HardLabs

OPS

Jana-Marie·OPS

OPS PCB layout, top view — open source STM32 board by Jana-Marie

About the OPS PCB

OPS is an open source STM32 PCB design by Jana-Marie, published on GitHub. It is a 2-layer board measuring 49 × 34 mm, with 98 components from 38 distinct parts.

Its main chip is the STM32F072CBTx, from the STM32 family. Other key parts include the STUSB4500, AP2204R-3.3, MP8859, USBLC6-4 and SI8540. By type, the board carries 37 capacitors, 35 resistors, 8 ICs, 7 connectors, 7 diodes and 2 transistors.

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

From the project

OPS - The Otter Power Supply

OPS is a matchbox sized 65W CC/CV lab power supply. It is controlled by SCPI and powered by USB-PD.

Please Note that this project is not yet fully tested.

OPS, from the project README
From the project README

Main components on the OPS

STUSB4500AP2204R-3.3STM32F072CBTxMP8859USBLC6-4SI8540MCP9700AT-ETTOPA340NA

OPS bill of materials (BOM)

98 components, 38 distinct parts.

QtyPartRefs
1
STUSB4500
U1
1
AP2204R-3.3
U2
1
STM32F072CBTx
U3
1
MP8859
U4
1
USBLC6-4
U5
1
SI8540
U6
1
MCP9700AT-ETT
U7
1
OPA340NA
U8
1
SS8050
Q1
1
AO3400
Q2
1
USB
J1
1
PWR
J2
2
Banana
J3, J4
1
CON_PWR
J5
1
CON_DATA
J6
1
TC2030
P1
1
DFU
SW1
3
D_Small
D1, D6, D7
1
SS34
D2
1
12-22_R6GHC-A30_2C
D3
Show 18 more
QtyPartRefs
1
PWR
D4
1
ACT
D5
1
IHLE-2525CD
L1
5
1u
C1, C2, C5, C6, C12
18
100n
C3, C4, C7, C11, C19, C21, C22, C23 +10
7
22u
C8, C9, C13, C17, C35, C36, C38
4
100n
C10, C14, C15, C16
1
22n
C18
1
22u
C20
1
DNP
C28
22
5k1
R1, R2, R3, R4, R5, R6, R7, R8 +14
3
33k
R11, R13, R22
1
21.5k
R15
2
33
R18, R21
4
2k37
R19, R31, R33, R34
1
33
R20
1
100k
R30
1
750k
R32

OPS design files

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

OPS: common questions

What microcontroller does the OPS use?

The OPS is built around the STM32F072CBTx, from the STM32 family.

How big is the OPS PCB?

The OPS measures 49 × 34 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the OPS?

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

Where can I download the OPS design files?

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

Can I use the OPS design in my own project?

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

Can I test firmware for the OPS 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.

Similar boards