esp8266 is awesome (usb development board)

Introduction: This project is a super device based on esp07, with a size of only 1! It comes with a usb-a interface and a ch340e serial port chip. Plug it into the computer usb port, install the driver and you can use it directly. The board has 8 gpio, one 5v And a 3.3 power interface, convenient for development and use.

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[Wrong choice of controller] Arduino is awesome

Introduction: This project is a super USB based on atmega328pb-au! It has high parts density and comes with its own serial port chip. And the special thing is to use pcb as usb

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Handheld speed measuring pen

Introduction: This project is a handheld tachometer based on attiny and infrared tube, using attiny85 microcontroller, SMD infrared tube solution, using lm321 op amp, dual series cr2032 battery power supply and 0.91-inch OLED screen

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20A high current AC/DC current detection module-with tutorial

Introduction: This project uses the ACS712ELCTR-20A-T Hall effect current sensor chip, which has an accuracy of ±1.5% and supports both DC and AC power.

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Two nickel metal hydride battery charger fully charged turning light sharing version

Introduction: Two nickel-metal hydride battery chargers realize automatic charging and turning lights function, simple and practical

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Dual MIC circuit + 4th order 5KHz low-pass filter to eliminate environmental background noise

Introduction: Dual MIC circuit + 4th-order 5KHz low-pass filtering to eliminate environmental background noise. The MIC circuit uses LMC660 equipped with AD623; the 4th-order 5KHz low-pass filter is composed of LMC660;

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Headphone amplifier (12v single power supply to -12V)

Introduction: Use a 12V single power supply to get ±12V for the 5532 headphone amplifier.

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Practical Audio Amplifier

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soft start circuit

Introduction: WKRY ASOLEN

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Mic amplifier V2

Introduction: An electret mic preamp using ne5532

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[Guangxi Normal University Competition] Arbitrary waveform generator

Introduction: This project is an arbitrary waveform generator circuit

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20-segment music rhythm spectrum light

Introduction: 20-segment music rhythm spectrum light

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24V down to 5V adjustable module

Introduction: 111

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[Board verified] LM660-ADC

Introduction: A single power supply ADC based on the LMC660 Rail-to-Rail op amp, and an R-2R weighted resistor network, using direct plug-in components.

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Amplifier board extension power supply

Introduction: Expansion power board for Class-D Amplifier

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Class-D Amplifier

Introduction: Class D power amplifier board suitable for TPA3118, TPA3116, TPA3130

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Voice controlled melody light-plugin_V1.0

Introduction: Voice-activated melody light fully plug-in device CR2032 battery powered

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Touch Switch Model For Livolo

简介：This circuit is a touch switch

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TP4056 Charger Protector Booster

Introduction: TP4056 LiIon Charger Protector Booster SMD

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TP4056 Charger Booster 3A

Introduction: TP4056 LiIon Charger Protector Booster 3A

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