2.9-inch ink screen driver board (verified)

Introduction: 2.9-inch ink screen driver

Schematic PCB

College Entrance Exam Countdown Timer Accurate to Seconds

Introduction: Paper countdown cards are too cumbersome and require attention and page turning every day. And it is not shocking. It only shows the number of days counted down, but it cannot be specific to the hours, minutes and seconds. Therefore, I designed an electronic countdown timer to replace me in turning the page (doge)

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USB-D to TYPE-C adapter board D port arduino

Introduction: USB-D to TYPE-C adapter board

Schematic PCB

Headlight LED charging control integrated TYPE-C

Introduction: The original circuit of the broken lamp does not have a charging chip and has been tested. If you need to pick it up, please don’t spray it.

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hphphp

Introduction: Cross-thread the finished PCB with ropes or straps, pass a small wooden stick through the bottom hole, and the simple flowerpot is completed.

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ST-LINK V3 MOD adapter board

Introduction: STLINK-V3MOD adapter board

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IV-27 fluorescent tube_L

Introduction: IV-27 Fluorescent Tube_Left Panel

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IV-27 fluorescent tube

Introduction: IV-27 fluorescent tube

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Allwinner D1s isolated serial screen

Introduction: Display based on Allwinner D1s with isolated serial port and isolated power supply

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5870 Timeline Fixed Board v2

Introduction: World Line Top Board

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Nixie tube watch v2

Introduction: 5870 Nixie Tube Watch

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5870 fixed plate 4

Introduction: 5870 fixed plate

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Tuya IoT infrared voice assistant

Introduction: Tuya Smart and Lichuang IoT Practical Camp Project

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Level conversion module

Introduction: Level conversion between 5V and 2.7-3.3V can be achieved. The level conversion chip uses 74LVC4245, which can convert eight levels in the same direction at the same time. Integrated into a small modular circuit board, the level conversion direction can be controlled by a switch and equipped with a 3D housing.

discrete component relay

Introduction: Discrete Component Relays

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#The 7th Lichuang Electric Competition#N32 Ammeter

Introduction: N32 voltage and current meter

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[isd1820]Simple module

Introduction: Module made using isd1820.
It is currently defective because the size of the microphone is too small and the chip amplifier is small, so the sound is not loud.
It would be nice to give it as a small gift to a friend.

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OTG-RedMi

Introduction: Redmi OTG adapter board

WCH Link

Introduction: Try to make WCH Link debugging development tool

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【RA MCU】Mechanical small keyboard

Introduction: Mechanical small keyboard based on Renesas RA2E1 main control chip

Schematic PCB