Energy meter based on Internet of Things

The main modules of this system include measurement and display main control single chip GPRS. Metering uses a serial communication module to provide a serial port to send commands to the metering module for measurement, and the metering module sends back parameters such as voltage, current, and electric energy. GD32F350 receives and processes the display, stores it in the buffer, and then sends the stored data to Baidu Cloud through the GPRS module through the TFT LCD display. Then obtain the main parameters through the mobile APP.

Schematic PCB

CN0147

Utilizing the ADP150 low-noise LDO regulator to power the ADF4350 PLL and VCO to reduce phase noise

Schematic PCB

CN0145

Build a 4 mA to 20 mA loop-powered temperature monitor using the ADuC7060/ADuC7061 precision analog microcontrollers

Schematic PCB

ERASynth Micro: USB-powered, low-cost, open-source RF signal generator

ERASynth Micro is an open source signal generator with impressive features. Affordable for everyone including builders, hackers, students, amateur radio and SDR users. The ERASynth Micro is powered via the USB port and has an LCD interface for stand-alone use without the need for a computer or phone. It can generate low phase noise RF signals from 12.5 MHz to 6.4 GHz through a dual PLL architecture.

Schematic PCB

Offline High Power Factor Triac Dimmable LED Driver GreenPoint® Reference Design

Pocket oscilloscope source code based on STM32, has been tested and passed

Solemn statement: This is an open source product and can only be used for learning and communication. Commercial use is strictly prohibited, otherwise we will pursue legal liability. Your use of our source code indicates your acceptance of this statement. Qdso is a well-designed pocket oscilloscope with 40M bandwidth, 200M sampling rate and 3.5-inch TFT color screen. The overall design controller uses nios ii soft core; AD9288-100 cross sampling rate reaches 200M real-time sampling, and the display part uses RA8872 that supports double buffering and 2D drawing acceleration to achieve high-speed waveform drawing and display. And we will make the source code and detailed tutorials public for everyone to DIY and learn from.

Schematic PCB

Cynthion: Open Source Multi-Function USB2.0 High-Speed ​​Analyzer

Schematic PCB

Intelligent pressure transmitter based on Analog Devices' ADuC7061

This reference design uses Analog Devices' ADuC7061 as the main control chip (ARM7TDMI core, low power consumption, precision analog microcontroller), and uses the ADuC7061 internal buffer and amplifier to convert the onboard Epcos piezoresistive sensor differential voltage analog signal input into digital The quantity is converted into the corresponding linear analog or digital output through the internal algorithm, thereby achieving accurate measurement of pressure.

Schematic PCB

ASL5115EVBSLAV: MLC ASL5115SHN Evaluation/Development Board

The ASL5115EVBSLAV is a slave evaluation board for the MLC ASL5115SHN that works together with the ASL5115EVBMST to evaluate external lighting systems.

100W Quasi-Resonant (QR) Buck LED Driver

2019 Electronic Competition Question D-Simple Circuit Characteristics Test-Design Plan and Report (National One, Nanjing University)

Schematic PCB

2019 Electric Competition Question C National First Code (Line Load Is Fault Detection Device)

Schematic PCB

STR-NCS32100-GEVK: NCS32100XMNTXG Evaluation Kit

42 W high power factor constant voltage output flyback converter based on ICL8810

REF_ICL8810_LED_42W_PSR This 42 W reference design uses Infineon's high power factor flyback controller ICL8810. The evaluation board is a constant voltage (CV) secondary side regulation (SSR) system designed for use with a constant current (CC) converter for LED lighting applications.

Schematic diagram of the 34401A desktop 6.5-digit multimeter released on the Agilent official website

The schematic is in the appendix at the end of the document.

Schematic PCB

Ultrasonic-based distance meter (including schematic diagram, program source code and related debugging instructions)

Detailed description: Ultrasonic range finder (including schematic diagram, program source code and related debugging instructions, as well as some reference materials, in short, a complete set of information for developing ultrasonic range finders)

Schematic PCB

ChipWhisperer-Husky: Handheld Channel Power Analysis and Fault Injection Tool

ChipWhisperer-Husky is a compact package for experimental side-channel power analysis and fault injection. It follows in the footsteps of our ChipWhisperer-Lite and ChipWhisperer-Pro products and adds new features such as a high-speed logic analyzer for visualizing faults, real-time data streaming for attacking asymmetric algorithms, and additional I/O Extension pins.

Schematic PCB

LED driver with phase-cut dimming, 40 W

RDR-737 - 1.44W non-isolated buck converter using LinkSwitch-TN2 900V

1.44 W Non-Isolated Buck Converter Using LinkSwitch-TN2 900 V (LNK3294G/P)

Schematic PCB

2021 College Student Electronic Design Competition Topic A Outstanding Works Collection (Signal Distortion Measurement Device)

Schematic PCB