Small UAV based on Espressif ESP32-S2/ESP32

ESP-Drone can be connected and controlled through Wi-Fi network using mobile APP or game controller. Currently, it supports multiple modes such as self-stabilizing flight, fixed-altitude flight, and fixed-point flight. This solution has a simple hardware structure, clear code structure, supports function expansion, and can be used in STEAM education and other fields.

Schematic PCB

Sensorless sine wave drive application solution based on MM32SPIN motor/power supply chip - handheld vacuum cleaner

This article briefly introduces the application example of sensorless sine wave drive technology based on MM32SPIN25 in "handheld vacuum cleaner".

Bluetooth selfie stick solution based on MM32W wireless MCU

​Introducing an application solution for Bluetooth products that is very common in everyone's life, a Bluetooth selfie stick application developed based on the MM32W series.

Temperature and humidity monitor solution based on MM32W wireless MCU series

Introducing a Bluetooth application solution with rich usage scenarios - a temperature and humidity monitor developed based on the MM32W series.

Commonly used 4-string lithium battery protection board design information

The most commonly used lithium battery protection circuit drawing, 4 strings

Schematic PCB

IOT desk lamp design

RSL10 QFN EVB is used as the main control of IOT lamps. Because the GPIO of RSL10 is limited, the data protocol adopts single-line return-to-zero code communication method. The system only needs one GPIO1 as the LED RGBW driver. GPIO is used to drive WS2812. WS2812 is a control circuit and An intelligent externally controlled LED light source with integrated light-emitting circuit. Its appearance is the same as a 5050LED lamp bead, and each component is a pixel. The pixel contains an intelligent digital interface data latch signal shaping amplification drive circuit, a high-precision internal oscillator and a 12V high-voltage programmable constant current control section, which effectively ensures that the color of the pixel light is highly consistent. , the other ADC port is used to collect the temperature of the lamp, and when the temperature exceeds the limit standard, it automatically reduces the luminous efficiency of the lamp to avoid burning out the LED due to excessive temperature.

Schematic PCB

Smart wearable devices based on RSL10

A smart wearable device based on the RSL10 development board officially provided by EEWORLD. This device is divided into two parts: the host and the slave. However, this MCU only has one UART, but in actual project requirements we need to use two UARTs. The organizer of this event gave five boards, so a board without a sensor is used as the SPI slave and will receive The command parses and uses AT commands to control the audio.

Schematic PCB

Environmental expert’s smart watch

The work is mainly based on smart watches as a product that contributes to mine operations. The shape of [RSL10-SENSE-GEVK] is perfect for making a watch. All the onboard peripherals are utilized. The watch will collect data every once in a while and store it in the onboard external Flash. A total of fourteen days of historical data can be stored. If the power consumption is reasonably designed, it can Replace the button battery every two months. Normally worn in the normal mode, you can enter the downhole mode by pressing the button. In the downhole mode, the surrounding environment will be detected. When the environment reaches a bad situation, it will enter the alarm state. At the same time, when the person going down the pit feels uncomfortable, he can long press the button to enter the call for help state.

Schematic PCB

Sugar glider health management system based on RSL10

The project uses RSL10 to build a sugar glider health monitoring system. With good exercise and diet, my little jelly (sugar glider) can grow up healthily.

Schematic PCB

Running posture training shoes

This design is designed for foot posture. Wrong running posture can be corrected through real-time prompts on the mobile phone APP, thereby solving various adverse consequences caused by incorrect running posture.

Schematic PCB

iphone6-5.5+ schematic.zip

Apple's full series of drawings: iphone6-5.5+ schematics.

Schematic PCB

iPhone 5s Chinese schematic + component distribution diagram

Apple's full series of drawings: iPhone 5s Chinese schematic + component distribution diagram

Schematic PCB

Graduation project based on 51 microcontroller 8-key electronic keyboard design (schematic diagram, source program, etc.)

AT89C52 microcontroller is used as the core control component to design an electronic keyboard. The microcontroller is used as the main control core, and it forms the core main control module together with the keyboard speaker and other modules. The main control module is equipped with 8 buttons and a reset button.

Schematic PCB

Design of forehead thermometer based on STM8S handheld non-contact infrared thermometer gun MLX90614 (schematic diagram, PCB, source program)

Based on the STM8S handheld non-contact infrared thermometer gun MLX90614 forehead temperature gun design, including schematic diagram, PCB, source program, etc.

Schematic PCB

High-precision LED electronic clock design based on STM8 (all design materials)

Based on STM8S003K3 microcontroller, it has alarm and chime functions and automatic light sensing function.

Schematic PCB

Snake game design based on STM32 (program, PCB)

Snake game design based on STM32, including program and PCB files

Schematic PCB

Tetris design based on STM32 (source program, schematic diagram, PCB)

Tetris design based on STM32, including source program, schematic diagram, and PCB files

Schematic PCB

Infrared remote control alarm (schematic + PCB diagram + program + documentation).rar

The infrared controlled temperature alarm produced for this competition took half a month to make. It is a simple device made of AT89S52 with LCD 12864 as the display platform, including infrared remote control, temperature measurement, time display, alarm reminder and picture browsing. Infrared controlled temperature sensor.

Schematic PCB

Based on DA14580_ADXL362 schematic diagram (Xiaomi bracelet solution)

Based on DA14580_ADXL362 schematic diagram (Xiaomi bracelet solution)!

Schematic PCB

Electronic clock module schematic + PCB diagram (2012 version)

Electronic clock module schematic diagram + PCB diagram (2012 version), if you are interested, you can download it and take a look.

Schematic PCB