HardLabs

Cdm324 v2

Valar-Systems·MiniSpeedCam·version/r1.1/hardware/pcb/reference/cdm324_v2/cdm324_v2.kicad_pcb

Cdm324 v2 PCB layout, top view — open source STM32 board by Valar-Systems

About the Cdm324 v2 PCB

Cdm324 v2 is an open source STM32 PCB design by Valar-Systems, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 32 × 32.5 mm, with 37 components from 17 distinct parts.

Its main chip is the STM32F301K8U6, from the STM32 family. Other key parts include the LMP7731MF/NOPB, MAX9814ETD+T, NCP163ASN330T1G and PCA8561AHN/AY. By type, the board carries 17 capacitors, 10 resistors, 6 ICs, 3 connectors and 1 inductor.

It belongs with the usb & debug tools designs in this gallery.

From the project

MiniSpeedCam

Hardware version R1.1 has a problem with the ESP32 USB circuit.

When the ESP32 enters sleep mode, the USB becomes disconnected and the Serial Console will not function after it wakes up. Arduino will need to be restarted before you can flash the firmware again.

More info here: https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-guides/usb-serial-jtag-console.html#sleep-mode-considerations

Main components on the Cdm324 v2

LMP7731MF/NOPBMAX9814ETD+TNCP163ASN330T1GSTM32F301K8U6PCA8561AHN/AY

Cdm324 v2 bill of materials (BOM)

37 components, 17 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LMP7731MF/NOPB
LMP7731
Texas Instruments
U1
1
~
U2
1
MAX9814ETD+T
MAX9814
Analog Devices Inc./Maxim Integrated
U3
1
NCP163ASN330T1G
onsemi
U4
1
STM32F301K8U6
STM32F301K8Ux
STMicroelectronics
U5
1
PCA8561AHN/AY
~
NXP USA Inc.
U6
1
PPPC031LFBN-RC
Conn_01x03_Female
Sullins Connector Solutions
J2
2
PPPC042LFBN-RC
Conn_02x04_Odd_Even
Sullins Connector Solutions
J4, J5
1
HZ0805D102R-10
Ferrite_Bead
Laird-Signal Integrity Products
FB1
6
CL21A226MOCLRNC
22uF
Samsung Electro-Mechanics
C1, C3, C5, C10, C11, C13
9
C1005X5R1E474K050BB
470nF
TDK Corporation
C2, C6, C7, C8, C12, C14, C15, C16 +1
1
CC0603JRNPO9BN270
200p
YAGEO
C4
1
GRM188R71A225KE15D
2.2uF
Murata Electronics
C9
5
RC0603FR-074K7L
4k7
YAGEO
R1, R4, R8, R9, R10
2
RC0402JR-0775RL
75
YAGEO
R2, R7
1
RC0603FR-07620KL
130k
YAGEO
R3
2
ERJ-3EKF1303V
130k
Panasonic Electronic Components
R5, R6

Cdm324 v2 design files

The KiCad project lives in the Valar-Systems/MiniSpeedCam repository on GitHub; these links point at the commit this page was built from.

Cdm324 v2: common questions

What microcontroller does the Cdm324 v2 use?

The Cdm324 v2 is built around the STM32F301K8U6, from the STM32 family.

How big is the Cdm324 v2 PCB?

The Cdm324 v2 measures 32 × 32.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Cdm324 v2?

37 components, from 17 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 Cdm324 v2 design files?

From the Valar-Systems/MiniSpeedCam 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 Cdm324 v2 design in my own project?

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

Can I test firmware for the Cdm324 v2 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 MiniSpeedCam

Similar boards