environment-sensor-bluetooth

Introduction: ESP32-based low-power Bluetooth environmental temperature, humidity and illumination sensor

Schematic PCB

TP4056 lithium battery charging board

Introduction: 3.7V lithium battery charging template, used to charge single-cell lithium batteries, or integrated into other products for use as charging master control.

Schematic PCB

ESP485

Introduction: RS485 meter reading module

Schematic PCB

[Internet of Things] Hongmeng Smart WiFi Switch 1256

Introduction: Use Hongmeng Hi3861 chip combined with servo to realize remote control of physical switches in dormitory

Schematic PCB

Hongmeng smart WIFI switch

Introduction: Hongmeng Smart WIFI Switch

Schematic PCB

Two-way DCDC-2022 school team recruitment-hardware solution

Introduction: The school team of Xiaobaodian Electric Competition is recruiting new questions, two-way DCDC, mainly using SC8815 and ESP32-C3. I was too lazy to weld the board and gave up, so the plan was not verified.

Schematic PCB

1212 power bank

Introduction: ip5306 charging and discharging chip, simple power bank

Schematic PCB

IP6505 dual-channel desktop charger

Introduction: 24W dual-channel step-down fast charging module with anti-reverse connection, fuse and TVS

Schematic PCB

ip2326 three-string lithium battery Type-C fast charging module

Introduction: Three-string boost lithium battery charger with adjustable voltage and current, adaptive power, supports fast charging protocol

Schematic PCB

Power Systems

Introduction: Input AC100V~265V, output, 5V_3A, 3.3V_3A, 9V_1A, 5V_0.1A, 4V_2A, 3.3V_0.5A, 2.5V_0.5A, 1.8V_0.5A

Schematic PCB

ATX power plan

Introduction: Improved based on the kcores open source project CSPS power transfer. It has been updated to many versions, and this is the one I am most satisfied with so far. Please follow the kcores open source agreement when using it.

Schematic PCB

[Internet of Things] Hongmeng Smart WIFI Switch +4240036A

Introduction: Using Hongmeng Hi3861 chip to realize WIFI remote control of physical switches

Schematic PCB

Hongmeng IoT WiFi switch

Introduction: Use the Hongmeng Hi3861 chip combined with the servo to remotely control the physical switches of the home through WiFi

Schematic PCB

【Creative PCB】Dragon Boat Festival Zongzi PCB

Introduction: The Dragon Boat Festival in 2022 is coming soon. I made a cute rice dumpling PCB. The rice dumplings are the love of thousands of rivers and mountains.

Schematic PCB

ETA9740 universal power board

Introduction: ETA9740-MT3608-117 3.3 combination power module, 9740 is responsible for battery charging and discharging, MT3608 has adjustable voltage, and 1117 output is fixed at 3.3V.

Schematic PCB

SY8008 ultra-small step-down module

Introduction: Ultra-small DCDC step-down module using SY8008/SY8088 chip, size 16x11mm, input voltage 2.5V~5.5V, maximum current 1A, pin hole spacing compatible with perforated boards.

Schematic PCB

USB-HUB MA8601/FE1.1S TYPE-C special version

Introduction: Dedicated USB-HUB. The input is TYPE-C and the output is TYPE-C*4. The purpose is to solve the problem that sometimes the computer USB port is not enough and the data cable will not be connected back and forth (the data cable made by yourself is basically unusable by others).

Schematic PCB

433 RF Butler

Introduction: 433 radio frequency housekeeper, a radio frequency housekeeper that uses Hummingbird Wireless's Far-T2 for 433 transmission and Far-R1L for reception.

Schematic PCB

Soldering iron modification

Introduction: New wine in old bottles, 2-in-1 in 8786 shell, https://www.mydigit.cn/thread-218455-1-1.html

Schematic PCB

High frequency soldering station + hot air gun motherboard

Introduction: High-frequency soldering station + hot air gun control panel https://www.mydigit.cn/thread-300251-1-1.html

Schematic PCB