Lopill

spbnick·lopill·lopill.kicad/lopill.kicad_pcb

Lopill PCB layout, top view — open source STM32 board by spbnick

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About the Lopill PCB

Lopill is an open source STM32 PCB design by spbnick, published on GitHub. It is a 2-layer board measuring 23 × 59.5 mm, with 32 components from 24 distinct parts.

Its main chip is the STM32L052C8Tx, from the STM32 family. Other key parts include the XC6206PxxxMR. By type, the board carries 11 capacitors, 7 jumpers, 4 connectors, 3 resistors, 2 ICs and 2 crystals.

It belongs with the dev boards & breakouts designs in this gallery.

From the project

STM32L052 development board

LoPill is a minimal development board for STM32L052C8T6 microcontroller, in the form-factor of the popular "Blue Pill".

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Main components on the Lopill

XC6206PxxxMR STM32L052C8Tx

Lopill bill of materials (BOM)

32 components, 24 distinct parts.

Qty	Part	Footprint	Refs
1	XC6206PxxxMR	SOT-23	U1
1	STM32L052C8Tx	LQFP-48_7x7mm_P0.5mm	U2
1	8MHz	Crystal_SMD_5032-2Pin_5.0x3.2mm_YXC	Y1
1	32.768KHz	Crystal_SMD_3215-2Pin_3.2x1.5mm	Y2
1	Pins Left	PinHeader_1x22_P2.54mm_Vertical	J1
1	SWD	PinHeader_1x04_P2.54mm_Vertical	J2
1	USB_B_Micro	USB_Micro-B_HRO_U-D-M5DD-W-1_Vertical	J3
1	Pins Right	PinHeader_1x22_P2.54mm_Vertical	J4
1	5V	SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm	JP1
1	LED	SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm	JP2
1	3V3	SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm	JP3
1	BOOT0	PinHeader_1x03_P2.54mm_Vertical	JP4
1	VDD	SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm	JP5
1	VDDA	SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm	JP6
1	GNDA	SolderJumper-2_P1.3mm_Bridged2Bar_RoundedPad1.0x1.5mm	JP7
1	Reset	SW_Push_1P1T_NO_5.1x5.1mm_H2.5mm	SW1
1	BLU	LED_0603_1608Metric	D1
1	GRN	LED_0603_1608Metric	D2
2	1uF	C_0402_1005Metric	C1, C2
5	100nF	C_0402_1005Metric	C3, C8, C9, C10, C11

Show 4 more

Qty	Part	Footprint	Refs
2	30pF	C_0402_1005Metric	C4, C5
2	15pF	C_0402_1005Metric	C6, C7
2	510R	R_0402_1005Metric	R1, R2
1	10K	R_0402_1005Metric	R3

Lopill design files

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

Layoutlopill.kicad/lopill.kicad_pcb
Schematiclopill.kicad/lopill.kicad_sch

Lopill: common questions

What microcontroller does the Lopill use?

The Lopill is built around the STM32L052C8Tx, from the STM32 family.

How big is the Lopill PCB?

The Lopill measures 23 × 59.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Lopill?

32 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the Lopill design files?

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

Can I use the Lopill design in my own project?

The repository has no license, so all rights stay with spbnick. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Lopill 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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