On-board charger (OBC) LLC converter

Chhavi: ESP32 based fingerprint sensor with optional NFC (source code, etc.)

Chhavi is a tiny, wireless, touch capacitive fingerprint sensor with high-end security features, support for ultra-low power operation and optional NFC connectivity. Its open source firmware is fully compatible with the Arduino IDE. Chhavi is powered by ESP32 and features an FPC BM-Lite fingerprint sensor by Fingerprints, giving you and your projects access to the excellent biometric hardware found in many smartphones. Unlike optical fingerprint sensors that are large and power-hungry, this capacitive biometric sensor is small, accurate, and energy-efficient. During our design process, we determined that NFC communication would be a powerful feature for many of the same applications that might require a high-quality fingerprint sensor, but we could not find a major ESP32-driven NFC controller. So we built one into Chhavi as an optional feature. We've also added an optional battery to simplify installation and facilitate mobile deployment. The result is a tiny device with a cutting-edge fingerprint reader, Wi-Fi and Bluetooth capabilities, as well as support for NFC and battery power when needed.

Schematic PCB

MRB-KW0x: Modular reference design board for Kinetis KW0x series MCUs

The NXP MRB-KW0x is a modular reference board for MKW01Z128CHN platform, part of the Kinetis W series of MCUs.

Schematic PCB

NTAG I ² C + Explorer Kit with NFC Reader

The NTAG I²C+ Explorer Kit is an all-in-one demonstration/development resource for NFC connected tags. Additional NFC readers included.

Schematic PCB

2018 Electronic Competition Question F-Wireless Microphone Amplification System (Xidian University)

Schematic PCB

3.3 kW APM OBC Demonstration Board Test Report

SMD Inductor Based Antenna Reference Board for M24LR04E-R

SMD - Inductor based antenna reference board for M24LR04E-R

Schematic PCB

FL7740 and FL7760 with Bluetooth wireless dimming control (25 W)

ESPFLIX: Free streaming service based on ESP32

Well-known maker Rossum shows us how to build an open source set-top box and connect it to an ESP32-based video streaming service.

Schematic PCB

Advantech's EWM-W306: NXP 88W8997 M.2 1216

PNEV512B: PN512 card reader circuit board

PN512 card reader circuit board

Schematic PCB

2018 Electronic Competition Question F-Wireless Microphone Amplification System (Harbin Engineering University)

Schematic PCB

MC9S08RG60 Demonstration Board

Schematic PCB

RDR-802 - 60W USB PD 3.0 with 3.3 V-21 V PPS power supply, using InnoSwitch3-Pro and Weltrend WT6635P controller

60 W USB PD 3.0 with PPS charger (5 V/3 A; 9 V/3 A; 15 V/3 A; 20 V/3 A; 3.3 V-21 V PPS outputs) using InnoSwitch3-Pro (INN3379C-H302) and Weltrend (WT6635P) USB PD controller

Schematic PCB

2.4GHz ZigBee IEEE 802.15.4 based radio transceiver solution (RFMD RF6505/6575/6555)

The reference design demonstrates a complete 2.4GHz ZigBee IEEE 802.15.4 based compliant radio transceiver solutions and conform to FCC CFR47 part 15. The wireless SoC reference design series (RFMDs RF6505/6575/6555) are developed by the partnership between RFMD and Corporation. The RFMD device increases transmit power and sensitivity.

Schematic PCB

Zhihuijun open source super mini smart NFC card (schematic diagram, PCB, source code, etc.)

With electronic ink screen, can simulate various IC cards

Schematic PCB

Offline LED Driver for ENERGYSTAR® Residential LED Luminaire Applications - GreenPoint® Reference Design

5 W CCCV AC-DC Adapter GreenPoint® Reference Design

RHYTHM SA3229 Low-Cost Behind-the-Ear (BTE) Hearing Aid Reference Design

JN5169XK020: ZigBee lighting/sensor node expansion board kit