DIY Semi-Automatic Coffee Machine Mainboard - Single Extraction

PDF_DIY Semi-Automatic Coffee Machine Motherboard - Single Extraction.zip

Altium_DIY Semi-Automatic Coffee Machine Motherboard - Single Extraction.zip

PADS_DIY Semi-Automatic Coffee Machine Motherboard - Single Extraction.zip

BOM_DIY Semi-Automatic Coffee Machine Motherboard - Single Extraction.xlsx

94585

STM32F compatible development board (LQFP48)

Pin-compatible with most STM32 series chips, onboard DapLink debugger module. Supports serial port and SWD protocol. Convenient for Keil 5 or VS Code development.

The STM32F series pin-compatible development board (LQFP48)
is pin-compatible with most STM32 series chips and includes a daplink debugger. It supports serial port and SWD protocols. For convenient development
and debugging with Keil 5 or VS Code, the CH32V203F6P6 chip is supported. This debugger
supports most LQFP48 pin-compatible embedded chips, including
the AT32F series (421, 403a, 415)
, N32G series (435, 455, 452, 430),
CH32V series (V203)
, HK32F series (F103)
, GD32 series (E203),
APM32F series (103),
and AGM series.

IMG_20240513_152957.jpg

APM32F103CBT6.jpg

AT32F403ACCT7.jpg

CH32V203_2.jpg

PDF_stm32f compatible development board (lqfp48).zip

Altium_stm32f compatible development board (lqfp48).zip

PADS_stm32f compatible development board (lqfp48).zip

BOM_stm32f compatible development board (lqfp48).xlsx

94586

STM32F407VET6 Expansion Board

Design based on LCSC Skystar STM32F407VET6 expansion board

This expansion board design, based on the LCSC SkyStar STM32F407VET6, is rather rudimentary, lacking many functionalities. Another issue is that the 7-pin OLED will obstruct ST-Link downloads, so it should not be soldered. This design brings out 80 GPIOs from the STM32F407VET6 core board using headers and includes some onboard peripherals: 1. Three LEDs and one RGB LED. 2. Five user-defined buttons and a rotary encoder. 3. A DS1302 real-time clock module (with battery). 4. A DHT11 temperature and humidity module. 5. A potentiometer and photoresistor for ADC sampling. 6. A buzzer module. 7. Bluetooth and Wi-Fi interfaces. 8.
Basic testing of the 0.96-inch OLED screen and 1.8-inch TFT screen is complete. The code, written using the standard library, is attached.

QQ Video 20240524114843.mp4

6-1TFT1.8.zip

2-1LED.zip

3-1OLED.zip

PDF_STM32F407VET6 Expansion Board.zip

Altium_STM32F407VET6 Expansion Board.zip

PADS_STM32F407VET6 Expansion Board.zip

BOM_STM32F407VET6 Expansion Board.xlsx

94588

PY32f002A_mini

For reference only: PY32F002AF15_mini development board, using QFN20 package.

The boot0 pin in the diagram is brought out on the back, and pull-down/pull-up resistors can be soldered on to achieve this.
The reset pin has no external circuitry and is only used as a general I/O port.
R1 and R2 are optional. This is based
on personal testing, using only the official ST-Link programming script, and no in-depth stability testing has been performed. This is more of a personal entertainment product and is for reference only.
I am a beginner, so please point out any errors in the diagram. Thank you.

PDF_PY32f002A_mini.zip

Altium_PY32f002A_mini.zip

PADS_PY32f002A_mini.zip

BOM_PY32f002A_mini.xlsx

94589

Tossable Smart Torch v0.1

This small nightlight features a built-in ESP32 and MPU6050 gyroscope, which can detect movement to adjust brightness and lighting modes.

This small nightlight, with a built-in ESP32 and MPU6050 gyroscope, can detect movement to adjust brightness and lighting mode.
The ESP32 drives PWM dimming, and strange phenomena occur at certain frequencies. It's an amateur hobby, and the circuit design is very sloppy.
Please do not place it on your bedside table!!!

5f5d56dfab7437fc6393707c3189a97.jpg

4b49c7908740e653c86eecbf4c47f41.jpg

41cc412d1b87e26c9511382d6968cd6.jpg

156ae4ce1fae02a83a1179aef4f7227.jpg

PDF_Tossable Smart Torch v0.1 (Tossable Light).zip

Altium_Tossable Smart Torch v0.1 (Tossing Light).zip

PADS_Tossable Smart Torch v0.1 (Tossing Light).zip

BOM_Tossable Smart Torch v0.1 (Tossable Light).xlsx

94590

Yaesu Yaesu FT-4XR Walkie Talkie Charger

This Yaesu FT-4XR walkie-talkie charger uses the schematic of the Baofeng UV-5R charging dock.
It has been verified to be usable. However, the HX4068 gets quite hot during charging; be careful to avoid burns.

