OpenSimpleLidar: Open source laser rangefinder for SLAM and navigation

This is a very simple open source scanning laser rangefinder. It uses triangulation. Its components cost less than $35 (excluding shipping). This lidar is very useful in robotics - for SLAM and navigation tasks.

Schematic PCB

Quadrant: Gesture audio adjustment based on 4 TOF sensors

Schematic PCB

Bicycle speed measurement based on Hall sensor

Ultra-simple Hall sensor speed measurement, the value is displayed on the 16x02 LCD display

Schematic PCB

PX4 Robotic Drone Vehicle/Flight Management Unit (VMU/FMU) - RDDRONE-FMUK66

Schematic PCB

Three-Phase Power Meter Reference Design

The three-phase power meter reference design is used to measure and record active and reactive energy in directly connected three-phase networks. It is pre-certified to the European EN50470-1, EN50470-3, Class B and Class C, and IEC 62053-21 and IEC 62052-11 international standards for active energy class 2 and class 1 electronic meters.

Schematic PCB

Sub-μA current sensor based on Kinetis K22F

The Sub-μA Current Sensor is a Kinetis K22F based current measurement board running on FreeRTOS and can be used with the Freedom Development Ecosystem or any other Arduino-like development board.

This reference design allows for non-intrusive connection between any MCU and a 3.3V shield and measurement of a wide range of low currents (~60 nA – 5 mA). Multiple communication methods are available, including integration with Freedom Sensor Toolbox (CE).

Schematic PCB

2018 Electronic Competition Question D-Gesture Recognition Device (Anhui University)

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2018 Electronic Competition Question B-Fire Fighting Aircraft (Dalian University of Technology)

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2020 Electronic Competition Question D-Obstacle Avoidance Aircraft (Chongqing University of Science and Technology)

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2020 Electronic Competition Question A-Wireless Motion Sensor Node Design (Chengdu University of Information Science and Technology)

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2020 Electronic Competition Question A-Wireless Motion Sensor Node Design (Dalian University of Technology)

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2020 Electronic Competition Question A-Wireless Motion Sensor Node Design (East China Jiaotong University Institute of Technology)

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Distributed temperature and humidity acquisition system based on STM32H745I

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Window invisible magnetic sensor

2 Layers PCB 8.941 x 60.782 mm FR-4, 1.6 mm, 1, HASL with lead, Green Solder Mask, White silkscreen;

Schematic PCB

W489202ASN1_Ultrasonic sensor schematic diagram

Based on ESP32, HC-SR04 ultrasonic sensor

Schematic PCB

posture correction robot

It's common for computer users to bend over in front of a screen, which can eventually lead to back problems. There are various gadgets on the market that solve this problem by constantly reminding users to sit up straight, but most of them are not fun. So I made a fun little tool for this problem.

Schematic PCB

PixArt PMW3360DM-T2QU: Optical mouse sensor breakout board

PixArt PMW3360DM-T2QU optical mouse sensor breakout board that can operate at 1.8V or 3.3V voltage levels.

Schematic PCB

STR-NCS32100-GEVK: Reference design for ON Semiconductor rotary position sensor NCS32100

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Reference design of Epson multimeter microcontroller S1C17M02/M03

Can measure DC/AC voltage, DC/AC current, resistance, inductance, capacitance, diode, frequency. Built-in 16bit ADC, digital filter, RMS effective value circuit and peak hold circuit. Multimeter control unit integrated with microcontroller, officially launched reference design kit, powered by button battery, including schematic diagram.

Schematic PCB

MiniQ: a mini quadcopter

MiniQ is a mini quadcopter that is open source from hardware design to control algorithm. The algorithm used for the Altitude Heading Reference System (AHRS) is the DCM complementary filter. The system calculates the height and controls the output PWM of the four motors 1600 times per second. It can be controlled remotely via Bluetooth (Bluetooth Serial Port Profile).

Schematic PCB