AiPi-RD-Rotary

stm32f103c8t6_ucos-ii_demo.rar

3D shell file.rar

PDF_AiPi-RD-Rotary.zip

Altium_AiPi-RD-Rotary.zip

PADS_AiPi-RD-Rotary.zip

BOM_AiPi-RD-Rotary.xlsx

90796

CC Temperature and Humidity Meter & Clock & Perpetual Calendar

I recently wanted to pack up my 3D printer, but I was missing a temperature and humidity sensor. The cheap ones online weren't good enough, and the ones I liked were ridiculously expensive, so I decided to make one myself.
Besides functioning as a temperature and humidity sensor, it also has a clock, perpetual calendar, city weather, and air quality index functions.

The software
 
section is written using the Arduino IDE, and all pages use the native tft_Espi library.
Version 1.0 has five pages: temperature and humidity detection, clock & detection, city weather, calendar, and settings.
There are three buttons on the back: the side buttons are used to switch pages, and the middle button is used for confirmation with a short press and for sleep mode with a long press.
 
 
The main
 
controller selected is the ESP-wroom-32 module. Since it needs to be powered by a lithium battery pack, the power supply circuit does not use LDO, but uses a DCDC solution.
 
 
Several power-consuming components use transistors as switches. After sleep mode, the current is high.
 
 
 
Precautions:
 
      1. Required libraries:
            TFT_eSPI, OneButton, DFRobot_DHT20, ArduinoJson, NTPClient, ArduinoZlib (For the installation of this library, please refer to my Bilibili video: https://www.bilibili.com/video/BV1wj421Z7Ds/?vd_source=c106ac8c60f1249e356ef02bdcc85de7).
      2. The parts of the project that need to be modified: (1) The key in the Common file. This is self-explanatory. Register it yourself on Hefeng Weather. If you don't know how to register, refer to the video link above. (2) In the Task file, adjust the adcOffset parameter if the voltage detection is inaccurate, as the error will definitely be different for each board, and this can only be corrected through code.
      III. Pay close attention to the words highlighted in red in the BOM list; do not buy the wrong materials.
           Lithium battery packs must be purchased with built-in protection chips, as the PCB does not have charging and discharging protection circuitry. The battery pack should contain a maximum of two 18650 batteries; more than that will not fit. Of course, it can also be used continuously while plugged in, as batteries are not cheap.
 
 
Demo video:
 
https://www.bilibili.com/video/BV15C411E7Jc/?vd_source=c106ac8c60f1249e356ef02bdcc85de7
 
 
Resource downloads:
 
CC Temperature and Humidity Meter 1.0 source code package: https://pan.quark.cn/s/2fc2e1064f08
tft_espi configuration file: https://pan.quark.cn/s/671f7b675051
BOM list (add purchase link on screen): https://pan.quark.cn/s/746a18b07f21
Shell files: https://pan.quark.cn/s/ad7dabe86efd
3D modeling source files: https://pan.quark.cn/s/075d7af6f176
 
 

PDF_CC Thermohygrometer & Clock & Perpetual Calendar.zip

Altium_CC Thermometer & Humidity Meter & Clock & Perpetual Calendar.zip

PADS_CC Thermometer & Humidity Meter & Clock & Perpetual Calendar.zip

BOM_CC Temperature and Humidity Meter & Clock & Perpetual Calendar.xlsx

90797

PAW3395 mouse based on STM32

This project is a wired mouse based on the STM32F103C8T6 microcontroller. It uses the PixArt PAW3395 photoelectric sensor and communicates with the computer using the HID protocol. The nylon shell is 3D printed using LCSC's Monkey 3D printing technology.
Currently, it implements all the basic functions of commercially available mice.

I. Project Introduction
Bilibili Demo Video: https://www.bilibili.com/video/BV1BrH9ecEnd/?vd_source=cb3035aabee93b98268db84a2ab962fc
GitHub Open Source Address: https://github.com/Li-Dongze/stm32_paw3395_mouse
This project is a wired mouse based on the STM32F103C8T6 microcontroller. It uses the PixArt PAW3395 photoelectric sensor and communicates with the computer using the HID protocol. The nylon shell is 3D printed using LCSC's Monkey 3D printing technology. Project
Functionality:

Normal Mouse Functions: Cursor movement, left and right buttons, middle button, scroll wheel, DPI switching (LED flashes 3 times when DPI is switched).
Extended Functionality: Two custom buttons (interfaces reserved), not added in this example.

