255 W, 80PLUS® Silver Certified ATX Power Supply GreenPoint® Reference Design

OPen Book: a fully open source e-book that supports all languages ​​and breaks down working principles (schematics, PCB, source code, etc.)

Open Book is an open hardware device for reading books in all languages ​​of the world. It includes a large screen and navigation buttons, as well as audio options for accessibility and ports to expand its functionality. Its fine screen printing aims to demystify Open Book's own design, breaking down for curious readers how the book works and how they can create one for themselves.

Schematic PCB

MAXREFDES171#: IO-Link distance sensor

The MAXREFDES171# is a complete, high-accuracy, IO-Link distance sensor reference design that provides accurate ranging up to 4m. Built in an industrial form factor, the design makes use of a commercially available time-of-flight (ToF), laser-ranging sensor.

Schematic PCB

MAXREFDES37#: IO-LINK four-channel servo driver

Maxim Integrated's MAXREFDES37# reference design is a fully IO-Link ver1.1 compliant, four-channel servo driver using a TMG TE IO-Link device stack. The system contains an IO-Link device transceiver, a low-power RL78 processor, and efficient industrial step-down DC-DC converter. The MAXREFDES37# comes preprogrammed and ready to connect with any compliant IO-Link master such as the MAXREFDES79# IO-Link master with a simple-to-use graphical user interface (GUI) program. Design files including schematic, PCB, BOM, and IODD firmware files are available for download.

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

MAXREFDES42#: IO-LINK RTD temperature sensor

Maxim Integrated's MAXREFDES42# reference design is a low-power, IO-Link RTD temperature sensor compliant with IEC 61131-9. The system contains an RTD-to-digital converter, an IO-Link transceiver, an efficient step-down converter, and a display. The MAXREFDES42# comes preprogrammed and ready to connect with a version 1.1-compliant IO-Link master. Design files including the schematic, PCB, BOM, and firmware source code are available for download.

Schematic PCB

2-phase unipolar stepper motor driver IC——TB67S142NG

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

Wireless security camera based on ESP32

Have you ever wanted to install a security camera in your home, garden or office? Although commercial Wi-Fi security cameras on the market are not expensive, if you want to install multiple ones in different scenes or rooms, it will cost a lot of money. Young engineer Max can develop a wireless security camera based on Espressif's ESP32 chip with only $15.

Schematic PCB

Based on IFX007T BLDC motor and DC brush motor driver

This BLDC motor driver board is capable of driving one BLDC motor, or one or two bidirectional DC motors (H-bridge configuration, cascaded to support a second motor) or up to three unidirectional DC motors (half-bridge configuration).

Schematic PCB

Line voltage frequency monitor

The author noticed that the AC line frequency changes in spans of 0.4 Hz and periods of several minutes, so I wanted to examine long-term changes in AC line frequency and voltage. This is a project to build a line voltage frequency monitor. It is not a complete instrument but a simple measurement adapter designed to be embedded in some measurement system with a PC or microcontroller.

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

MAXREFDES79#: 4-port IO-LINK host

Maxim Integrated's MAXREFDES79# reference design is a fully compliant IO-Link version 1.1, 4-port IO-Link Master using a TEConcept software stack. The system contains four IO-Link master transceivers, a standard ARM® Cortex® M3 processor, and efficient industrial step-down DC-DC converters. The MAXREFDES79# comes preprogrammed and ready to connect with any compliant IO-Link device using a simple-to-use graphical user interface (GUI) program. Design files including schematic, PCB, BOM, GUI software, and compliance report are available for download.

Schematic PCB

MAXREFDES103#: Health Sensor Wristband

The MAXREFDES103# is a wrist-worn wearable form factor that demonstrates the high sensitivity and algorithm processing functions for health-sensing applications. This health sensor band platform includes an enclosure and a biometric sensor hub with an embedded heart-rate, SpO₂ algorithm (the MAX32664C) which processes PPG signals from the analog-front-end (AFE) sensor (the MAX86141). Algorithm output and raw data can be streamed through Bluetooth^® technology to an Android® app or PC GUI for demonstration, evaluation, and customized development.

Schematic PCB

Wireless charger

This is a reference design for a wireless charger. The working principle is: power transmission between objects through electromagnetic induction. A fully analog RL78/G11 microcontroller, ISL28006 current sense amplifier and HIP2106A MOSFET driver are used.

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

MAXREFDES43#: I2C SHA-256 security authentication design

The MAXREFDES43# subsystem provides an I2C-based reference design for securing Xilinx FPGAs to protect IP and prevent attached peripheral counterfeiting. The system implements an I2C SHA-256 challenge-response between the FPGA and a DS28C22 secure authenticator with on-board memory. Boards for purchase, hardware, and firmware design files provide complete system information for rapid prototyping and development.

Schematic PCB

MCU-based Alexa voice service solution

The i.MX RT AVS solution based on Alexa Built-in MCU is a turnkey hardware and single-source software solution for adding voice control with Alexa.

Schematic PCB