18650 charger based on TP5000

62054

Bingdundun key chain

Introduction: Bingdundun keychain 7.9*7.9cm

Bingdundun key chain DIY

Gerber_bingdundun.zip

BOM_bingdundun.csv

BOM download

PCB_bingdundun_2022-09-22.pdf

PCB_bingdundun_2022-09-22.json

Bingdundun_2022-09-22.pcbdoc

Gerber_bingdundun_2022-09-22.zip

62055

[Internet of Things] Hongmeng Smart WIFI Switch +4212619A

Introduction: Based on HiSilicon Hi3861 chip, intelligent WIFI switch

Based on HiSilicon Hi3861 chip, smart WIFI switch

VID_20220404_185929.mp4

BOM download

PCB_Hongmeng Smart WIFI Switch_PCB_2022-09-22.pdf

PCB_Hongmeng Smart WIFI Switch_PCB_2022-09-22.json

Hongmeng Smart WIFI Switch_PCB_2022-09-22.pcbdoc

Gerber_Hongmeng Smart WIFI Switch_PCB.zip

Schematic_[Internet of Things] Hongmeng Smart WIFI Switch +4212619A_2022-09-22.pdf

SCH_[Internet of Things] Hongmeng Smart WIFI Switch +4212619A_2022-09-22.json

Hongmeng Smart WIFI Switch_Schematic Diagram_2022-09-22.schdoc

62056

[Internet of Things] Hongmeng IoT Smart WIFI Switch

Introduction: Hongmeng Smart WIFI Switch

Use the Hongmeng Hi3861 chip combined with the servo to achieve WIFI remote control of physical switches in your home or dormitory.

VID_20220407_122241.mp4

BOM download

PCB_PCB_[Internet of Things] Hongmeng IoT Smart WIFI Switch_2022-09-22.pdf

PCB_PCB_[Internet of Things] Hongmeng IoT Smart WIFI Switch_2022-09-22.json

PCB_[Internet of Things] Hongmeng IoT Smart WIFI Switch_2022-09-22.pcbdoc

Gerber_PCB_[Internet of Things] Hongmeng IoT Smart WIFI Switch_2022-09-22.zip

Schematic_[Internet of Things] Hongmeng IoT Smart WIFI Switch_2022-09-22.pdf

SCH_[Internet of Things] Hongmeng IoT Smart WIFI Switch_2022-09-22.json

Sheet_1_2022-09-22.schdoc

62057

STLINK-V2.1 with virtual serial port VCP

Introduction: The board drawn by Lichuang Open Source stlink-v2.1 with virtual serial port is too big and not good-looking, so I draw a smaller one myself.

There was a zz error in the cover photo, which has been corrected in the shared file.
Attached is the stlink firmware with VCP

STLinkV2.J28.M18.bin

BOM download

PCB_PCB_STLINK_2022-09-22.pdf

PCB_PCB_STLINK_2022-09-22.json

PCB_STLINK_2022-09-22.pcbdoc

Gerber_PCB_STLINK.zip

Schematic_STLINK-V2.1 with virtual serial port VCP_2022-09-22.pdf

SCH_STLINK-V2.1 with virtual serial port VCP_2022-09-22.json

ST-LINKV2.1-USB male_2022-09-22.schdoc

62058

Cat.1 DTU extended version

Introduction: With 485 interface, Quectel EC600N-CN module is used as the communication module, and a 20pin custom interface is reserved.

As I wrote before,
this thing is actually my graduation project, but it is just for graduation. It is very simple and what function does it have?
There is a 485 interface, using the SP3485 chip. Friends who know how high the differential voltage of this thing can be can comment below wwwwww.
There is an onboard interface that is directly compatible with the EC600N-CN module (it seems to be called Jiang or something? Just go to the Quectel Taobao store), plug it in and use it.
It has a battery power interface and an independent switch (wide voltage input, AMS1117-5 solution).
It has a serial port. Generally, the CH340G
does not have many things, but it is very practical. It is great for IoT development. There is
a 20-pin customization reserved on the right side. I originally wanted to use this thing as a TFT interface, but later I found that this thing is much more practical than TFT. What can I do with this thing? No hhhhh
Is there a BUG?
Yes, there was an error on the serial port side, but it is a good solution.
Do not solder D5D6 when soldering. Only solder R19 on the left side (stand it up). Just fly the wire on the right side of the resistor to the lower pin of D5.
See the picture of the cute little red fly The
scalability of the cable (dense fog)
is very good. I have pins on both sides. I want to do whatever I want. How can I get the
source code
library of EC600N-CN? Please message me privately for
version update .
The next goal is to have no cavities
. Modify the hardware. Defect
Added Boost Module
Added Burner (daplink)
Shell DXF File See Attachment

Acrylic cover.dxf

BOM download

PCB_PCB_Graduation Project_2022-09-22.pdf

PCB_PCB_Graduation Project_2022-09-22.json

PCB_Graduation Project_2022-09-22.pcbdoc

Gerber_PCB_Graduation Project.zip

Schematic_Cat.1 DTU extended version_2022-09-22.pdf

SCH_Cat.1 DTU extended version_2022-09-22.json

Sheet_1_2022-09-22.schdoc

62059

speechless

Introduction: qwq

Trolley board

BOM download

PCB_PCB_Speechless Team_2022-09-22.pdf

PCB_PCB_Speechless Team_2022-09-22.json

PCB_Speechless Team_2022-09-22.pcbdoc

Gerber_PCB_Speechless Team.zip

Schematic_Speechless_2022-09-22.pdf

SCH_Speechless Team_2022-09-22.json

Main control board_2022-09-22.schdoc

62060

Very compact CKLink-Tiny[verified]

Introduction: A very compact CKLink debugger, suitable for W800 series chips, supporting virtual serial port

Since the resistors and capacitors are all in 0603 packages, there are some requirements for welding.
CK-LINK Tiny can directly use the firmware of CK-LINK Lite, which can be found in the W801 and W806 groups. The firmware burning method is the same as that of CK-LINK Lite, which can also be found in the group.
![IMG20220124111943.jpg]