UV sensor (UV)

Introduction: UV Intensity Monitoring

Schematic PCB

Relay module

Introduction: One-way optocoupler relay module, active at high level.

Schematic PCB

XT2059 three-function charging board

Introduction: XT2059 charging module, the termination voltage can be set to 3.6V, 4.2V, 4.35V

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Pentium shaver modified to be powered by lithium iron phosphate battery XT2059 charging

Introduction: The old Pentium shaver powered by nickel-cadmium battery is changed to lithium iron phosphate battery, and the charging IC uses XT2059.

Schematic PCB

AA/AAA lithium iron phosphate battery charger

Introduction: Transformed from the silly charger that comes with Feishi nickel-metal hydride battery set

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Logitech wireless mechanical keyboard (switchable F zone)

Introduction: 65 layout Logitech Wireless Mechanical Keyboard

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HLW8032 single-phase electrical measurement development board

Introduction: A power measurement development board based on HLW8032, using Heli’s company’s power meter chip HLW8032

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Tuya Mini Universal Infrared Remote Control

Introduction: Tuya Mini Universal Infrared Remote Control

Schematic PCB

Metal tank bookmark-a standard accessory for men

Introduction: Metal Tank Bookmark, full of metal feel, is a standard accessory for men reading books. The attached Video_0811_1.mp4 is an introduction video.

Schematic PCB

SMT practice PCB business card and tool card

Introduction: The front is a SMD practice board, which contains 120 original components and 264 solder points. It can be practiced up to 3 times. The manual SMD technology has advanced by leaps and bounds. The back is a tool card, including a toolbar, and the silk screen in the middle can be changed to your own LOGO. The PCB size is 9*7.2mm, which is very convenient to carry.

Schematic PCB

Motherboard hardware TPM module-SPI protocol

Introduction: Mainboard uses TPM2.0 module, main control Infineon SLB9670VQ20, SPI protocol

Schematic PCB

Motherboard hardware TPM module

Introduction: Mainboard uses TPM2.0 module, main control Infineon SLB9665TT20

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Simple hearing aid

Introduction: Simple hearing aid based on TDA2320A

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Common ST7571 dot matrix LCD backplane and boost circuit

Introduction: Common ST7571 dot matrix LCD backplane and boost circuit, suitable for 12PIN LCD screens. The complete capacitor boost part adopts the official typical circuit. Backlight power is provided.

Schematic PCB

Solder paste dispenser A

Introduction: This is an electric solder paste dispenser for soldering SMT boards. As a DIYer, you need an electric solder paste dispenser.

Schematic PCB

# Sixth Lichuang Electric Competition #Blue aluminum power amplifier

Introduction: Each channel is designed with 32 5532 patches. Two pieces are needed for stereo sound. The power supply and speaker protection are redesigned and one piece needs to be made. If you happen to have a chassis and a dual 18V ring bull, then, just right...

Schematic PCB

SC8721QFER solution verification board

Introduction: This project is based on Nanxin SC8721QFER solution verification board (C429907) SC8721 high-efficiency synchronous buck-boost converter

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I/O expander chip AW9523BTQR evaluation board

Introduction: This design is a solution evaluation board for the I/O expander chip AW9523BTQR (C148077) from Lichuang Mall.

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LDC1314RGHT solution verification board [tested successfully]

Introduction: This project is a solution verification board design used to verify the LDC1314RGHT (product number C80399) special sensor for Lichuang Mall.

Schematic PCB

88-key mechanical keyboard design based on HT82K629A

Introduction: DIY an 88-key mechanical keyboard using the HT82K629A chip

Schematic PCB