II. Motivation
I recently encountered an ADNS3080 optical flow sensor while working on digital image processing. It can generate black and white pixel images by taking close-up photos. After further investigation, I discovered that the sensor used in mice operates on the same principle, so I decided to make one myself. Adhering to the principle of doing it right, I chose the then-popular PAW3395 mouse sensor. For the main controller, I opted for the STM32F103C8T6, which was the most readily available.
III. Software Implementation
: Refer to the open-source GitHub address (detailed explanation available): https://github.com/Li-Dongze/stm32_paw3395_mouse
IV. Hardware Implementation:
The hardware is relatively simple, essentially consisting of an STM32 minimum system board + PAW3395 driver circuit + button and scroll wheel circuits, along with PCB and 3D shell adaptation. All details are included in the project file.
PAW3395 Purchase Link: [Taobao] http://e.tb.cn/h.gLP9ganzQMI5ptR?tk=80Nq3TwZ967 MF7997 "PAW3395DM-T6QU Gaming Mouse Sensor Optical Sensor PixArt Original Genuine Mouse Chip"
Click the link to open directly or search on Taobao to open directly.
Encoder Purchase Link: [Taobao] Limited Time Offer: ¥2 Off for Orders Over ¥20 http://e.tb.cn/h.gp8mxdU94VIInpI?tk=tyQa3TwZaDx MF3543 "TTC Kailh Mouse Wheel Encoder 7/8/9/10/11/13MM Razer Viper SENSEI G403G603G703"
Click the link to open directly or search on Taobao to open directly.

PCB file.rar

Software.rar

3D Shell.rar

PDF_ PAW3395 Mouse Based on STM32.zip

Altium_ PAW3395 mouse based on STM32.zip

PADS_ PAW3395 mouse based on STM32.zip

BOM_ PAW3395 Mouse Based on STM32.xlsx

90798

Automatic washing machine based on ESP32

Automatic washing machine based on ESP32, a modified Little Swan manual washing machine

Preface:
I have a manual sock washer that came with my Little Swan washing machine, which I always found cumbersome. I wanted to convert it to automatic, and luckily, JLCPCB and Espressif Systems held a "Design Competition Based on ESP32 IoT," so I signed up.
I'm not an electronics major, nor am I an embedded software developer; I just tinker with various software. Thanks to JLCPCB for supporting newcomers, I've learned a lot, so the code is open source. After modifying
the old machine : For the screen hole, be careful; I accidentally slid the right side too wide. Without comparison, you don't realize how thin the cables I usually buy are for drilling holes for external solenoid valve sockets. I recommend using scissors or something similar to plan the hole; using a drill can easily make the hole too big. The TTP223 touchscreen isn't sensitive enough; you need to use copper foil. Actually, you can use an ESP32 touchscreen directly. For the water level sensor, I bought an M04 water level detection module and wrapped it with electrical tape to avoid false readings. Key improvements: 1. Main motor supports forward and reverse rotation, theoretically resulting in cleaner socks. 2. Supports automatic water inlet and drainage, and spin-drying. 3. Must have an OLED display screen. 4. Maintain the original layout with minimal exterior modifications. 5. Automatically detects water level to avoid water pressure fluctuations and difficulty in controlling water level. 6. Supports buzzer reminders. 7. Must support OTA (Over-The-Air) updates (long press Touch during startup to enter OTA mode). Schematic diagram: Solenoid valve control, directly using the common FR120 control circuit, supports high-power motors . The main motor uses the common H-bridge chip DRV8870 for control, supporting forward and reverse rotation, with a maximum load of 3.6A and a voltage range of 6.5V~45V. For water level control, the mature M04 module is used, which is convenient for external connection. For DC-DC step-down, the MP2456 is still better . The ESP8266 is sufficient for the main controller, but this promotion requires the ESP32, so let's use it. The software uses Arduino + PlatformIO, which is relatively simple. The OLED part directly uses the u8g2 library commonly used for monochrome screens. For details, please refer to the attached source code or visit https://github.com/jecelyin/esp32-washer. Subsequent code updates will be available on GitHub.





 

demo.mp4

esp32_washer.zip

PDF_ESP32-based Automatic Washing Machine.zip

Altium_ESP32-based Automatic Washing Machine.zip

PADS_ESP32-based Automatic Washing Machine.zip

BOM_ESP32-based Automatic Washing Machine.xlsx

90799

electronic