a birthday present

BOM download

PCB_Raspberry Pi expansion board PCB_2022-09-22.pdf

PCB_Raspberry Pi expansion board PCB_2022-09-22.json

Raspberry Pi expansion board PCB_2022-09-22.pcbdoc

Gerber_Raspberry Pi expansion board PCB_2022-09-22.zip

PCB_Stackable Raspberry Pi expansion board PCB copy_2022-09-22.pdf

PCB_Stackable Raspberry Pi expansion board PCB copy_2022-09-22.json

PCB_Stackable Raspberry Pi expansion board PCB_2022-09-22.pdf

PCB_Stackable Raspberry Pi expansion board PCB_2022-09-22.json

Stackable Raspberry Pi expansion board PCB_2022-09-22.pcbdoc

Gerber_Stackable Raspberry Pi expansion board PCB_2022-09-22.zip

Schematic_Raspberry Pi Heatsink_2022-09-22.pdf

SCH_Raspberry Pi Heatsink_2022-09-22.json

Sheet_1_2022-09-22.schdoc

Stackable Raspberry Pi expansion board PCB copy_2022-09-22.pcbdoc

Gerber_Stackable Raspberry Pi expansion board PCB copy_2022-09-22.zip

61975

Tmall Elf modified AUX output

Introduction: Add an AUX output to the Tmall Elf Sugar Cube to facilitate access to speakers with better sound quality or to connect to the car system.

The source project comes from the PCM5102APWR verification version. All optional function pins have been configured and can be used after connecting to the Tmall Elf Cube motherboard.
 
The motherboard comes with a 5V 5A ldo step-down chip, which can step down the Tmall Genie 12V input to 5V to facilitate powering various power amplifier modules.

BOM download

PCB_C964085_PCM5102 audio stereo DAC decoder verification board_2022-09-22.pdf

PCB_C964085_PCM5102 audio stereo DAC decoder verification board_2022-09-22.json

C964085_PCM5102 audio stereo DAC decoder verification board_2022-09-22.pcbdoc

Gerber_C964085_PCM5102 audio stereo DAC decoder verification board.zip

Schematic_Tmall Elf modified AUX output_2022-09-22.pdf

SCH_Tmall Elf modified AUX output_2022-09-22.json

PCM5102_2022-09-22.schdoc

61976

USB data cable organizer

Introduction: A simple data cable organizer

There are various data cables at home. It is inconvenient to take them out when tied up with cable ties, and they are messy when left untied. This device can conveniently store various USB data cables for easy access when using them. Easily stored later. The upper part has hook holes, which can be easily hung on the wall with sticky hooks. It is beautiful and easy to use.
 
The VCC and GND of all interfaces are connected together, and can also be used as a power supply board. One USB power supply, all interfaces are powered. It should be noted that there is no power detection function. If too many electrical appliances are connected, the power supply equipment may be damaged. .

BOM download

PCB_PCB_USB data cable organizer_2022-09-22.pdf

PCB_PCB_USB data cable organizer_2022-09-22.json

PCB_USB data cable organizer_2022-09-22.pcbdoc

Gerber_PCB_USB data cable organizer.zip

Schematic_USB data cable organizer_2022-09-22.pdf

SCH_USB data cable organizer_2022-09-22.json

Sheet_1_2022-09-22.schdoc

61977

【CW32】Brushless motor driver board

Introduction: The brushless motor control board based on CW32 can drive a high-power 8-wire Hall brushless motor and realize functions such as one-key start and stop, voltage and current detection, etc.

Completed schematic diagram and PCB...2022.6.1 Received PCB and components...2022.6.8 Completed debugging...2022.6.8

code.zip

BOM download

PCB_PCB_Brushless Motor Driver Board_2022-09-22.pdf

PCB_PCB_Brushless Motor Driver Board_2022-09-22.json

PCB_Brushless Motor Driver Board_2022-09-22.pcbdoc

Gerber_PCB_Brushless motor driver board.zip

PCB_PCB_[CW32] Brushless Motor_2022-09-22.pdf

PCB_PCB_[CW32] Brushless Motor_2022-09-22.json

PCB_[CW32] Brushless motor_2022-09-22.pcbdoc

Gerber_PCB_[CW32] Brushless motor.zip

Schematic_[CW32] Brushless Motor Driver Board_2022-09-22.pdf

SCH_[CW32] Brushless motor driver board_2022-09-22.json

【CW32】Brushless motor driver board_2022-09-22.zip

61978

[Training Camp] Diligent Zhong

Introduction: Using the HI3861 module, combined with 3D printing and a servo, this small clock is made up. It does not miss every minute. Why don’t you consider buying one for such a diligent alarm clock?

