Node base
About the Node base PCB
Node base is an open source STM32 PCB design by LanternD, published on GitHub under the Apache-2.0 license. It is a 2-layer board measuring 78 × 40 mm, with 73 components from 45 distinct parts.
Its main chip is the STM32F103RETx, from the STM32 family. Other key parts include the SMF05C, CAT24C128, LM3671MF-3.3, INA226 and Si7021-A20. By type, the board carries 19 capacitors, 18 resistors, 12 connectors, 8 ICs, 4 diodes and 3 switches.
It belongs with the iot & wireless, sensors and power & battery designs in this gallery.
From the project
Hardware and software design for NB-Scope.
Node mainboard is responsible for hosting the module shieldboard, sensing the environment, collecting debug log and current traces, and so on.
- STM32F103 as the main processor - LM3671-3.3 as DC-DC converter - CM1624 as micro SD card protector - CAT24C128 as non-volatile memory - TXB0108 as logic level converter (3.3v 1.8v) - Si7021 as temperature and relative humidity sensor - INA226 as current sensor
Main components on the Node base
Node base bill of materials (BOM)
73 components, 45 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SMF05C | SOT-363_SC-70-6 | U1 |
| 1 | STM32F103RETx | LQFP-64_10x10mm_P0.5mm | U2 |
| 1 | CAT24C128 | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | LM3671MF-3.3 | TSOT-23-5 | U4 |
| 1 | INA226 | VSSOP-10_3x3mm_P0.5mm | U5 |
| 1 | Si7021-A20 | DFN-6-1EP_3x3mm_P1mm_EP1.5x2.4mm | U6 |
| 1 | TXB0108DQSR | USON-20_2x4mm_P0.4mm | U7 |
| 1 | CM1624 | UDFN-16_3.3x1.35mm_0.4Pitch | U8 |
| 2 | DTC143Z | SOT-723 | Q1, Q2 |
| 1 | 8MHz | Crystal_SMD_5032-2Pin_5.0x3.2mm | Y1 |
| 1 | 32.768kHz | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | SIM_Card | Nano Sim Socket 1.1H, 6P | J1 |
| 1 | 3.3V ISO | PinHeader_2x02_P1.27mm_Vertical | J2 |
| 1 | Micro_SD_Card | TF_Card_Socket | J3 |
| 1 | Display_Connector | PinSocket_1x04_P1.27mm_Vertical | J4 |
| 2 | USB_B_Micro | USB_Micro-B_Molex-105017-0001 | J5, J10 |
| 1 | SWD_Conn | PinSocket_1x04_P1.27mm_Vertical | J6 |
| 1 | GPIO_Out | PinSocket_1x06_P1.27mm_Vertical | J7 |
| 1 | PWR_SELECT | PinHeader_1x03_P2.54mm_Vertical | J8 |
| 1 | AUX_UART | PinSocket_1x03_P1.27mm_Vertical | J9 |
Show 25 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Left_Conn | PinHeader_1x22_P1.27mm_Vertical | J12 |
| 1 | Right_Conn | PinHeader_1x22_P1.27mm_Vertical | J13 |
| 1 | Battery_Holder_2x | 18650_Battery_Holder_2x | H1 |
| 1 | SW_RST | SMD_Switch | SW1 |
| 1 | SW_1 | SMD_Switch | SW2 |
| 1 | SW_2 | SMD_Switch | SW3 |
| 1 | M_ADC | test_pad | T1 |
| 1 | 3.3VPU | test_pad | TP1 |
| 1 | 3.3V_OUT | test_pad | TP2 |
| 4 | LED | LED_0805_2012Metric | D1, D2, D3, D4 |
| 1 | 2.2uH | L_Sumida_CDRH2D14_3.2x3.2x1.55mm | L1 |
| 5 | 10nF | C_0603_1608Metric | C1, C7, C14, C15, C17 |
| 4 | 10pF | C_0603_1608Metric | C2, C3, C4, C5 |
| 1 | 4.7uF | C_0805_2012Metric | C8 |
| 1 | 10uF | C_0805_2012Metric | C9 |
| 8 | 100nF | C_0603_1608Metric | C10, C11, C12, C13, C16, C18, C19, C20 |
| 1 | 220k | R_0603_1608Metric | R1 |
| 1 | 470k | R_0603_1608Metric | R2 |
| 4 | 4.7k | R_0603_1608Metric | R3, R11, R13, R16 |
| 3 | 10k | R_0603_1608Metric | R4, R7, R8 |
| 2 | 0 | R_0603_1608Metric | R5, R14 |
| 4 | 22 | R_0603_1608Metric | R9, R10, R20, R21 |
| 1 | R100 | R_1206_3216Metric | R12 |
| 1 | 1.5k | R_0603_1608Metric | R15 |
| 1 | 2.2k | R_Array_Convex_4x0603 | RN4 |
Node base design files
The KiCad project lives in the LanternD/NB-Scope repository on GitHub; these links point at the commit this page was built from.
Node base: common questions
What microcontroller does the Node base use?
The Node base is built around the STM32F103RETx, from the STM32 family.
How big is the Node base PCB?
The Node base measures 78 × 40 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Node base?
73 components, from 45 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 Node base design files?
From the LanternD/NB-Scope 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 Node base design in my own project?
Yes, under the terms of its Apache-2.0 license, which LanternD chose for the repository.
Can I test firmware for the Node base 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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