4 layers20.3 × 43.2 mm
4 layers48 × 48 mm
BetsyBoardBig
engstad/BetsyBoard1An STM32L4 prototyping board
- Size
- 48 × 48 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 79
- Nets
- 91
- Pads
- 369
- Tracks, vias
- 898, 222
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 22 Dec 2015
- Updated
- 12 Jan 2024
Overview
BetsyBoardBig is an open-source printed circuit board by engstad, from the engstad/BetsyBoard repository on GitHub. It is a 4-layer board of 48 × 48 mm with 79 parts on 91 nets, routed with 898 tracks and 222 vias.
It is built around the MCP73871EV, 74LVC1G08Z and 74LVC1G3157, with the 74LVC3G14DC, TLV75733PDBVR-MS and USBLC6-2SC6 among its other parts. Its parts include 25 capacitors, 15 resistors, 11 connectors, 8 ICs and 3 diodes. It belongs with the STM32 boards of this library.
Main components
6MCP73871EV
-ModulesMicrochip Technology
74LVC1G08Z
SOT-553-5-40℃~+125℃ 1 1.65V~5.5V 1.7V、2V 2 2.4V、3.8V 32mA 32mA 4ns@5V,50pF 550mV、800mV 700mV、800mV 74LVC Series AND Gate SOT-553-5 Logic Gates ROHSDiodes IncorporatedLogic Gates74LVC1G3157
UncategorisedDiodes Incorporated
74LVC3G14DC
VSSOP-8-0.5mm-40℃~+125℃ 1.65V~5.5V 2.4ns@5.5V,50pF 24mA 24mA 3 4uA 74LVC Schmitt trigger VSSOP-8-0.5mm Inverters ROHSNexperiaInverters
TLV75733PDBVR-MS
SOT-23-5SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIUncategorised
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
README
README.mdExperimental STM32L486 breakout board
Parts
79| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C3, C8, C9, C10, C16, C18, C19, C20, C21, C22, C23, C24, C25 |
| 4 | 10K | Resistor_SMD:R_0603_1608Metric | R5, R7, R10, R15 |
| 4 | Mounting | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 4 | TestPoint_Probe | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1, TP2, TP3, TP4 |
| 3 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C4, C7, C17 |
| 2 | 12pF | Capacitor_SMD:C_0603_1608Metric | C14, C15 |
| 2 | 16pF | Capacitor_SMD:C_0603_1608Metric | C12, C13 |
| 2 | 1K | Resistor_SMD:R_0603_1608Metric | R8, R11 |
| 2 | 1uF | Capacitor_SMD:C_0805_2012Metric | C5, C6 |
| 2 | 330 | Resistor_SMD:R_0603_1608Metric | R12, R14 |
| 2 | 5K1 | Resistor_SMD:R_0603_1608Metric | R3, R4 |
| 1 | 1.0uF | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 100K | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 110K | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 180 | Resistor_SMD:R_0603_1608Metric | R13 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 220Ω@100MHz | Inductor_SMD:L_0805_2012Metric | FB1 |
| 1 | 330K | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | 74LVC1G08 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | 74LVC1G3157 | Package_TO_SOT_SMD:SOT-23-6 | U7 |
| 1 | 74LVC3G14 | Package_SO:SSOP-8_2.95x2.8mm_P0.65mm | U5 |
| 1 | ANALOG | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Horizontal | J6 |
| 1 | BATT | engstad:pin-socket-2 | P2 |
| 1 | BATT | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | P1 |
| 1 | BATT | Engstad:Battery_Keystone_2894 | B1 |
| 1 | BLUE | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | CLOCKS | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J2 |
| 1 | CORTEX-JTAG | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | P3 |
| 1 | Crystal | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | GRN | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | I2C | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J4 |
| 1 | IS25LP06D-xB | Package_SO:SOIC-8_5.275x5.275mm_P1.27mm | U8 |
| 1 | JUMPER | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | SW1 |
| 1 | MCP73871 | Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm | U3 |
| 1 | Micro_SD_Card | Engstad:Molex_PS_105162_001 | J8 |
| 1 | Net-Tie_2 | NetTie:NetTie-2_SMD_Pad0.5mm | NT1 |
| 1 | Polyfuse | Fuse:Fuse_0805_2012Metric | F1 |
| 1 | RED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | SPI | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | STM32L486Rx-LQFP64 | Package_QFP:LQFP-64_10x10mm_P0.5mm | U6 |
| 1 | SW_PUSH_NO_ALT | Engstad:TACTILE_SWITCH-TE-FSM4JSMAATR | SW3 |
| 1 | TE-FSM4J | Engstad:TACTILE_SWITCH-TE-FSM4JSMAATR | SW2 |
| 1 | TLV75733PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | USART1 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Horizontal | J7 |
| 1 | USART3 | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Horizontal | J5 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_GCT_USB4085 | J1 |
| 1 | XTAL | engstad:cstce-v-c | X1 |
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Questions
How big is the BetsyBoardBig PCB?
It measures 48 × 48 mm and has 4 copper layers, 1.6 mm thick.
What parts does the BetsyBoardBig use?
79 parts, built around the MCP73871EV, 74LVC1G08Z, 74LVC1G3157 and 74LVC3G14DC. 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 BetsyBoardBig KiCad files?
From the engstad/BetsyBoard repository on GitHub, at the commit this page was made from: the board is BetsyBoardBig.kicad_pcb and its schematic BetsyBoard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BetsyBoardBig design in my own project?
Its repository states no licence, so its author keeps all rights: ask engstad before reusing the design.