Cdm324 exp
About the Cdm324 exp PCB
Cdm324 exp is an open source PCB design by limpkin, published on GitHub under the MIT 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.
From the project
Repository for the CDM324 backpack v2
In the unlikely case you want to reflash your device with another firmware, you may either use the GUI present in this repository or the stm32loader python module directly :
If you don't have the companion expansion board, you may use STM32 Flash loader after performing the following toggling sequence: - tie nRESET to GND - bring BOOT0 to 3V3_OUT - release nRESET - releae BOOT0
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 limpkin/cdm324_fft 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 limpkin/cdm324_fft 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 MIT license, which limpkin chose for the repository.
