3D printer WIFI SD card small card

BOM download

PCB_PCB_3D Printer SD Card Extension Second Edition copy_2022-09-24.pdf

PCB_PCB_3D Printer SD Card Extension Second Edition copy_2022-09-24.json

PCB_3D Printer SD Card Extension Second Edition copy_2022-09-24.pcbdoc

Gerber_PCB_3D Printer SD Card Extension Second Edition copy_2022-09-24.zip

Schematic_3D printer WiFi SD card large card 8266_2022-09-24.pdf

SCH_3D printer WiFi SD card large card 8266_2022-09-24.json

Sheet_1 copy_2022-09-24.schdoc

61511

STM32F103Z_BGA core board

Introduction: STM32F103Z_BGA package core board

============ Put ​​the important words first ==============
1. At present, it is only welding test, not all functions are tested (will test again after the holiday) ,
     1. The LCD data line is not sure whether there is a serial signal (it has been tested and there is a picture below)
     2. The SD card data line is not sure whether there is a serial signal
     3. The pin numbers are marked on both sides of the LCD, but the LCD is plugged in from the back (to prevent the gear pins) (picture below)
     4. Do not buy the original parts according to the BOM list, which may not be allowed
. 2. Soldering
     1. The stm32f103z in the BGA package is used (the new one is about 30 RMB)
     2. Although it is BGA, this is what I It doesn't feel like it's difficult to weld, you
 
can do it according to your ability.
========================== =============
 
stm32f103z should be familiar to everyone and I won’t say much =-=
===============BGA welding======== =========
You should all have an air gun and the like.
If you want to plant balls, scrape solder paste or something. Go to B station to find a video.
The temperature should not be too high. The steel mesh cannot stand
the flux. It is a necessity.
(I am too lazy to write emm when I have time)
 
 
================IO distribution================
     IO distribution It’s quite concentrated, don’t distract
     from the rest. You can read it by yourself =-= I was too lazy to write a description of
          the LCD slot when viewed from the front and
            the LCD slot when viewed from the back
================= ====================
=================LCD============ =====
ps The control address used here is A6 (the Atomic F4 uses A6),
so when using the LCD screen, you need to change #define LCD_BASE ((u32)(0x6C000000 | 0x000007FE)) to #define LCD_BASE ((u32 )(0x6C000000 | 0x0000007E))
 
================ Attached Pictures ==================
======= ==============================
That's it (I'm lazy).
This design uses 103 in bga package (yes This is the difference)
 

BOM download

PCB_STM32F103Z_2022-09-24.pdf

PCB_STM32F103Z_2022-09-24.json

STM32F103Z_2022-09-24.pcbdoc

Gerber_STM32F103Z.zip

Schematic_STM32F103Z_BGA core board_2022-09-24.pdf

SCH_STM32F103Z_BGA core board_2022-09-24.json

STM32F103ZE_2022-09-24.schdoc

61512

ETA3000+BM3451 lithium battery protection balance

Introduction: BM3451 battery protection + ETA3000 active balancing board, to be verified. The size of the board is 17cm*65cm, which is very small. It is necessary to verify the heat dissipation performance of the board and whether there is any conflict in the shutdown of charging between the two chips.

BM3451 battery protection + ETA3000 active balancing board, to be verified.

61513

Automatic winding machine based on Mega2560 and TB6600

Introduction: This is a project to automatically wind the electronic rotor. The microcontroller solution is arduino mega2560. The motor drive solution is Toshiba's TB6600, and the alternative solution is Trinamic's MTC2160.

This is a project for automatic winding of electronic rotors. The microcontroller solution is arduino mega2560, and the motor drive solution is Toshiba's TB6600

BOM_Atmega2560 microcontroller_Mega2560_2022-11-05.xlsx

Altium_Automatic winding machine based on Mega2560 and TB6600_2022-11-05.zip

PCB_Mega2560_2022-11-05.pdf

PDF_Automatic winding machine based on Mega2560 and TB6600_2022-11-05.zip

61514

Tactile Rubik's Cube and Pulse Summary

Introduction: Read the piezoresistive sensor signal, amplify it, and communicate using Bluetooth

The function of the DIP switch is to switch who is connected to the microcontroller, external serial port and Bluetooth.

