• QN9080SIP-DK: Highly scalable QN9080SIP application development platform

    QN9080SIP-DK is a development kit supported by the QN9080-001-M17 module, supporting Bluetooth 5 and NFC.

    Schematic PCB

  • Add a Bluetooth remote control setting circuit to the 4-20mA two-wire passive digital display meter

    The RSL10 module is plugged into the self-made optocoupler isolation circuit board, and the entire module is connected in series with the modified target instrument (4-20mA two-wire passive digital display meter) and then connected to the 4- In the 20mA current loop, when the actual working zero current is 4mA, the target instrument displays 4.000mA in the current mode; the overall voltage drop of the circuit board of the work is 2.513V; the changed range or unit is sent to the RSL10 on the circuit of the work through the mobile APP Setting command, the target instrument (currently its own voltage drops by more than 1V) will be changed by Bluetooth remote control to change the setting state, such as switching to different ranges or displaying different measured physical quantity units, etc.

    Schematic PCB

  • easySwitchBox: Remote LoRa® wall switch powered by coin cell battery and Arduino IDE

    easySwitchBox does one simple thing - it sends an on/off signal to any relay, actuator or other item. It can be used to trigger any event wirelessly and over long distances (even up to several kilometers using LoRa®). Programming is easy using the Arduino IDE, and communication is protected by a certified chip. easySwitchBox not only makes your projects more efficient, but also looks more professional.

    Schematic PCB

  • WiCAN: Open Source ESP32-C3 CAN Adapter Supporting USB, Wi-Fi and BLE

    WiCAN is a powerful CAN adapter based on ESP32-C3 that can be used for car hacking and general CAN bus development. It is available in two form factors: OBD-II and standard USB-CAN. The original firmware can interact directly with RealDash using Wi-Fi or BLE, which allows you to create custom dashboards with beautiful graphics. It is available for Android, iOS, and Windows 10. WiCAN connects to your existing Wi-Fi network and any device on that network, and it allows you to configure Wi-Fi and CAN settings through a built-in web interface. Both versions have a power saving mode that detects when the voltage drops below 13 V or other preset values. When this power saving mode is enabled, WiCAN is able to enter sleep mode, reducing the current consumption to less than 1 mA.

    Schematic PCB

  • FossaSat-1 - the smallest satellite ever launched into space

    FossaSat-1 uses cheap LoRa modules to provide free and open source IoT communications around the world, allowing students to communicate with satellites for less than 20 euros.

    Schematic PCB

  • ESPboy: Sub 1GHz open source radio scanner based on CC1101

    The ESPboy CC1101 chip module allows you to detect Sub1Ghz signals (300-348MHz, 387-464MHz, 779-928MHz). Scan, decode, store to open garage doors, obstacles, IoT sensors...

    Schematic PCB

  • Open source 12-lead portable electrocardiograph

    This open source has a complete host computer, slave computer and schematic diagram, as well as a detailed design paper.

    Schematic PCB

  • small home weather station

    It consists of two parts: the outdoor end (Outdoor) and the indoor end (Indoor). The Outdoor end can be placed outside the window to monitor real-time outdoor temperature, humidity, air pressure, illumination and other information. The Indoor is placed indoors to receive weather data and display it.

    Schematic PCB

  • Home smart lighting control and indoor environment monitoring system 

    The project implementation uses RSL10 and external mechanical control structure to complete wireless control of traditional switches.

    Schematic PCB

  • OM2385/SF001 - OL2385 Wireless sub-GHz Transceiver SIGFOX Development Kit with KL43Z

    NXP's OM2385/SF001 development kit for SIGFOX applications, including OL2385 and Kinetis KL43 series MCUs for host applications

    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

  • Bidirectional 400V-12V DC/DC converter reference design

    The Bidirectional 400V-12V DC/DC Converter Reference Design implements an isolated bidirectional DC/DC converter based on a microcontroller. The phase-shifted full bridge (PSFB) with synchronous rectification controls the power flow from the 400V bus/battery to the 12V battery in buck mode, while the push-pull stage controls the reverse power flow from the low-voltage battery to the high-voltage bus/battery in boost mode. . This implementation uses a Texas Instruments (TI) 32-bit microcontroller TMS320F28035 on the low-voltage side to achieve closed-loop control of bidirectional power flow. This digital controller system implements advanced control strategies to optimally control power stages under varying conditions and provides system-level intelligence for safe and seamless transitions between operating and PWM switching modes.

    Schematic PCB

  • CLRC663 + and QN902x NFC-Bluetooth ® Low Energy Solutions for Consumer Electronics Applications

    Bluetooth ® Low Energy-NFC-v2.0 is an NFC expansion board for QN9020DK and an extensible QN9020 application development platform. This NFC expansion board is based on CLRC663+, a high-performance multi-protocol NFC front-end.

  • Ultra-small RGB LED animation solution reference design for battery-operated applications

    This reference design is a 2cm x 2cm RGB LED animation solution for battery powered applications using the LP5523 and MSP430FR2111 devices. The LP5523 device is an LED driver with a programmable control engine in a DSBGA package. The LP5523 provides realistic lighting patterns for applications that must fit on extremely small PCBs. The design demonstrates full functionality while using limited MCU resources.

    Schematic PCB

  • Software and hardware open source portable monitor CatSniffer (schematic diagram, PCB, source code, etc.)

    This board is a Swiss Army Knife for IoT security researchers, developers, and enthusiasts. The board can be used with different types of software, including third-party sniffers such as SmartRF Packet Sniffer, Sniffle, zigbee2mqtt, Z-Stack-firmware, Ubiqua Protocol Analyzer, our custom firmware, or you can even Specific software requires writing your own software.

    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

  • PYPRCA: python programmable open source calculator based on Raspberry Pi PICO, developed using circuitpython

    Pocket calculator style general purpose programmable device (computer) ideal for learning programming and improving building/soldering skills.

    Schematic PCB

  • IoT ECG monitoring based on ESP32

    Alex Newton released an IoT electrocardiogram monitoring (ECG) tutorial based on ESP32, demonstrating that remote cardiac monitoring can be carried out no matter how far the distance is between the doctor and the patient.

    Schematic PCB

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