NFC CUID card 4-in-1

Introduction: CUID4 card in one. Can swipe door card and bus card, update 4-speed toggle switch

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Hangzhou Games Mascot PCb Board Pendant

Introduction: The Hangzhou Games mascot pendant needs to be improved. If you are interested, you can help improve it.

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ESP01S power switch has been verified for use.

Introduction: Reproduction of ESP01S electrical switch, costing about 2 yuan

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doraemon nfc cuid

Introduction: Pendant. The CUid card can be swiped and the card has been verified to be used normally. The resistor is a current-limiting resistor. It is optional. The size of the board is 50x44mm. The color is optional. You can choose black and white. Paint it yourself.

Schematic PCB

Bingdundun key chain

Introduction: Bingdundun keychain is a pure pendant. No function.

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Bingdundun can use CUid card

Introduction: Bingdundun can swipe CUid card

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A ns4150b mobile small power amplifier

Introduction: This is the first time a novice made a small amplifier independently. I felt a sense of accomplishment the moment I heard it sound smoothly. To commemorate this, we have taken a small step. The work itself still has many small problems, such as the power supply will stop when cutting off a piece, there is a current sound when charging, etc. I hope I can learn and improve it in the future

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STM32G030F6P6 core board

Introduction: arduino development board completion plan: using arduino+stm32, it costs 3 yuan a piece and includes 15 ios with free shipping. You can basically do any simple project!

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7-key keypad CH552G

Introduction: Qinheng CH552G small keyboard

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STM32 open source four-axis-new version

Introduction: A quadcopter made with reference to Xiaoma Ge’s RoboFly open source quadcopter

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Loli third generation open source eight-channel receiver with SBUS protocol

Introduction: Loli third generation eight-way SBUS receiver

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"Real" condenser microphone circuit board

Introduction: The preamplifier part is the same as the previous project, integrating a polarization circuit, so it supports pure capacitor capacitor capsules, and the highest measured polarization voltage is 80V.

Schematic PCB

T12 Intelligent Constant Temperature Soldering Station V2

Introduction: T12 intelligent constant temperature soldering station V2; STM32F401CBU6 main control; adjustable temperature from 200 to 400°C, 10 seconds to heat up and melt tin, error within 5°C; 1.3-inch OLED digital display, with display transition animation; with automatic sleep and automatic shutdown functions, The time is adjustable.

Schematic PCB

computer performance monitor

Introduction: Computer performance monitor can display CPU and GPU usage, frequency, temperature, memory usage, etc.

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C245 constant temperature soldering station

Introduction: C245 constant temperature soldering station, with extremely fast heating, super temperature recovery, and stable temperature control; the temperature is adjustable from 200 to 450°C, and the temperature rises to tin in 4 seconds; the new UI interface, silky transition animation; supports lifting the sleep stand for heating and putting it down for sleep ;Support temperature calibration; support PID parameter adjustment; support menu automatic return and other functions

Schematic PCB

esp32c3_tmc2209_dcdc

Introduction: Self-made dual-channel stepper motor control program based on esp32-c3 (used to control the lifting and adjusting magnification of the electron microscope assembled by yourself)

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KeyBoard.Juk.Choc.32.Rev.A

Introduction: 32-key little red dot

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KeyBoard.Juk.Mx.32.Rev.A

Introduction: 32-key small keyboard for black people based on QMK integrated small red dot knob encoder

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car hub

Introduction: usb hub

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ESP32_Arduino_UNO_Type-C

Introduction: The ESP32 development board is designed based on the Arduino UNO standard hardware interface and is used to interface with Arduino UNO hardware.

Schematic PCB