Cdm324 exp
About the Cdm324 exp PCB
Cdm324 exp is an open source PCB design by Valar-Systems, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 60 × 17.6 mm, with 29 components from 13 distinct parts.
Other key parts include the C3035748. By type, the board carries 13 resistors, 6 connectors, 5 capacitors, 3 switches, 1 IC 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 exp
Cdm324 exp bill of materials (BOM)
29 components, 13 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | C3035748 CH340X | MSOP-10_3x3mm_P0.5mm | U1 |
| 2 | C2685133 Conn_02x04_Odd_Even | PinSocket_2x04_P2.54mm_Vertical | J1, J2 |
| 1 | C2988369 USB_C_Receptacle_USB2.0 | USB_C_Receptacle_G-Switch_GT-USB-7010ASV | J3 |
| 1 | C381082 Micro_SD_Card_Det1 | XKTF-015-N | J5 |
| 1 | Conn_01x04_Socket | PinHeader_1x04_P2.54mm_Vertical | J6 |
| 1 | C431535 AudioJack4 | Jack_3.5mm_PJ320D_Horizontal | J7 |
| 2 | C255812 SW_Push | SW_Push_1P1T_NO_6x6mm_H9.5mm | SW1, SW2 |
| 1 | C126888 SW_DIP_x01 | SW_DIP_SPSTx01_Slide_9.78x4.72mm_W7.62mm_P2.54mm | SW3 |
| 1 | C14709 FerriteBead | L_0603_1608Metric | FB1 |
| 5 | C1592 1uF | C_0603_1608Metric | C1, C2, C3, C4, C5 |
| 5 | C22548 1k | R_0603_1608Metric | R1, R4, R5, R6, R7 |
| 2 | C105580 5.1k | R_0603_1608Metric | R2, R3 |
| 6 | C114624 49k9 | R_0603_1608Metric | R8, R9, R10, R11, R12, R13 |
Cdm324 exp 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 exp: common questions
How big is the Cdm324 exp PCB?
The Cdm324 exp measures 60 × 17.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Cdm324 exp?
29 components, from 13 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 exp 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 exp design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which Valar-Systems chose for the repository.
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