Warm reminder: > If you need to reproduce this project, be sure to choose water-soluble pens or whiteboard pens when purchasing pens. After all, you don’t want to go to the supermarket with your hands full of blue paint and be stared at by everyone o(╥﹏╥)o <Master Control Part of it uses Chuanzhi Education Hi3861 IoT WiFi module. This module is a system-in-package module based on HiSilicon Hi3861LV100 chip, which can provide complete Wi-Fi IoT development functions. The steering gear uses G90 steering gear. Because the No. 3 steering gear needs to support the pen tip and requires a relatively large force, it was replaced with an Adeept AD002 metal gear steering gear. It was purchased in Germany in 2020. The torque can reach 2.0kg/cm, which is perfect. support

HiBurn.exe

3D model.zip

firmware-plotclock.bin

test video 1.mp4

Severely compressed and cut low-quality version.mp4

BOM download

PCB_PCB_[Training Camp] Smart Scoreboard_2022-09-22.pdf

PCB_PCB_[Training Camp] Smart Scoreboard_2022-09-22.json

PCB_[Training Camp] Smart Scoreboard_2022-09-22.pcbdoc

Gerber_PCB_[Training Camp] Smart Scoreboard.zip

Schematic_[Training Camp] Diligent Bell_2022-09-22.pdf

SCH_[Training Camp] Diligent Zhong_2022-09-22.json

Sheet_1_2022-09-22.schdoc

61979

#十大电竞# Desktop voltage and ammeter with PD deception

Introduction: Based on CH224K and national technology N32G430C8, it can monitor the output voltage and current in real time, and can also adjust the decoy voltage to 9V/12V/15V/20V at any time.

 
* 1. The project function introduction
is based on CH224K and national technology N32G430C8. It can monitor the output voltage and current in real time, and can also adjust the decoy voltage to 9V/12V/15V/20V at any time. The equipment also has an anti-accidental touch function to avoid voltage caused by accidentally touching. sudden changes.
 
*2. Project properties
are disclosed for the first time
 
* 3. Open source agreement
GPL 3.0
 
 
 
*4.
The main control of the hardware part adopts the N32G430C8 of national technology. The N32G430 series uses a 32-bit ARM Cortex-M4F core with a maximum operating frequency of 128MHz and supports floating point operations and DSP instructions, integrated with up to 64KB embedded encrypted Flash, 16KB SRAM, integrated with rich high-performance analog devices, built-in 1 12bit 4.7Msps ADC, 3 high-speed comparators, integrated multi-channel U(S)ART, I2C, SPI, CAN and other digital communication interfaces.
 
The PD deception chip adopts CH224K, CH224 single chip integrated USB PD and other fast charging protocols, supports PD3.0/2.0, BC1.2 and other boost fast charging protocols, automatically detects VCONN and simulates E-Mark chips, and supports up to 100W power. , built-in PD communication module, high integration and streamlined peripherals. Integrated output voltage detection function, and provides over-temperature, over-voltage protection and other functions.
This chip can switch between different deception voltages through the high and low levels of 3 pins:
 
after issuing the deception command, the main control MCU realizes real-time monitoring through the ADC function pin combined with the voltage divider resistor. If the deception is successful, the corresponding indicator light will is lit, the OLED will display the current voltage and output current.
 
Buck chip
The buck chip uses LP2950ACDT-3.3RG. The maximum input voltage can reach 30V, the output voltage is 3.3V, the minimum voltage difference: 450mV@(100mA), the output current: 100mA, and the 3.3V 
 
anti-accidental touch
button can set the deception voltage. , after pressing and holding, the buzzer will prompt that the output voltage is about to be switched, and the OLED display will display the voltage value that is about to be switched. The button needs to be pressed for 3 seconds until the OLED displays CONFIG (confirm!), and the output voltage will be switched to the set value. , if the key duration is less than 3 seconds, the OLED will display CANCEL and the operation of changing the voltage will not be performed. Such a design can prevent accidental touches and avoid damage to electrical equipment caused by sudden voltage switching.
 
