• Open Source 150M Oscilloscope Differential Probe

    The PD150 is a compact 150MHz differential oscilloscope probe for engineers on a budget and advanced hobbyists. It has advanced features such as automatic DC offset voltage zeroing and low-frequency common-mode rejection tuning. It will also provide complete documentation in the spirit of old-school "anchor" test equipment, detailing its working principles in addition to typical instructions and specifications.

    Schematic PCB

  • FRDM-TOUCH: Touch module for Freedom circuit boards

    FRDM-TOUCH is a touch module for FRDM-KE15Z

  • GPSMUX: GPS Multiplexer

    This board and associated firmware can be used to switch between two serial NMEA GPS feeds based on repair status. The resulting feed is transmitted over a third serial line with RS232 levels. This board is designed around the Cypress PSoC CY8C27143. The PCB is designed using KiCAD.

    Schematic PCB

  • CN0254

    16-bit, 250 kSPS, 8-channel single-supply isolated data acquisition system

    Schematic PCB

  • Picoclick-C3: Small WiFi and BLE IoT button for multiple applications

    Picoclick-C3 The name relates to its new processor, the ESP32-C3, a single-core RISC-V 160MHz CPU. Picoclick C3T is a small WiFi and BLE IoT button suitable for a variety of applications. Originally designed for smart homes, Picoclick can also be used as an actuator for IFTTT automation or as an MQTT device. It is based on the single-core ESP32-C3 RISC-V processor, so it has a lot of useful features. The C3T measures just 10.5mm x 18mm.

    Schematic PCB

  • Voice and vision module based on ESP32S3

    Use ESP32S3 to develop a general module with speech recognition and visual recognition functions. It is mainly used for education, science and technology competitions, and creative design of DIY enthusiasts. The interface and functions are compatible with OpenMV, and its IDE can be used as development and debugging software. Most of the overall hardware design is compatible with ESP32S-EYE, so with a little adjustment of the interface definition, it can be compatible with ESP-WHO. ESP-WHO provides examples such as face detection, face recognition, cat face detection and gesture recognition, thus making this software The module is very playable.

    Schematic PCB

  • CN0229

    4-channel, flexible, configurable, voltage and current output circuit for I/O card and PLC applications

    Schematic PCB

  • pmod-quad-7segment: PMOD of four 7-segment digital tubes

    A PMOD with a quad 7-segment display connected to a pair of 74hc595 shift registers. There are 3 tactile buttons.

    Schematic PCB

  • Surface potentiometer: detects how much static electricity the human body carries

    During the dry season we often get electrocuted by metal objects, especially door handles. This is due to the charged static electricity in the human body. Any object can be charged, and often objects have electrical potentials of several thousand volts or more. Static electricity often causes malfunction or damage to electronic equipment. I've always wanted to know how much static electricity is carried in an object or human body, so I made a surface potentiometer to measure the potential of a charged object.

    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

  • Reading pen

    Use a reading pen with a Renesas Electronics RL78/G14 microcontroller, ISL80505 single-output low-dropout linear regulator (LDO), and ISL6294 high-input voltage charger to read the code printed on the paper and play the corresponding Audio.

  • OM13790 Host and Dock: USB Type-C Shield Board Gen 2 with DisplayPort Alt Mode

    NXP is launching a Generation 2 USB Type-C Shield with display port alt mode support! The NXP Generation 2 USB Type-C shield works with the MCUXpresso SDK and USB Power Delivery stack to allow you to connect USB Type-C Connectors to select Kinetis®, LPC and i.MX RT development platforms.

    Schematic PCB

  • 5-channel (3 +V and 2 -V) hot-swap reference design

    This article presents a five-channel hot-swap circuit that handles both positive and negative input voltages with sequential turn-on. The unique configuration allows two negative-voltage channels not protected by circuit breakers, in addition to three positive-voltage channels, to be controlled by a single MAX5927A positive-voltage hot-swap controller. The included test data verifies that the circuit meets the described load and power-sequencing requirements of the five channels.

  • Self-soldering PCB board design that supports reflow soldering (including PCB, schematic diagram, source code, etc.)

    After the user manually solders a PCB board, this board becomes the reflow controller, and then this board can be used to control other boards for reflow soldering, because this board has been specially designed to open a heating layer.

    Schematic PCB

  • Open source plankton monitoring and analysis equipment PlanktoScope

    Plankton help remediate 30-50% of the world's carbon dioxide and provide the foundation for the global food chain, making up the world's largest daily movement of biomass as it travels across the ocean. The shapes, colors, and movements of these billions of creatures are as vast as the oceans that sustain them. Understanding plankton is crucial to understanding the world around us and our impact on it.

    One obstacle to this type of research is the sheer size of the area to be explored, as well as limited resources for research fleets and specialized equipment. By developing a method to scale up high-quality visual exploration and documentation, we can greatly increase our understanding of the complex web of life around us, and how we in turn influence it.

    Schematic PCB

  • Wi-Fi smart power strip

    The Wi-Fi smart power strip using RL78/G13 microcontroller and ISL85003 regulator can remotely control the opening and closing of each power socket through Wi-Fi.

  • Computer vision tool GluonCV: recognition, detection, segmentation, pose

    CluonCV provides an implementation of state-of-the-art (SOTA) deep learning models in computer vision. It is designed for engineers, researchers and students to quickly prototype products and research ideas based on these models.

    Schematic PCB

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