BOM download

PCB_PCB_Tactile Rubik's Cube and Pulsation Summary_2_2022-09-24.pdf

PCB_PCB_Tactile Rubik's Cube and Pulse Summary_2_2022-09-24.json

PCB_Tactile Rubik's Cube and Pulsation Summary_2_2022-09-24.pcbdoc

Gerber_PCB_Tactile Rubik's Cube and Pulse Summary_2_2022-09-24.zip

PCB_Interface Board_2022-09-24.pdf

PCB_interface board_2022-09-24.json

Interface board_2022-09-24.pcbdoc

Gerber_interface board.zip

Schematic_Tactile Rubik's Cube and Pulsation Summary_2022-09-24.pdf

SCH_Touch Rubik's Cube and Pulse Summary_2022-09-24.json

Summary of touch cube and pulsation_2022-09-24.zip

61516

stm32 motor driver

Introduction: stm32 motor driver

1. The RS485 interface is designed to meet the lightning protection test requirements of IEC61000-4-5 or GB17626.5 standards, common mode 6KV, differential mode 2KV. D4 is a three-terminal gas discharge tube that forms the first-level protection circuit to suppress the line. Common mode and differential mode surge interference to prevent interference from affecting the next stage circuit through the signal line. The nominal voltage VBRW of the gas discharge tube is required to be greater than 13V, and the peak current IPP is required to be greater than or equal to 143A. The peak power WPP is required to be greater than or equal to 1859WPTC1 and PTC2 are thermal sensitive The resistor forms the second-level protection circuit. The typical value is 10Ω/2W. To ensure that the gas discharge tube can conduct smoothly, this resistor must be added to divide the large energy to ensure that most of the energy goes through the gas discharge tube D1~D3. It forms a third-level protection circuit for TSS tubes (semiconductor discharge tubes). The nominal voltage VBRW of TSS tubes is required to be greater than 8V, the peak current IPP is required to be greater than or equal to 143A; the peak power WPP is required to be greater than or equal to 1144W;
2.1.TIP32C is a high-power PNP Type transistor, UCEO=100V, IC=3A (continuous) or 5A (peak), power dissipation PD=40W; L7805 realizes 5V voltage regulation;
3.GC8871/DRV8871 brushed DC motor driver chip with internal current sensing function , suitable for printers, electrical appliances, industrial equipment and other small machines. Two logic inputs control the H-bridge driver, which consists of four NMOSs and is capable of bidirectional motor control at peak currents up to 3.6A. Current decay mode allows the motor speed to be controlled by pulse width modulation (PWM) of the input. If both inputs are driven low, the motor driver will enter a low-power sleep mode.

PCB_stm32 motor driver.json

BOM download

Schematic_stm32 motor driver_2022-09-24.pdf

SCH_stm32 motor driver_2022-09-24.json

stm32 motor driver_2022-09-24.zip

61517

[Internet of Things] Hongmeng Internet of Things—Smart WiFi switch

Introduction: IoT smart WiFi switch based on Hongmeng system

IoT smart WiFi switch based on Hongmeng system

8AB77BF43DCA9090BA30F45B81135AA0.png

7E5C7398-DBEF-4CEB-8904-1B394C0A58D7.mp4

BOM download

PCB_PCB_[Internet of Things] Hongmeng Internet of Things—Smart WiFi Switch_3_2022-09-24.pdf

PCB_PCB_[Internet of Things] Hongmeng Internet of Things—Smart WiFi Switch_3_2022-09-24.json

PCB_[Internet of Things] Hongmeng Internet of Things—Smart WiFi Switch_3_2022-09-24.pcbdoc

Gerber_PCB_[Internet of Things] Hongmeng Internet of Things—Smart WiFi Switch_3.zip

Schematic_[Internet of Things] Hongmeng Internet of Things—Smart WiFi Switch_2022-09-24.pdf

SCH_[Internet of Things] Hongmeng Internet of Things—Smart WiFi Switch_2022-09-24.json

Hongmeng Smart WiFi Switch_2022-09-24.schdoc

61518

[Training Camp] Internet of Things Clock Wu Kaimao

Introduction: Clock based on ESP-C3-12F WIFI chip module

Design an IoT clock project using Essence ESP-C3-12F WIFI chip

IMG_7540(1).MP4

BOM download

PCB_IoT clock PCB_2022-09-24.pdf

PCB_IoT clock PCB_2022-09-24.json

IoT clock PCB_2022-09-24.pcbdoc

Gerber_IoT clock PCB.zip

Schematic_[Training Camp] Internet of Things Clock Wu Kaimao_2022-09-24.pdf

SCH_[Training Camp] Internet of Things Clock Wu Kaimao_2022-09-24.json

[Training Camp] Internet of Things Clock Wu Kaimao_2022-09-24.zip

Schematic_[Training Camp] Internet of Things Clock Wu Kaimao_2022-09-24.pdf

SCH_[Training Camp] Internet of Things Clock Wu Kaimao_2022-09-24.json

[Training Camp] Internet of Things Clock Wu Kaimao_2022-09-24.zip

61519

electronic