Real machine demonstration:
After pressing the button, the screen displays the voltage that is about to change:
Press the program for 3 seconds, the screen displays confirmation, and the voltage adjustment instruction is about to be executed:
Release the button midway, the display is cancelled, and the output voltage will not change:
The adjustment is completed, and the real-time display is displayed. Voltage, current and power:
 
 
*5. The software part of
the programming software uses KEIL. The relevant hardware support package and code can be downloaded in the attachment. The main code is in the main.c file. Some external libraries are referenced as needed. bsp_delay.h is used Supports delay function; bsp_key.h is used to process key input; bsp_led.h is used to process pin output, which is mainly used to drive the voltage indication LED and control the three pins of the deception chip; MonoScreen.h is used to drive OLED Display screen, the specific configuration can be found in the inc folder and the corresponding files can be changed.
 
The burning program uses SDW interface: 3.3V, GND, SWCLK, SWDIO, and uses Chuangxin Workshop's PWLINK. This burner supports a variety of mainstream chips, also supports KEIL online debugging, and also supports serial port communication. The configuration interface is as shown in the figure:
It should be noted that the level setting needs to be 3.3V to avoid damaging the OLED.
 
 
 
Note: If your project involves software development, please upload the corresponding project source code in the attachment. Here you can describe in detail your software flow chart, functional module block diagram, explanation or popular science of related algorithms, source code structure, construction and configuration of compilation environment, source code compilation method, program burning method, etc. It is recommended to introduce your ideas to others in the form of pictures and texts.
 
*6. The 3D shell
is being modeled and produced and may not be submitted before the deadline...
 
*7. BOM list
The BOM has been automatically generated at the bottom of the page
 
. Note: The BOM list involved in the project. Please upload a screenshot of the BOM at this location. Please upload the list details in PDF format to the attachment. Suggestions include model, brand, name, packaging, procurement channels, usage, etc. The specific content and form should be based on clearly expressing the project composition.
 
*8. Contest LOGO verification
 
* 8. Demonstrate your project and record it as a video and upload
 
 
the video title: Lichuang Electric Competition: {Project Name}-{Video Module Name}; such as Lichuang Electronic Competition: "Autonomous Driving" - Team Introduction .
 
 

N32G430C8 firmware.zip

"Desktop voltage and ammeter with PD deception"-Function introduction and demonstration.mp4

BOM download

PCB_PCB_#The 7th Lichuang Electric Competition#Desktop Adjustable Power Supply_2022-09-22.pdf

PCB_PCB_#The 7th Lichuang Electric Competition#Desktop Adjustable Power Supply_2022-09-22.json

PCB_#The 7th Lichuang Electric Competition#Desktop adjustable power supply_2022-09-22.pcbdoc

Gerber_PCB_#The 7th Lichuang Electric Competition#Desktop adjustable power supply.zip

Schematic_#The 7th Lichuang Electric Competition#Desktop voltage and ammeter with PD deception_2022-09-22.pdf

SCH_#十大电竞#Desktop voltage and ammeter with PD deception_2022-09-22.json

Sheet_1_2022-09-22.schdoc

61980

51 microcontroller simple heart-shaped lamp - version 3

Introduction: Pattern heart-shaped running water lamp based on STC89C52RC

It’s just a simple running water lamp that lights up again and again. The background image is something I found online before, plus some sweet words, hehe! I have tried the board with a free sample, and there is no problem. Just pay attention when welding the crystal oscillator. The current limiting resistor R1 does not need to be used. You can just adjust it according to the brightness. The program has already given the HEX file, so you can burn it in directly. That's it.

6458d1aa665ac41bc8bd3e19254c2e2f.mp4

Heart-shaped running water lamp.hex

BOM download

PCB_PCB_51 Microcontroller Simple Heart-Shaped Lamp-3 Edition_2022-09-22.pdf

PCB_PCB_51 Microcontroller Simple Heart-Shaped Lamp-3 Version_2022-09-22.json

Schematic_51 microcontroller simple heart-shaped lamp-3 edition_2022-09-22.pdf

SCH_51 MCU Simple Heart-Shaped Lamp-3 Version_2022-09-22.json

Sheet_1_2022-09-22.schdoc

PCB_51 Microcontroller Simple Heart-Shaped Lamp-3 Edition_2022-09-24.pcbdoc

Gerber_PCB_51 microcontroller simple heart-shaped lamp-version 3.zip

61981

electronic