Lithium battery charging-output board

Battery charging module.rar

BOM download

PCB_PCB_Lithium battery charging-output board_2_2022-09-24.pdf

PCB_PCB_Lithium battery charging-output board_2_2022-09-24.json

PCB_Lithium battery charging-output board_2_2022-09-24.pcbdoc

Gerber_PCB_Lithium battery charging-output board_2_2022-09-24.zip

PCB_PCB_Lithium battery charging-output board_2022-09-24.pdf

PCB_PCB_Lithium battery charging-output board_2022-09-24.json

PCB_Lithium battery charging-output board_2022-09-24.pcbdoc

Gerber_PCB_Lithium battery charging-output board_2022-09-24.zip

Schematic_Lithium battery charging-output board_2022-09-24.pdf

SCH_Lithium battery charging-output board_2022-09-24.json

Sheet_1_2022-09-24.schdoc

61393

#十三级电竞# USB power meter that supports PD fast charging protocol

Introduction: A power meter with a full-featured type-C interface, supporting C-port input and C-port output devices. Supports devices with maximum power voltage not exceeding 18v (affected by component withstand voltage) and current not exceeding 3A

1. Project function introduction
uses a full-featured type-c interface, which not only detects power, but also has data transmission and other functions. It also supports the PD fast charging protocol and can detect the fast charging power of devices that support the PD protocol. Data is displayed through a 0.91-inch Oled screen.
 
2. The project attributes
are improved based on the official open source project. The change is that type-a is replaced by full-featured type-c, which supports PD fast charging protocol.
3. Open Source Agreement
This project is completely open source. (This PCB is not suitable for the official example male case)
The ams1117 voltage regulator is used to convert 18v to 3.3v, which can be replaced by the DCDC circuit in the official example.
The amplification factor of the current sensing amplifier is 50V/V. If you choose other models, you need to adjust the code.
 
4. Hardware part
1. The main control
N32G430C8L7 microcontroller product uses a high-performance 32-bit ARM Cortex™-M4F core, integrates a floating-point unit (FPU) and digital signal processing (DSP), and supports parallel computing instructions. The maximum operating frequency is 128MHz, it integrates up to 64KB of on-chip encrypted storage Flash, supports multi-user partition permission management, and supports 16KB of embedded SRAM. Built-in an internal high-speed AHB bus, two low-speed peripheral clock buses APB and bus matrix, supports 40 reusable I/Os, provides rich high-performance analog interfaces, including a 12-bit 4.7Msps ADC, supports 16 external Input channels and 3 internal channels also provide a variety of digital communication interfaces, including 4 U(S)ART, 2 I2C, 2 SPI/I2S, and 1 CAN 2.0B communication interface. The N32G430C8L7 microcontroller product can stably operate in the temperature range of -40°C to +105°C, with a power supply voltage of 2.4V to 3.6V, and provides a variety of power consumption modes. This case does not use many resources. The internal clock has been open sourced to meet the design requirements, so there is no need for an external clock circuit. It should be noted that each power supply pin of the chip needs to be connected to an additional 100nF external filter capacitor, and pin 1 of the chip needs to be connected to an additional 4.7uf filter capacitor.
2. The voltage conversion
uses the ams1117 voltage regulator chip that converts up to 18v to 3.3v. The maximum output is 1A, which is enough for the microcontroller. The circuit connection is relatively simple and suitable for this design.
3. Current Sampling
The current sampling part is the INA199B1DCKR current sense amplifier, (also called a current sense amplifier) ​​which is often used for overcurrent protection, precision current measurement or closed-loop feedback circuits for system optimization. This family of devices senses the voltage drop across a shunt resistor at a common-mode voltage of –0.3V to 26V, independent of the supply voltage.
5. Software part
The software part is mainly the driver of ADC and OLED. The detected voltage value and current value are read through ADC, and the data is displayed on the screen through OLED driver. For details, please see project attachment
 
6. BOM list.
BOM list please see attachment
 
*7. Contest LOGO verification
 8. Demonstrate your project and record it as a video and upload
 
the video. See attachment
 

N32G430C8L7-USBMeter_v1.0.1 (1).zip

QQ video 20220830100931.mp4

61394

miniUSB-to-C

Introduction: The schematic diagram of modifying the Philips toothbrush charging box to use the Type-C interface,
please ignore
the modification process, please see https://post.smzdm.com/p/a2598ndq/

BOM download

PCB_PCB_2020-02-11 12_04_57_2022-09-24.pdf

PCB_PCB_2020-02-11 12 04 57_2022-09-24.json

PCB_2020-02-11 12_04_57_2022-09-24.pcbdoc

Gerber_PCB_2020-02-11 12_04_57_2022-09-24.zip

Schematic_miniUSB-to-C_2022-09-24.pdf

SCH_miniUSB-to-C_2022-09-24.json

Sheet_1_2022-09-24.schdoc

61395

BETA BT2.0

Introduction: Charging module based on IP5303

Adaptive charging current
programmable cut-off voltage
(supported but I couldn't find how to use it, so it's not shown in the picture). It's drawn
according to the official principle. There should be no problem.
I haven't verified that
the PCB appearance is based on BETAFPV BT2.0 Cetus Pro charging. Block - Jialichuang EDA open source hardware platform (oshwhub.com)
 

PCB_BETAFPV_BT2.0 interface 4.35V charging stand_PCB_2022-06-15.json

BOM download

61396

[Internet of Things] Hongmeng smart switch related projects

Introduction: Use hi3861's Hongmeng smart switch to control the servo to turn on and off the lights through wifi

Use hi3861's Hongmeng smart switch to control the servo to turn on and off the lights through wifi

VID20220404185646.mp4

BOM download

PCB_PCB_[Internet of Things] Hongmeng smart switch related projects_2022-09-24.pdf

PCB_PCB_[Internet of Things] Hongmeng smart switch related projects_2022-09-24.json

PCB_[Internet of Things] Hongmeng smart switch related projects_2022-09-24.pcbdoc

Gerber_PCB_[Internet of Things] Hongmeng smart switch related projects.zip

Schematic_[Internet of Things] Hongmeng smart switch related projects_2022-09-24.pdf

SCH_[Internet of Things] Hongmeng smart switch related projects_2022-09-24.json

Sheet_1_2022-09-24.schdoc

61397

electronic