12V to 5V automotive step-down module LMR33630

4.mp4

5.mp4

BOM_Small Round Screen Amplifier Board-V1.0.csv

BOM_Small Round Screen Amplifier Board-V1.1.csv

BOM_Small Round Screen Amplifier Board-V1.2.csv

bootloader.bin

firmware.bin

partitions.bin

Schematic_Eye of God-Amplifier Board-V1.2_2024-01-11.pdf

BOM_Small Round Screen Amplifier Board - V1.2 Buying Guide and Price Reference Table.xlsx

esp32c3_test1.zip

Schematic_Eye of God-Amplifier Board-V1.3_2024-03-21.pdf

92163

WWAN2USB_FM350

DIY 5G CPE Adapter Board / 5G Module to USB Adapter Board

Function Description:
DIY 5G CPE Adapter Board/5G Module to USB Adapter Board.
Tested download speed: 300Mbps+.
Open Source License:
CC BY-NC-SA 4.0.
Notes:

The Type-C interface only supports USB 3.0 on one side. Different LED colors indicate the orientation: pinkish-purple for USB 3.0, yellow for USB 2.0
. The antenna spacing is too small; please select an antenna with a diameter <12mm or use an antenna extension cable (antenna panel hole spacing adjusted to 14mm).
The heat dissipation space is approximately 10.6mm high, 48mm wide, and 60mm long. The heatsink and fan must

be smaller than these dimensions. Issues:
I've been busy lately and won't be making further modifications for now. Welcome to continue sharing a more perfect version.

The inductor makes a whistling sound under high load; this may be due to an unreasonable inductor/power supply design. The order was placed hastily;
a MUX chip needs to be added.
The LED placement is slightly inward, supporting reversible Type-C interface , and requires

further adjustment.
This project has been verified, but the following modifications were made after verification:

antenna spacing was increased, the position of some panel interfaces was slightly adjusted
, the outer contour of the adapter board was adjusted and copper plating
was reapplied, and the soldering stud pad connection method was changed to divergent for easier soldering.

Acknowledgements:
This project is based on @炽羽渡尘's project with slight modifications. The positions of the SIM female connector and power supply were adjusted to fit the housing.
References:

https://blog.siriling.com:1212/2023/04/12/5g-modem-fibocom-fm350-gl/
https://blog.csdn.net/qq_41354243/article/details/140923865
https://oshwhub.com/yizhidianzi/gl3224-usb3-0-sdio
https://www.waveshare.net/wiki/RM500U-CNV

PDF_WWAN2USB_FM350.zip

Altium_WWAN2USB_FM350.zip

PADS_WWAN2USB_FM350.zip

BOM_WWAN2USB_FM350.xlsx

92164

[Verified] eZ-FET-Lite debugger/programmer

The Texas Instruments eZ-FET-Lite debugger, based on the MSP430F5528, uses a circuit derived from the publicly available schematic of the 5529LP. It can be used with UniFlash or CCS to develop or program Texas Instruments' MSP430F55 series microcontrollers.

Introduction:
            eZ-FET-Lite, launched by Texas Instruments (TI), is a lightweight debugger for onboard programmers and debuggers on MSP430F5529 and other series of microcontroller development boards. It uses the MSP430F55xx series microcontroller with USB peripherals as the main control chip, converting it into a serial port and TI's unique SBW interface (essentially a modified SWD) for microcontroller programming/debugging. Commonly found on early TI microcontroller development boards, it has now been replaced by the XDS110 series onboard debugger. Currently, its main purpose is to debug devices with older TI microcontrollers or to restore firmware for other eZ-FET-Lite devices (this is where TI's abstract approach comes in). The author's main purpose in creating this debugger was to try flashing the EV2400 firmware onto the F5528 using the eZ-FET-Lite after repeated unsuccessful attempts with the MSP430F5528.
Schematic & PCB Design:
            The schematic for this eZ-FET-Lite is a modified version of the programmer section of the Texas Instruments MSP430F5529 LaunchPad, almost a complete copy. I added some ESD protection circuitry and a USB-BSL download circuit (a useful function that Texas Instruments didn't use, resulting in bricked eZ-FET-Lite units needing to be restored using another working eZ-FET-Lite, which is quite abstract). I replaced the power supply IC with an easily found one, added a reset button, and brought out the programming port. That's about it. A few points to note when replicating:

