HardLabs

EF-S-Adapter

Jana-Marie·EF-S-Adapter·hardware/v1.1/lensmount-v1.1.kicad_pcb

EF-S-Adapter PCB layout, top view — open source STM32 board by Jana-Marie
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About the EF-S-Adapter PCB

EF-S-Adapter is an open source STM32 PCB design by Jana-Marie, published on GitHub under the MIT license. It is a 2-layer board measuring 65 × 65 mm, with 38 components from 20 distinct parts.

Its main chip is the STM32F042F6Px, from the STM32 family. Other key parts include the XC6206PxxxMR and USBLC6-4. By type, the board carries 13 resistors, 10 connectors, 7 capacitors, 5 transistors and 3 ICs.

From the project

Hard- and Firmware to control different EF and EF-S lenses

Hard- and Firmware to control EF/EF-S lenses. The protocol used has grown since the first generation of EF(-S) lenses hence is a bit extensive with different layers of compatibility. On the physical layer a SPI like interface is used with I2S alike clock-stretching.

Please use at your own risk, the hard- and firmware are experimental and can damage your lens!

EF-S-Adapter, from the project README
From the project README

Main components on the EF-S-Adapter

STM32F042F6PxXC6206PxxxMRUSBLC6-4

EF-S-Adapter bill of materials (BOM)

38 components, 20 distinct parts.

QtyPartRefs
1
STM32F042F6Px
U1
1
XC6206PxxxMR
U2
1
USBLC6-4
U3
3
2N7002
Q1, Q2, Q3
2
AO3401A
Q4, Q5
1
VBAT
J1
1
DETECT
J2
1
AGND
J3
1
VDD
J4
1
DOUT
J5
1
DIN
J6
1
DCLK
J7
1
DGND
J8
1
USB
J9
1
Picoblade DNP
J10
3
100n
C1, C2, C5
4
1u
C3, C4, C6, C7
10
5k1
R1, R2, R3, R4, R5, R6, R7, R8 +2
1
0
R9
2
100k
R10, R12

EF-S-Adapter design files

The KiCad project lives in the Jana-Marie/EF-S-Adapter repository on GitHub; these links point at the commit this page was built from.

EF-S-Adapter: common questions

What microcontroller does the EF-S-Adapter use?

The EF-S-Adapter is built around the STM32F042F6Px, from the STM32 family.

How big is the EF-S-Adapter PCB?

The EF-S-Adapter measures 65 × 65 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the EF-S-Adapter?

38 components, from 20 distinct parts. The full bill of materials is listed on this page.

Where can I download the EF-S-Adapter design files?

From the Jana-Marie/EF-S-Adapter repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the EF-S-Adapter design in my own project?

Yes, under the terms of its MIT license, which Jana-Marie chose for the repository.

Can I test firmware for the EF-S-Adapter 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.

Earlier revisions in the repo: lensmount-v1

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