809H adapter

PDF_809H converter.zip

Altium_809H adapter.zip

PADS_809H adapter.zip

BOM_809H adapter.xlsx

97297

Lithium battery USB-C port charging/discharging 5V output power supply board

I am Little Cabbage

Specifically, the datasheet shows the ETA9697E8A chip used, which outputs approximately 200mA-400mA of current at 5V to power low-power devices.

PDF_Lithium Battery Port C Charging/Discharging 5V Output Power Supply Board.zip

Altium lithium battery USB-C charging/discharging 5V output power supply board. (zip)

PADS_Lithium Battery Port C Charging/Discharging 5V Output Power Supply Board.zip

BOM_Lithium battery C-port charging/discharging 5V output power supply board.xlsx

97298

jms578 card opener

JMS578 Card Opener Independent Switch

JMS578 Card Opener Independent Switch

JMS578 Firmware Programmer Backup

jms578 write-protected firmware.zip

JMS578 schematic diagram.pdf

PDF_jms578 card opener.zip

Altium_jms578 card opener.zip

PADS_jms578 card opener.zip

BOM_jms578 card opener.xlsx

97299

DPLINK

Using STM32F103CBT6 as the main controller

It uses an STM32F103CBT6 main controller, a DC-DC step-down circuit, and a TPE-C interface.
 
 
 
 
 
 

V2.bin

PDF_DPLINK.zip

Altium_DPLINK.zip

PADS_DPLINK.zip

BOM_DPLINK.xlsx

97300

51 Minimum System Board (Surface Mount)

51 Minimum System Board (Surface Mount Small Size Version)

Verified and approved. There are two modifications: First, the switch, which was originally a half-switch, has been changed to a double-sided self-locking switch, meaning the two sides can be directly connected, eliminating the need to distinguish between the front and back. Second, the USB port has been changed to micro for greater universality.

WeChat image_20231106175229.jpg

WeChat image_20231106175241.jpg

PDF_51 Minimal System Board (Surface Mount).zip

Altium_51 Minimum System Board (Surface Mount).zip

PADS_51 Minimum System Board (Surface Mount).zip

BOM_51 Minimum System Board (Surface Mount).xlsx

97301

TPS61094 Supercapacitor Charging Board

TPS61094 Supercapacitor Charging and Discharging Board

The TPS61094 features a wide input voltage range and an output
voltage . When the TPS61094 is charging a supercapacitor in buck mode
, the charging current and termination voltage can be programmed using two external resistors
. When the TPS61094 operates in boost mode, the output voltage can be programmed using
one external resistor.
In automatic buck or boost mode (EN = 1, MODE = 1), upon
applying an input power supply, the device bypasses the input voltage to the output while simultaneously
charging the backup supercapacitor. When the input power supply is disconnected or falls below
the target output voltage, the TPS61094 enters boost mode and
regulates the output voltage via the backup supercapacitor. The TPS61094
consumes 60nA of quiescent current in this mode.
The TPS61094 supports true shutdown mode (EN = 0, MODE = 1) and
forced bypass mode (EN = 0, MODE = 0). In true shutdown mode
, the TPS61094 completely disconnects the load from the input power supply. When
forced , the TPS61094
connects the load directly to the input voltage via a bypass switch and consumes only 4nA of current, thereby extending battery
life .

PDF_TPS61094 Supercapacitor Charging Board.zip

Altium_TPS61094 Supercapacitor Charging Board.zip

PADS_TPS61094 Supercapacitor Charging Board.zip

BOM_TPS61094 Supercapacitor Charging Board.xlsx

97302

USB to TTL

USB to TTL module

The CH340E chip is used to implement USB to TTL conversion
and an LDO chip is added. Due to its own requirements, the 3.3V interface is not brought out. If needed, it can be modified to bring out the interface.
 

PDF_USB to TTL.zip

Altium_USB to TTL.zip

PADS_USB to TTL.zip

BOM_USB to TTL.xlsx

97304

STC12C5A60S2 Minimum System

STC12C5A60S2 Minimum System

Bilibili video link: https://www.bilibili.com/video/BV1nN4y1r7Ej/?vd_source=22f2e51672b8e25786b9935cba3c3d13
Personal chat: Thanks to JLCPCB for the colorful silkscreen printing, it's beautiful and the colors are vibrant. I hope they can hold similar events again. Secondly, it's also good preparation for my studies; I've learned a lot, thank you very much.
                                 For those who aren't good at soldering, using reasonably priced, highly fluid solder wire will make soldering LQFP chips much easier. If you're not skilled, practice more, and you'll quickly master the technique and benefit. You can even slightly replace the micro USB port with the same device with larger pins to avoid failures that could damage your confidence.
 
The circuit has been tested and is working properly. The chip used is STC12C5A60S2, whose instruction code is fully compatible with the traditional 8051, but is 8-12 times faster. We can see that port COM4 is connected normally, and the program can be burned normally.
 
The circuit diagram is shown below. For
the burning process, if you can't see it clearly, you can watch the video link. I apologize for not knowing how to upload a video this time.
If this project has been helpful to you, please take a little time to give me a like. I would be very grateful to you. Please point out any shortcomings. Thank you very much.
 

Config_BOM_2023-10-26.json

Burning demonstration.mp4

PDF_stc12c5a60s2 Minimal System.zip

Altium_stc12c5a60s2 Minimal System.zip

PADS_stc12c5a60s2 Minimal System.zip

97305

USB HUB-V3 based on SL2.1A

1-to-6 expansion dock based on SL2.1A

This project is a USB hub based on the SL2.1A chip. Placing it on an office desk eliminates the need to crawl under the desk to plug in USB drives. Connecting a Bluetooth receiver also makes using a Bluetooth keyboard and mouse more convenient, resulting in a cleaner desktop.
Specific functions include:

expanding one USB port to six ports
; a separate USB port; using a CH340N converter to TTL
serial port for programming; and one-click download support.

Note:

RXD and TXD have already been reversed; do not reverse them when downloading programs.
If you are not soldering a crystal oscillator, you can ground the chip's XI pin.
The switch on the CAD panel file needs to be removed and replaced with an opening. You can buy nylon posts on Taobao to insert, or use a long-handled button.
The USB hole in the panel file can be increased by 1mm; otherwise, it may be difficult to install after printing .

Upgrades:
Future upgrades may include the SL2.2S, adding independent power supply and other protection circuits; the casing may be 3D printed.
After installation: