L432KC
About the L432KC PCB
L432KC is an open source PCB design by grumat, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 81.3 × 55.9 mm, with 49 components from 39 distinct parts.
Other key parts include the AD8531ARTZ, 74LVC2T45DC, 74AVCH2T45DC, 74LVC125APW and SRV05-4. By type, the board carries 14 resistors, 13 capacitors, 10 connectors, 8 ICs, 3 diodes and 1 fuse.
It belongs with the usb & debug tools designs in this gallery.
From the project
Glossy MSP430 - Embedded GDB Debugger for MSP430
Since the chip crisis of 2020 an alternative was considered to replace the STM32F103 series since official stores have no stock and chinese sources are unreliable, providing mostly clones or counterfeits. Still accessible are newer releases of STM32 like the STM32L432KC or STM32G431KB, through the Nucleo-32 development boards.
This is a still cheap and powerful solution and has the advantage that newer chips offers more efficient design than the older Cortex M3:
Main components on the L432KC
L432KC bill of materials (BOM)
49 components, 39 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AD8531ARTZ | SOT-23-5_HandSoldering | U1 |
| 1 | AD8531ARTZ SRV05-4 | SOT-23-6_Handsoldering | U2 |
| 1 | 74LVC2T45DC NUCLEO-L432KC | MODULE_NUCLEO-L432KC | U3 |
| 1 | 74AVCH2T45DC | VSSOP-8_2.3x2mm_P0.5mm | U4 |
| 1 | 74LVC125APW | TSSOP-14_4.4x5mm_P0.65mm | U5 |
| 1 | SRV05-4 74LVC125APW | TSSOP-14_4.4x5mm_P0.65mm | U6 |
| 1 | SRV05-4 | SOT-23-6 | U7 |
| 1 | SRV05-4 | SOT-23-6 | U8 |
| 1 | USB_B_Micro | USB_Micro-B_Molex-105017-0001-handsolder | J1 |
| 1 | JTAG | IDC-Header_2x07_P2.54mm_Vertical | J2 |
| 1 | L4_G4 | PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | VCP | PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | 3v3 | PinHeader_1x03_P2.54mm_Vertical | J5 |
| 1 | GND | PinHeader_1x03_P2.54mm_Vertical | J6 |
| 1 | Conn_01x07 | PinHeader_1x07_P2.54mm_Vertical | J7 |
| 1 | Conn_01x07_Male | PinHeader_1x07_P2.54mm_Vertical | J8 |
| 1 | TVCC | PinHeader_1x02_P2.54mm_Vertical | J9 |
| 1 | LogicAna | PinHeader_1x07_P2.54mm_Vertical | J10 |
| 1 | 0603L010YR | Fuse_0603_1608Metric_Pad1.05x0.95mm_HandSolder | F1 |
| 1 | PMEG4010BEA,115 | D_SOD-323 | D1 |
Show 19 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RED | LED_D3.0mm | D2 |
| 1 | GREEN | LED_D3.0mm | D3 |
| 6 | 100NF 100nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C6, C9, C10, C11, C12 |
| 1 | 10UF 22p | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2 |
| 2 | 10UF 100nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C8 |
| 1 | 1NF 10uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4 |
| 1 | 100NF 22p | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5 |
| 1 | 10UF 10uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7 |
| 1 | 100nF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C13 |
| 1 | 47K 33K | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
| 1 | 47K 100K | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 1 | 4K7 10K | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
| 1 | 4K7 22 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4 |
| 1 | 150 4K7 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5 |
| 1 | 10K 4K7 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R6 |
| 1 | 22 | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7 |
| 2 | 1K | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8, R9 |
| 3 | 10K 47k | R_Array_Convex_4x0402 | RN1, RN2, RN4 |
| 2 | 100 | R_Array_Convex_4x0402 | RN3, RN5 |
L432KC design files
The KiCad project lives in the grumat/glossy-msp430 repository on GitHub; these links point at the commit this page was built from.
L432KC: common questions
How big is the L432KC PCB?
The L432KC measures 81.3 × 55.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the L432KC?
49 components, from 39 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the L432KC design files?
From the grumat/glossy-msp430 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the L432KC design in my own project?
Yes, under the terms of its GPL-2.0 license, which grumat chose for the repository.
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