CN0259

High-performance 65 MHz bandwidth quad-channel IF receiver with anti-aliasing filter and 184.32 MSPS sampling rate

Schematic PCB

XDPL8105 40W Reference Design

The XDPL8105 40W reference design is a digital ground configured LED driver with a universal input of 90-305 V AC, a wide output load range of 16-45VDC and isolated 0-10V dimming based on a CDM10V dimming IC. The power stage uses IPD80R1K4CE, a 900mOhm CoolMOS™ CE power MOSFET. 

Open source power meter: with power supply function, dedicated to IoT power consumption measurement

The biggest feature of testing the power consumption of IoT devices is the high dynamic range, a few uA in the sleep state and hundreds of mA in the transmitting state, and it supports dynamic switching of the measurement range. The open source power meter ZS1100A has a dynamic measurement range of 1uA to 1.5A, a resolution of 100nA, and an accuracy of 1% ± 200 nA, which is very good.

Schematic PCB

Multifunctional CNC power supply design based on STM32 (schematic diagram, PCB, program source code, etc.)

Multifunctional CNC power supply design based on STM32 (schematic diagram, PCB, program source code, etc.).

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20MHz handheld dual trace pocket oscilloscope based on TMS320F28033

With TMS320F28033 as the core, it is composed of signal amplification circuit, signal acquisition circuit, data storage and processing module, system control and display module and other parts.

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Dual channel signal generator, manual welding

High reference value, the 50-year-old work of FatFS author ChaN

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CN0260

Oversampled SAR ADC using PGA achieves over 125 dB dynamic range

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CN0217

High-precision impedance measurement with 12-bit impedance converter

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RDR-641 - 40 W variable output (3 V to 8 V, 5 A; 8 V – 20 V constant power) power supply using InnoSwitch3-Pro and Microchip PIC16F18325 microcontroller

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Three-band infrared flame detector

When a substance burns, it produces smoke and heat, and also produces visible or invisible light radiation that is not found in the atmosphere. Flame detector, also known as photosensitive fire detector, is a fire detector used to respond to the light characteristics of fire, that is, to detect the light intensity of flame burning and the flicker frequency of flame. Infrared flame detector is a flame detector that is sensitive to the longer wavelength infrared light radiation in the flame. According to the different detection bands, it is divided into single band, dual band and three band.

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An open source multimeter suitable for DIY

This project started with STM32F1 and now it uses STM32F3.

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LibreTimeBase: Rubidium clock control board

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2021 Undergraduate Electronic Design Competition J Title National First Work (Periodic Signal Waveform Identification and Parameter Measurement Device)

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2020 E-Contest Question E-Amplifier Nonlinear Distortion Research Device (Dalian University of Technology)

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Intelligent atmospheric corrosion monitor circuit schematic + PCB source file

This intelligent atmospheric environment and corrosive monitoring platform integrates hardware, software, and network. With the stable performance IACM-321 platform system as the core, it realizes multi-level dynamic networking and remote status monitoring. It can be monitored in the monitoring/operation and maintenance center. The front-end system provides centralized monitoring and unified management, and uses customized intelligent terminals to achieve mobile monitoring. Convenient Click connect sensor interface, easy to install on smart terminals.

Schematic PCB

Bluetooth protocol analysis tool nRF52840 MDK USB Dongle

The nRF52840 MDK USB Dongle is a small, low-cost development platform implemented by the nRF52840 multi-protocol SoC in a convenient USB Dongle form factor.

Schematic PCB

CN0148

Layout considerations for a scalable multi-channel simultaneous sampling data acquisition system (DAS) based on the 16-bit 8-channel DAS AD7606

Schematic PCB

Spark Analyzer: open source wireless USB PD power supply with power consumption analysis

Spark Analyzer is fully compatible with USB-C PD, ensuring compatibility with a wide range of devices and applications. Precisely control voltage levels to meet your project needs. Switches to 5V, 9V, 15V and 20V to accurately measure the current draw of your project. Understand your power needs and optimize accordingly.

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2019 Electric Competition Question C (Line Load and Fault Detection Device) National First Prize Design Report

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CN0189

Tilt measurements using dual-axis accelerometers

Schematic PCB