Digispark Attiny85: Program Attiny85

Introduction: The smallest plug-in digispark on the entire network

Schematic PCB

Reed switch + vibration switch T12 bracket

Introduction: T12 handle bracket with integrated reed switch and vibration switch

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Youlian 67 hot plug-K375S with F zone (small incisors support aluminum lumps)

Introduction: Youlian 67-K375S with F area (small incisors support aluminum lumps) 3157 analog switch simulates F area

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Youlian K375s 17-key keypad

Introduction: Youlian K375s small keyboard

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Youlian HHKB-K375S with F area and dial code

Introduction: Youlian HHKB-K375S with F zone 3157 analog switch simulates 2-layer buttons

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Mechanical keyboard various positioning plates GH60 64 84 HHKB satellite axis balance bar

Introduction: GH60 Positioning Plate File

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Brushless fascia gun

Fascia gun is mainly used to relax muscles after exercise. Mainly involves brushless motor drive and FOC algorithm parameter debugging.

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Electronic pointer (with mouse control)

Introduction: Electronic pointer (with mouse control)

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MAX3051EKA dual-channel CAN STM32F4 controller

Introduction: This project is a solution verification board design used to verify the CAN chip/MAX3051EKA of Lichuang Mall.

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Esp32-PICO-Watch

Introduction: A watch made with ESP32 and OLED screen, which is highly customizable

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8002 small power amplifier

Introduction: 2822 small power amplifier

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R2sHat_OLED: NanoPiR2s module, including display, buttons, always and storage, etc.

Introduction: NanoPiR2s module, including display, button, always and storage functions.

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Arduboy handheld game console

Introduction: An Arduboy-based game console (http://arduboy.cc) can store a variety of games. It uses dome chips as buttons. The buttons are crisp and feel good.

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TWS charging case motherboard

Introduction: TWS Bluetooth headset charging compartment motherboard solution

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RFID business card verification solution

Introduction: 2020 Jishou University Electronic Studio Recommended Training Work 1---PCB Business Card

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The most beggar 17-key + touch strip mechanical keyboard

Introduction: After one year, the sequel to the most beggar mechanical keyboard: the most beggar small keyboard, makes full use of the touch key peripherals that come with the CH551G, combines my previous open source touch slip ring DEMO, and uses the touch bar for multimedia control ( And the touch strip does not require additional components, so you can definitely afford the cost of DIY)

Schematic PCB

The most beggar 61+3 key mechanical keyboard (appearance)

Introduction: I have the keyboard, but I am missing a shell. I happen to plan to use fiberglass board to make it. There is no circuit on it anyway, so why not... (Catch the shrimp~)

Schematic PCB

ws2812 group 12*12 dot matrix

Introduction: It can display Chinese characters with 12*12 resolution. It can be cascaded to achieve the same high resolution. It can be used to make clocks.

Schematic PCB

The most beggar 61+3 key mechanical keyboard (with principle explanation)

Introduction: Using the low-priced Qinheng CH551 (the beggar among the beggars in the CH55X family) without ADC and 0.75+10 memory, I challenged myself to make the lowest-cost 61-key mechanical keyboard without adding io expansion.

Schematic PCB

LM2596 buck-boost circuit (with simulation diagram)

Introduction: LM2596 is commonly used as a step-down device. Have you ever heard of it used as a step-down device? (Not the negative voltage output kind) The test chip is lm2596 and a pin-compatible chip. Here we choose AP1501 (material number: C360640) for testing.

Schematic PCB