HardLabs

Pillbus

johannesloetzsch·pillbus·hw/stm32-pillbus/pillbus.kicad_pcb

Pillbus PCB layout, top view — open source STM32 board by johannesloetzsch

About the Pillbus PCB

Pillbus is an open source STM32 PCB design by johannesloetzsch, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 100 × 100 mm, with 247 components from 30 distinct parts.

Its main chip is the STM32F103C8T6, from the STM32 family. Other key parts include the 3.3V Voltage Regulator 200mA. By type, the board carries 42 LEDs, 15 capacitors, 10 ICs, 10 switches, 5 crystals and 5 inductors.

It belongs with the power & battery designs in this gallery.

From the project

Simple and configurable bus controllers based on STM32.

Simple and configurable bus controllers based on STM32.

Different from OtterPill, a newer MCU is used:

ARM Cortex-M3 2V~3.6V Operating Voltage Range 50mA max current consumption (Run mode, 72MHz, all peripherals enabled) 64KB Program FLASH Storage 20KB RAM max 72MHz, Internal Oscillator 35/37 GPIO Ports 2 SPI, 2 I²C, 3 USART, 1 USB 2.0 full-speed, 1 CAN 12bit ADC DMA

Main components on the Pillbus

3.3V Voltage Regulator 200mASTM32F103C8T6

Pillbus bill of materials (BOM)

247 components, 30 distinct parts.

QtyPartRefs
5
3.3V Voltage Regulator 200mA
U1, U3, U5, U7, U9
5
STM32F103C8T6
U2, U4, U6, U8, U10
5
Crystal 12MHz X322512MSB4SI
X1, X2, X3, X4, X5
40
~
3.3V1, 3.3V2, 3.3V3, 3.3V4, 3.3V5, DI1, DI2, DI3 +32
5
~
B1, B2, B3, B4, B5
5
4.7uF
CVcc1, CVcc2, CVcc3, CVcc4, CVcc5
5
1μF
CVssA1, CVssA2, CVssA3, CVssA4, CVssA5
5
10nF
CVssAn1, CVssAn2, CVssAn3, CVssAn4, CVssAn5
10
30pF
Cosc1, Cosc2, Cosc3, Cosc4, Cosc5, Cosc6, Cosc7, Cosc8 +2
5
100nF
Crst1, Crst2, Crst3, Crst4, Crst5
5
~
IDE_STM_A1, IDE_STM_A2, IDE_STM_A3, IDE_STM_A4, IDE_STM_A5
5
~
IDE_STM_B1, IDE_STM_B2, IDE_STM_B3, IDE_STM_B4, IDE_STM_B5
5
~
IDE_STM_C1, IDE_STM_C2, IDE_STM_C3, IDE_STM_C4, IDE_STM_C5
5
~
IDE_STM_D1, IDE_STM_D2, IDE_STM_D3, IDE_STM_D4, IDE_STM_D5
5
VBAT
JVbat1, JVbat2, JVbat3, JVbat4, JVbat5
5
15-30nH
LVssA1, LVssA2, LVssA3, LVssA4, LVssA5
10
51kΩ
RVbusI1, RVbusI2, RVbusI3, RVbusI4, RVbusI5, RpuBoot1, RpuBoot2, RpuBoot3 +2
5
100kΩ
RVbusO1, RVbusO2, RVbusO3, RVbusO4, RVbusO5
5
1k-1.5k
Rled1, Rled2, Rled3, Rled4, Rled5
10
10kΩ
Rpd1, Rpd2, Rpd3, Rpd4, Rpd5, Rpu1, Rpu2, Rpu3 +2
Show 10 more
QtyPartRefs
5
1.5kΩ
RpuUSB1, RpuUSB2, RpuUSB3, RpuUSB4, RpuUSB5
10
2.2kΩ
Rscl1, Rscl2, Rscl3, Rscl4, Rscl5, Rsda1, Rsda2, Rsda3 +2
10
Tactile Switch
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8 +2
5
USB_C
USB1, USB2, USB3, USB4, USB5
5
VSSA
VSSA1, VSSA2, VSSA3, VSSA4, VSSA5
32
WS2812B
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +24
5
Green
LED33, LED34, LED35, LED36, LED37
5
LED WS2812B-S XL-5050RGBC
RGB1, RGB2, RGB3, RGB4, RGB5
5
100Ω@100MHz
L1, L2, L3, L4, L5
15
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +7

Pillbus design files

The KiCad project lives in the johannesloetzsch/pillbus repository on GitHub; these links point at the commit this page was built from.

Pillbus: common questions

What microcontroller does the Pillbus use?

The Pillbus is built around the STM32F103C8T6, from the STM32 family.

How big is the Pillbus PCB?

The Pillbus measures 100 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Pillbus?

247 components, from 30 distinct parts. The full bill of materials is listed on this page.

Where can I download the Pillbus design files?

From the johannesloetzsch/pillbus repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Pillbus design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which johannesloetzsch chose for the repository.

Can I test firmware for the Pillbus 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.

More boards in pillbus

Similar boards