 | D_x2_KCom_AAK | SOT23-3_HSOL | D2, D3, D5, D6, D8, D9, D11, D12 |
| 3 | D | D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4, D7, D10 |
| 10 | SK6805 | LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D13, D14, D15, D16, D17, D18, D19, D20 +2 |
| 2 | 1N4148 | D_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D23, D24 |
| 3 | 100n | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3 |
| 1 | 1u | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C4 |
| 1 | 4.7u | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C5 |
Show 9 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 22p | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C6, C7 |
| 3 | 4.7n | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C8, C11, C12 |
| 2 | 10u | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C9, C10 |
| 1 | 1.5k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1 |
| 1 | 100k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2 |
| 2 | 330 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3, R5 |
| 1 | 1M | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R6 |
| 1 | 5.1k | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R7 |
| 2 | 22 | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R10, R11 |
Keypad design files
The KiCad project lives in the Fabian0520/keypad repository on GitHub; these links point at the commit this page was built from.
- Layoutkeypad.kicad_pcb
Keypad: common questions
What microcontroller does the Keypad use?
The Keypad is built around the STM32F303C6Tx, from the STM32 family.
How big is the Keypad PCB?
The Keypad measures 76.3 × 115.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Keypad?
74 components, from 29 distinct parts. The full bill of materials is listed on this page.
Where can I download the Keypad design files?
From the Fabian0520/keypad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Keypad 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 Keypad 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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