Portable strip soldering station based on Arduino platform Atmege328p

Open sourced by Bilibili up, DCDC-LDO secondary step-down power supply, tc1047 for cold-end compensation, built-in curve fitting calibration function, and supports 65W gallium nitride charger.

Schematic PCB

Super mini & low-cost Linux development board based on Allwinner F1C200s (produced by Zhihuijun)

The cost of the board should be less than 50RMB, and it provides a lot of information, which is very suitable for novices to use as a development board to learn Linux.

Schematic PCB

Open source C-mount lens USB industrial camera (source code, PCB, design and production instructions, etc.)

There are three boards in total, USB, FPGA and Sensor board. The FPGA board features a Lattice Crosslink NX LIFCL-40 and the required power regulator, and the USB board features a CYUSB3014 USB 3.0 SuperSpeed ​​controller.

Schematic PCB

Blimpduino-2 - open source blimp (source code and schematics, etc.)

Bllimpduino 2 is a very low cost open source autonomous airship. It consists of Arduino M0 airship controller board and on-board WIFI and laser sensors. Two vector differential thrusters and one lift thruster. The design is simple, yet exciting.

Schematic PCB

Open source practical current and magnetic field probe little-bee

Little Bee is an affordable, high-performance current probe and magnetic field probe that allows you to debug and analyze electronic devices more efficiently.

Schematic PCB

Arduino dual combination: based on iMX8 and STM32H747 development boards

Portenta X8 is a powerful industrial-grade SOM with a pre-installed Linux operating system onboard and can run device-independent software thanks to its modular container architecture. Securely perform OS/application OTA updates with onboard Wi-Fi/Bluetooth® Low Energy connectivity. It is basically two industrial products combined into one, with a power of no less than 9 cores. Utilize the Arduino environment to perform real-time tasks, while Linux handles high-performance processing. Portenta X8 features NXP® i.MX 8M Mini Cortex®-A53 quad-core up to 1.8GHz per core + 1x Cortex®-M4 up to 400MHz, and STMicroelectronics STM32H747 dual-core Cortex®-M7 up to 480Mhz +M4 32-bit Arm® MCU, up to 240MHz.

Schematic PCB

Ultrasonic standing wave axial suspension moving device

With the in-depth research of ultrasonic levitation technology by domestic and foreign scholars, ultrasonic levitation devices have developed from expensive horns and other equipment to structures composed of general-purpose commercial ultrasonic transducers. Combined with 3D model printing technology, any scientific researcher and Electronics enthusiasts can use these components to make ultrasonic levitation devices to facilitate related acoustic research. This technology was published in AIP Publishing by Asier Marzo et al. Based on its model, this design changes the main control MCU, uses the timer inside the MCU to generate accurate PWM waves, and improves the software so that the ultrasonic device can move the suspension stably during the axial suspension movement. Small objects in multiple nodes.

Schematic PCB

Open source development tool USB-Cereal

USB-Cereal is a powerful, fully open source development tool that simplifies testing, development, debugging and manufacturing of devices using USB-C. Using the extended capabilities of USB-C, this unique hardware saves time and effort by simplifying debugging and factory log capture, as well as firmware update procedures.

Schematic PCB

Pixblasters Video LED Controller: Combine with LED strips to create a huge display that acts as a regular video monitor (PCB, schematic, demo source code)

Huge, shiny, beautiful video displays with thousands of LEDs have always been out of reach of enthusiasts and small business owners due to their high cost and complexity. Pixblasters MS1 changes all that.

Schematic PCB

REP021: Front-end devices for 2.5GHz Globalstar and IS-95

This reference design (RD) is for a dual-band CDMA front-end IC that uses a PCS-band signal path for 2.5GHz LEO satellite channel and a cellular-band signal path for GlobalStar IS-95 CDMA applications. The MAX2323 LNA plus mixer for dual-band CDMA handsets is featured.

Schematic PCB

FRDM-KW36: Freedom Development Kit for Kinetis ^{® KW36/35 MCUs}

FRDM-KW36 is a development kit for the KW35/36 MCU that provides connectivity for Bluetooth Low Energy (BLE) v5. KW36 integrates CAN/CAN-FD connection.

Schematic PCB

Fully open source reflow soldering Reflow-Controller: based on ESP32-S2, magic oven modification

Reflow-Controller is designed to control different types of reflow ovens, hot plates, etc. It's based on the ESP32-S2, so it can be programmed to work with WiFi applications, but it also has an onboard OLED display and three buttons for use as a standalone solution.

Schematic PCB

REP017: Dual-band three-mode IC suitable for both CDMA and AMPS with an intermediate frequency of 183MHz

Reference design (RD) is a dual-band, triple-mode CDMA front-end to a receiver whose frequency plan requires digital and AMPS analog IFs to be at 183.6MHz. RD uses the MAX2338, a low-noise amplifier (LNA) with mixer, that is useful for TDMA, GSM, EDGE, and WCDMA applications.

Schematic PCB

OM13536: SA639DH Demonstration Board

ALCATRAZ (MAXREFDES34#): SHA-256 security authentication design

The Alcatraz (MAXREFDES34#) subsystem provides a reference design for securing Xilinx FPGAs to protect IP and prevent attached peripheral counterfeiting. The system implements a SHA-256 challenge-response between the FPGA and a DS28E15 secure authenticator. Boards for purchase, hardware, and firmware design files provide complete system information for rapid prototyping and development.

Schematic PCB

Plant Bot: an open source project for caring for potted plants based on ESP32

Plant Bot is an open source project based on ESP32 that allows a single PCB to perform the functions of detecting humidity, watering, providing lighting, and controlling and communicating with the user via WiFi/BLE.

Schematic PCB

REP003: Cellular Front-End ICs in Automotive Applications

This reference design (RD) is for a dual-band CDMA front-end IC for use in automotive applications. The application circuit uses the MAX2323 low-noise amplifier (LNA) with mixer at temperatures up to 110°C. The device is also useful for TDMA, GSM, EDGE, and WCDMA applications. Schematics, bill of materials (BOM), and performance measurements are shown.

Schematic PCB

REP018: Dual-band dual-mode FE IC operating at universal 183.6MHz IF

Reference design (RD) is a dual-band, triple-mode CDMA front-end IC in a receiver with all 183MHz IFs for processing cellular CDMA. The RD uses the MAX2323, a low-noise amplifier (LNA) with mixer, that is useful for TDMA, GSM, EDGE, and WCDMA applications.

Schematic PCB

REP016: Japanese 110MHz IF dual-band cellular CDMA RF front-end

This reference design (RD) is for a dual-band, dual-mode CDMA front-end for Japanese cellular CDMA at 110MHz IF. The RD uses a low-noise amplifier (LNA) with mixer, the MAX2325, that is also useful for TDMA, GSM, and EDGE applications. Schematics and bill of materials are shown.

Schematic PCB

PETALUMA (MAXREFDES30#): 8-channel simultaneous sampling analog front end

The Petaluma (MAXREFDES30#) subsystem reference design is a cost optimized, high-speed and high-accuracy analog measurement solution for three-phase power monitoring applications. Hardware, firmware, design files, and lab measurements provide complete system information for rapid prototyping and development.

Schematic PCB