Based on Southchip SC8701 buck-boost module

PDF_Based on Southchip SC8701 buck-boost module.zip

Altium_Based on Southchip SC8701 buck-boost module.zip

PADS_Based on Southchip SC8701 Buck-Boost Module.zip

BOM_Based on Southchip SC8701 buck-boost module.xlsx

92329

FT4232HPQ verification board

FT4232HPQ Verified Version

This project was originally intended for dual-channel JTAG + 2-channel UART + 1-channel IIC. The serial ports are currently being recognized correctly, and FT_PRO can also recognize the chip and EEPROM. However, when programming the JTAG using online tutorials, Vivado cannot be used for downloading.
Currently, it is being used with the default four-channel serial ports.
 
The hardware circuitry has no problems and can be directly prototyped.

6420958402782b4cd8d4444bd496695.jpg

PDF_FT4232HPQ Verification Board.zip

Altium_FT4232HPQ verification board.zip

PADS_FT4232HPQ verification board.zip

BOM_FT4232HPQ Verification Board.xlsx

92330

Training Camp Based on CW32F030 Voltage and Current Meter

Voltage and current meters based on CW32 development board

Hardware Part
1. Power Supply Circuit
[1] The schematic diagram not only shows the pin connections of each component, but also indicates the direction of current flow during circuit design. First, low-frequency filtering is achieved through electrolytic capacitors, and then high-frequency noise is filtered out through small-capacity capacitors.
[2] When designing a DC plug, attention should be paid to the inner diameter of the DC socket. Common types include DC2.1 and DC2.5. Determine whether the power connector and DC socket are suitable. [3] According to Li Gong's actual test, the power supply current of this circuit does not exceed 100mA, so a 120mA fuse with a 48V withstand voltage and a 78L05 chip are used. [4] Two TP test points are added to facilitate power supply confirmation and self-testing. Because of the common ground, the accuracy is theoretically very high, there is no extra interference, and even the GND line is not needed.
2. Voltage sampling circuit
3. Current sampling circuit
4. TL431 reference voltage
capacitor is used for decoupling. If it is commonly connected between A and R, it may cause self-oscillation, but it is generally not a problem. By using the TL431 circuit to provide a 2.5V reference voltage (actually measured to be about 2.48V), it can be seen from the chip manual that when the chip pins 1 and 2 are connected, VKA=VREF. IKA recommends a maximum current of 1mA, and the current limiting resistor R=(5V-2.5V)/0.001A=2.5K. However, the chip sink current can reach 100mA, and the damage is not significant. For example, with a current limit of 100mA, P=UI=2.5V*100mA=0.25W. Therefore, a power resistor with a current limit of greater than 0.25W should be selected. 5. Display and Operation Circuit
Software Part
1. Compiler Part
The most frequent question in the discussion group during this training camp was about software installation. The new version of KEIL has reached version 5.40 (May 2024). The download link for this version no longer provides the AC5 compiler, and CMSIS has also been updated to 6.1.0. This makes it impossible to compile most official examples correctly. These two parts need to be modified before compilation. Using version 5.XX in CMSIS is very important. 2. Program Part
The program should be written with reference to the official examples. See the official examples for details.
 

f36960f21ca9c9de9a9d0563140979ac.mp4

WeChat image_20240825235116.jpg

WeChat image_20240825235119.jpg

WeChat image_20240825235543.jpg

WeChat image_20240825235559.jpg

PDF_Training Camp Based on CW32F030 Voltmeter and Ammeter.zip

Altium Training Camp Based on CW32F030 Voltage and Current Meter.zip

PADS Training Camp Based on CW32F030 Voltage and Current Meter.zip

BOM_Training Camp Based on CW32F030 Voltage and Current Meter.xlsx

92331

Thermal Imaging 4117mini

Based on the TB-4117-3 thermal imager, this device has been modified to support both male and female Type-C connectors, allowing for direct connection and use with mobile phone data cables.

Based on the TB-4117-3 thermal imager, modifications have been made, including the design of a Type-C male and female adapter board, along with a CNC aluminum alloy shell made for 6.6 yuan. The affordable price brings a more premium feel, and the size has been reduced to half of the original, making it more convenient to carry!
 

Aluminum casing 111.STEP

Lens aluminum housing.STEP

PDF_Thermal Imaging 4117mini.zip

Altium_thermal imaging4117mini.zip

PADS_Thermal Imaging 4117mini.zip

BOM_Thermal Imaging 4117mini.xlsx

92332

32U4 chip 68-key keyboard

A 32u4, 68-key layout keyboard based on QMK.

This is a 68-key layout keyboard based on the ATMEGA32U4 controller, supporting open-source firmware such as QMK. The casing is custom-designed; this project is for personal DIY use only and should not be used for commercial purposes.
Note that the RGB lighting is full backlighting.
 
 

VID_20240910_122621.mp4

qmk firmware source code.zip

RGB68stm32_default.bin

RGB68_default.hex

PDF_32U4 chip 68 keyboard.zip

Altium_32U4 chip 68-key keyboard.zip

PADS_32U4 chip 68 keyboard.zip

BOM_32U4 chip 68-key keyboard.xlsx

92333

STK4152II

The STK4152II power amplifier module circuit has been successfully tested. It only requires incorrect soldering and can be powered on. This is my first time making an open-source project, so please be understanding.

The STK4152II power amplifier module circuit has been successfully tested. It only requires incorrect soldering and power-on. This is my first time making an open-source project, so please be understanding. [Images

: ![WeChat image_20240911095019.jpg]
![WeChat image_20240911095025.jpg]
![WeChat image_20240911095028.jpg]]