213EinkBeep

Introduction: Add hourly sound reminder function to 2.13-inch ink screen clock

Schematic PCB

2.13-inch ink screen network clock

Introduction: 2.13-inch ink screen network clock source code

Schematic PCB

ESP32 automatic downloader

Introduction: ESP32 automatic downloader, which can be used to download ESP32 chips and supports one-click downloading.

Schematic PCB

Dual-channel relay and four-channel LED controller based on ESP32

Introduction: Using ESP32-C3 as the main control, it can control dual relays and four LED channels, and can realize remote switching functions.

Schematic PCB

ESP8266 ceramic LED clock hollow version 26mm filament

Introduction: ESP8266 digital NTP clock

Schematic PCB

Ceramic LED 38mm single digit clock slotted vertical version

Introduction: This is the 38mm version. I will share the main control later.

Schematic PCB

[Solicitation Order] Programmer Lao Huangli

Introduction: The board based on the esp32-s2 module currently verifies that all functions are normal. The program has been written and the folder has been created. ps: io46 cannot be used as an output pin.

Schematic PCB

Opamp-Simplistic

Introduction: Homemade simple operational amplifier, configured as a non-inverting amplifier circuit.

Schematic PCB

Revised bench drill

Introduction: Revised bench drill

Schematic PCB

Make your own ultra-low-cost bench drill for less than 60 yuan

Introduction: A desktop bench drill that costs less than 60 yuan and has a reduction ratio of 3.75.

Schematic PCB

CH552g volume knob

Introduction: Volume adjustment knob PCB of CH552g master control

Schematic PCB

JLink ARM OB simulation debugger with a width of less than 1 cm [verified]

Introduction: A download emulator using STM32F072CBU6, with the same functions as J-Link and ST-Link.

Schematic PCB

Type-C female to Type-C male socket, ip5306 charging

Introduction: Since there is no type-c horizontal female to type-c vertical male converter on the market, many friends who use small TVs or snowflake lamps as desktop ornaments cannot stand on the desktop, so they use ip5306 chips. A charging base is provided for everyone to play with.

Schematic PCB

Tuya BT3L module four-way switch

Introduction: Tuya BT3L module four-way switch

Schematic PCB

【RA】R7FA2E1A72DFL development board

Introduction: Development board based on Renesas R7FA2E1A72DFL, using ESP-WROOM-02 as WIFI module!

Schematic PCB

Tuya CBU module four-way power strip

Introduction: Tuya CBU module controls four-way relays

ESP8266 Internet of Things Development Board V2.0

Introduction: Based on the modification of Jixiaoxin's open source IoT development board, ESP-12F development board, the Type-C version adjusts the order of pins IO5 and 3V3 in the upper right corner so that the three-pin DHT11 temperature and humidity module on the blue board can be directly inserted.

Schematic PCB

PAM2803 test board

Introduction: Use a voltage as low as 0.9V to drive lighting white LEDs, using a test board with a PAM2803 chip.

Schematic PCB

programmable breadboard

Introduction: Replace jumpers with analog switch matrix chips.

Schematic PCB

1.69-inch capacitive screen adapter board

Introduction: 1.69-inch capacitive screen adapter board

Schematic PCB