Update 2024-05-24:
To improve charging voltage, the wiring of the HX6048's BAT pin was updated. The output charging first passes through the battery and then returns to the BAT pin.
Update 2024-03-05



: The Schottky diode parameters were
modified from SS34 to MBRX140. The resistor package was changed from 0805 to 0603.
The positive and negative terminals of the output were optimized. The main circuit board layout was significantly changed, including chip and connector placement. The charging chip is now closer to the positive terminal.
Poor power supply or power bank ripple can cause the HX6048 to overheat, so the heat dissipation layout was improved.
The two inner right angles of the upper card frame PCB were changed to rounded arcs.
The CH224K was changed from single resistor analog voltage control of Type-C voltage to 3 digital voltage control of Type-C voltage. One resistor was removed. See the Schwarz text for details.
A 220uf/16V tantalum capacitor was added. To reduce height, a non-standard stamp hole recessed plate was used for soldering (unverified).



-----
 
The CH224K was used to trick the 12V of the Type-C port into powering the module. This is a Yaesu FT-4XR walkie-talkie charger, using the schematic of the Baofeng UV-5R charging dock.
The basic principle is to use a 12V source (either Type-C or DC) to power an 8.4V charging management chip, which then charges the walkie-talkie's two 4.2V*2=8.4V lithium batteries.
Improvements could be made by changing the spacing of the surrounding solder pads and replacing the surrounding PCB connector posts with 2.54mm pitch pin headers
, which would make soldering much easier. The assembly is quite complicated.
The spring contacts use antenna connectors, purchased from LCSC (BAT WIRELESS) BW0039BG-L3.0W2.0H1.5) https://item.szlcsc.com/2970169.html.
 
The soldering is complete; only
 
the Type-C contacts are used to extract 12V. The DC connector is not soldered as it's too bulky.
 
A green light indicates a fully charged battery,
 
 
while a red light indicates charging.
 
 

PDF_Yaesu Yaesu FT-4XR Walkie-Talkie Charger.zip

Altium_Yaesu FT-4XR Walkie-Talkie Charger.zip

PADS_Yaesu Yaesu FT-4XR Walkie-Talkie Charger.zip

BOM_Yaesu Yaesu FT-4XR Walkie Talkie Charger.xlsx

94591

Digital display of isolated HUB

USB 2.0 Digital Display Isolated HUB

Introduction: 
USB 2.0 Digital Display Isolation HUB

Application Scenarios: 
Computer-side protection for debugging high-voltage equipment via USB



. I. Product Introduction:
This USB isolation HUB connects data input via Type-C and isolates and converts out three USB-A ports and one USB-C port.
Three of the A ports have independent voltage and current detection and adjustable overcurrent and overvoltage protection
 
. Application Scenarios:
When debugging high-voltage equipment using a computer, it can isolate the high voltage from the computer data to prevent high voltage from entering the computer through the communication interface if the high-voltage equipment fails, causing the computer to malfunction .
When debugging external devices, you can try detecting the power of the external devices to monitor their operating status
 
. Product Overview:
The chip uses ADUM4160BRWZ to isolate the computer's input and output signals. Four USB interfaces are output via CH334P.
Two 1W isolated power supply modules are used to power the subsequent modules. Due to the small power of the isolated power supply, it supports 5V Type-C for additional power supply.
The MCU uses ESP32 C3. INA3221 is used for independent voltage and current detection and overcurrent and overvoltage protection of the three A ports. Information is displayed on the LCD screen
 
. Product Parameters:
Input Isolation Voltage: 750V;
Communication and Additional Power Supply: Maximum Input Voltage: 5.2V;
10-level Screen Backlight:
0.1~3A adjustable; Current Limiting:
Maximum Transmission Speed: 12. Mbps 
V. Instructions for Use:
**Caution!**
This device only protects the data input end. Other interfaces, including the external power supply interface, are not isolated. Please do not use expensive equipment to provide external power.
Due to isolation, USB 2.0 speeds will be significantly reduced. Actual testing showed that USB flash drive read/write speeds were only 1.5MB/s
. Without external power, the load capacity is very poor, with an output of only 1.7W and a large voltage drop.
 
 
For programming instructions and other information, please visit the Hardcore Innovation Community website (I'm too lazy to copy it here):
https://x.jlc.com/platform/detail/1e535482cde24b0088c3d01ec2c10da1

VID_20240501_000604.mp4

Firmware.rar

PDF_Isolated HUB Digital Display.zip

Altium_Isolated HUB Digital Display.zip

PADS_Isolated HUB Digital Display.zip

BOM_Isolated HUB Digital Display.xlsx

94592

electronic