I recommend soldering the F5528 and USB connector first, then the rest, otherwise it's difficult to solder.
For the F5528, I suggest finding a used, cut-down board on Xianyu (a second-hand marketplace) and disassembling it yourself. Taobao has no good quality ones; I've bought seven and none have worked properly. Alternatively, if you have a broken 5529 development board, you can simply remove the 5528 from it, saving you the trouble of programming.
You or a classmate need to have an eZ-FET-Lite first, otherwise you can't program it (I know this sounds incredible, but I had no choice; this is how Texas Instruments made it, so this is the only way. I heard there was a BSL programming program for the 5528, but I haven't found it yet; I'm still exploring).
The attachment contains firmware extracted from a working eZ-FET-Lite. You can also download the publicly available eZ-FET-Lite resource package from Texas Instruments and find the firmware there.

Programming steps (also the method for unbricking an eZ-FET-Lite):
(Most of this text is copied from @hexesdesu, thank you!)

Find a programmer that can program the 5528. The LaunchPad's onboard eZ-FET-Lite or FET430UIF will work. Connect it to the prepared board in the following order: SBW-RST-->RST; SBW-TST-->TEST; 3V3-->3.3V; GND-->GND.
Install the UniFlash tool on your computer and download the Ez-FET lite resource package.
Unzip the resource package and find the firmware file eZ-FET lite rev 1.10 Release PackageFirmwareEZFET_LITE_Rev1_1_BSL_1_1.txt. Copy it out (you can also use the new firmware I uploaded below).
Open UniFlash, select the MSP430F5528 chip and connector. The first connector should be selected by default. (For the current version, there's an auto-detection option at the top. If auto-detection is enabled and the programmer is properly connected to the microcontroller, it will automatically recognize the target microcontroller. Just click on it (as shown in the image, simply click START to enter).) On the Settings & Utilities page, find the Erase section and click Mass Erase. Wait for the erasure to complete. (Do not click EraseByAddress. If you are using the firmware with addresses 0x00-0x243ff or 0x4400-0x243ff below, you can enter those addresses in Start and EndAddress to perform a full chip erase.)
In the Download section above, check Allow Read/Write/Erase access to BSL memory. Return to the Program page
and select the firmware you just copied in Flash Image(s). (If you used the firmware I uploaded in the previous steps, select the corresponding firmware here.) Click Load. Upload the firmware to the image and wait for the upload success message.

Disconnect the burning cable and plug the target board directly into the computer. The computer will make a sound indicating a new device has been inserted, but you won't see it in Device Manager. Don't panic.
Open CCS or Energia (IAR hasn't been tested), and choose any program to upload. It will prompt you to update the firmware; select update (Energia will update automatically). After the update, your computer will see the two serial port devices. (If you use the new firmware extracted from the attachment below, this problem will not occur, and it will be recognized directly.)


Shell:
          The shell is printed using a 3D printer. The attachment includes the files and sticker files. It is recommended to print the sticker files on 32x52mm A4 self-adhesive paper. The shell and sticker files are in the attachment. You will need to use M2 thermoplastic nuts and countersunk screws to connect the top and bottom covers.
Usage Example:
            As I mentioned earlier, I made this for flashing firmware onto the 5528. Actually, it's not really a forced flash, because the MSP430F55 series uses the same core; only some peripherals differ. The EV2400 only uses a few pins. Those cheap domestic EV2400s on Taobao and Xianyu are actually from this source. Other ICs in the MSP430F55 series, flashed with EV2400 firmware, won't cause problems when operating non-existent peripherals, so they can still run normally. Since it's the same core, there's no question of one being better than the other; it's just that cheaper ones use salvaged parts with unknown remaining lifespans.
Attached are some usage photos without a case:
(Burning the EV2400's F5529 program onto a 5528 using the EV2400 after a failed USB-BSL flashing attempt).
Photos of it used with the flashing clip
. A debugger that has been made and tested is also available (the standard EV2400 and 5528 versions of the EV2400 will be open-sourced later).