900MHz full-duplex wireless transmitter reference design

This reference design covers the design of a transmitter inside a 900MHz full-duplex radio using the MAX2902 single-chip transmitter. The MAX2902 is designed for use in the 868MHz to 915MHz frequency band, and complies with FCC CFR47 part 15.247 902MHz to 928MHz ISM band specifications. The reference design is capable of delivering more than +19dBm with V _CC = 2.9V and I _CC = 170mA, and +20dBm with V _CC = 3.3V and I _CC = 190mA, while meeting 14dB of CNR (1.22Mbps BPSK) at 10:1 VSWR (all angles).

TWR-K21D50M: Kinetis K21 50 MHz MCU Tower System Module

The TWR-K21D50M module is a development board for Kinetis K11, K12, K21 and K22 50 MHz 32-bit ARM Cortex-M4 MCUs.

Schematic PCB

OM13534: SA605DK Evaluation Demonstration Board

Onboard DC-DC USB PD controller STUSB4710 evaluation board

STUSB4710 Evaluation Board USB PD Controller with Onboard DC-DC

Schematic PCB

IEEE 802.3bt compliant Power over Ethernet (PoE) interface reference design

Power over Ethernet (PoE) - IEEE 802.3bt compliant interface reference design

Schematic PCB

DVB-T reference design based on MAX3580

Reference design of Epson multimeter microcontroller S1C17M02/M03

Can measure DC/AC voltage, DC/AC current, resistance, inductance, capacitance, diode, frequency. Built-in 16bit ADC, digital filter, RMS effective value circuit and peak hold circuit. Multimeter control unit integrated with microcontroller, officially launched reference design kit, powered by button battery, including schematic diagram.

Schematic PCB

CN0175

Low-cost, 8-channel, simultaneous sampling data acquisition system with 84 dB SNR and excellent channel-to-channel matching

Schematic PCB

CN0285

Wideband Low Error Vector Magnitude (EVM) Direct Conversion Transmitter

Schematic PCB

Single-phase electricity meter with Rogowski coil sensor based on STPM01 and STM8L152C6

Single-phase energy meter based on STPM01 and STM8L152C6 with Rogowski coil sensor

Schematic PCB

Open source lithium battery management board, charging 5V2A, discharging 5V/1.52A or 12V/0.76A

This DIY LiPo super charger can charge a single LiPo battery and protect it from overvoltage, overload and short circuit. In addition, it can boost the battery voltage to 5 V or 12 V. The boosted output voltage is protected by an "eFuse" IC with a maximum output current of 1.52 A at 5 V and 0.76 A at 12 V. The charger part of the circuit requires a +5V power supply, which can be connected via USB-C, or simply solder two wires to pads on the PCB. Additionally, other connections can be soldered to pads on the PCB or use individual pin headers.

Schematic PCB

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

Schematic PCB

CN0197

Li-ion battery pack monitor with integrated signal and power isolation

Schematic PCB

Wind turbine tower disaster early warning system

This project uses the LSM6DSOX+STEVAL-MKI109V3 mode for preliminary sensor learning and research, mainly from training the acceleration sensor to detect vibration and recording vibration waveforms, training the gyroscope sensor to detect the vibration direction and offset, and recording the waveform for analysis; combined with the acceleration sensor and the action data of the gyroscope sensor can determine the vibration intensity and direction of the wind turbine tower under various working conditions; in practical applications, the LSM6DSOX sensor is combined with the low-power chip STM32L010RBT6 chip, and the main control board on the local side leads to an alarm relay. The outlet is used for alarm output on the wind turbine tower side. It is connected to the wind turbine scada system through 485 serial port communication to upload the recorded data on the local side to provide real-time feedback on the working status of the wind turbine tower. It can be used to analyze the vibration reverse and wind turbine tower vibration. Swing direction recording can also record and analyze the natural frequency of the wind turbine tower under normal conditions and the natural frequency during faults. The multi-faceted data forms a wind turbine tower disaster warning system that can be sensed in advance;

Schematic PCB

Smart Meter - AMI 2.0

Nuvoton smart meter solution uses NuMicro® M2351/M2354 microcontroller based on Armv8-M TrustZone® architecture. By integrating in-house security technology, the solution provides the infrastructure for Advanced Meter Infrastructure (AMI), including device identification, communications security, remote management and secure over-the-air firmware updates (OTA).

CN0159

Universal Serial Bus (USB) Cable Isolator Circuit

Schematic PCB

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

Schematic PCB

170 W AC-DC reference design with input voltage range for e-bike and power tool battery chargers

Schematic PCB

OM13532: SA616BS Evaluation Demonstration Board

Charging and discharging, backup battery reference design based on AVRBC100 two cells/battery packs

A reference design that demonstrates charging and discharging of two batteries/battery packs with a programmable charge voltage up to 40V. It also demonstrates how to design a battery back-up, also known as an uninteruptable power supply, where the charged batteries are used to power the system if the external voltage supply is lost.

Schematic PCB