USB voltage and current meter (ESP32+INA226) C port V1.1

Introduction: USB voltage and ammeter based on ESP32-PICO-D4+INA226, using TYPE C male and female connectors; touch button to switch display direction; focus: ultra-thin, simple

Schematic PCB

Simple USB voltage and ammeter (ESP32+INA226)

Introduction: USB voltage and ammeter based on ESP32+INA226, using USB A head, with CC pin, supports PD fast charging; focus: ultra-thin, simple

Schematic PCB

USB-POWER V1.2

Introduction: USB power ammeter based on PD protocol

Schematic PCB

IP5389 fast charging power bank V1.2

Introduction: IP5389 fast-charging power bank adopts a male mold casing on the market and integrates a 0.42-inch OLED display, which can display battery capacity, temperature, and charge and discharge voltage and current.

Schematic PCB

Electronic load meter V1.2

Introduction: Low-power electronic load meter based on ESP32+INA226; supports DC, TYPE C, and 4-wire interface.

Schematic PCB

ATtiny85 Development Board SMD

Introduction: ATtiny85 Development Board SMD

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electronic wooden fish

Introduction: Electronic wooden fish

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【Training Camp】Small clock +1110814A

Introduction: An IoT clock designed based on ESP32-12F. The peripheral DS1302 clock chip is used to achieve accurate travel time and power-off travel time. It can be used with Arduino IDE.

Schematic PCB

LGT-Nano

Introduction: Based on the domestic LGT8F328P chip, the pin size sequence is compatible with the LGT-Nano development board of Arduino NANO

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esp01s Internet of Things desktop ornaments

Introduction: An Internet of Things desktop ornament based on esp01s, which can display the weather temperature conditions for three days and the number of fans of station b. Supports ssd1306 and sh1106 driven OLEDs

Schematic PCB

Zhang Susu graduation project

Introduction: None

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Zhang Su’s graduation project main control panel

Introduction: None

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wireless keyboard

Introduction: Use esp8266 plus CH9328 chip to implement customized keyboard functions. Through the ESP-NOW protocol, you can wirelessly control keyboard execution.

Schematic PCB

RFID switch 2

Introduction: Use esp8266 as the main control to make an access card swipe switch

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PCF8574

Introduction: Use PCF8574 chip and I2C communication to realize IO control

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DeerESP

Introduction: DeerESP is an expansion project of PushDeer in the IOT direction. It is a messaging device solution based on ESP8266.

Schematic PCB

ESP32-C3-32S expansion board

Introduction: esp32c3-32s development board, sd card holder, 1.14TFT welding screen, five-way switch

Schematic PCB

Voice recognition module expansion board single module 9.0 fool-proof interface

Introduction: The speech recognition module only costs 10 yuan. What are you waiting for? Don’t you know how to use it? Simple operation, you can customize words, even a novice can make very interesting things with the mixly library

Schematic PCB

2021 Question I-Energy storage car with power generation function 2223

Introduction: The first work of the 21st National Electric Competition, an energy storage car with power generation function

Schematic PCB

TMK USB to USB converter

Introduction: You need USB host controller chip MAX3421e and AVR chip ATMega32U4. TMK firmware flashing and use

Schematic PCB