The chip is packaged in a DFN-12 form factor, offering high space utilization.
Input voltage: 4-28V.
Output current: Maximum 16A. (A 16A or 8A current needs to be connected using a 0-ohm resistor, depending on requirements. For currents exceeding 6A
, a heatsink is recommended on the back of the PCB.) Output voltage: The resistance values of R1 and R2 control the output voltage. The resistance values can be calculated using the formula below. (A 10kΩ to 1mΩ resistor is recommended.) For higher power requirements, the inductor and output capacitor values can be adjusted according to the datasheet.
PDF_SY8368 High Current High Power Step-Down Module.zip
Altium_SY8368 High Current High Power Step-Down Module.zip
PADS_SY8368 High Current High Power Step-Down Module.zip
BOM_SY8368 High Current High Power Step-Down Module.xlsx
95204
Battery power tester (with C source code)
It detects battery voltage, calculates relative capacity, and displays the results intuitively using text and graphics.
This project provides a clear
and intuitive display of dry cell battery voltage and charge percentage, allowing users to easily monitor battery information.
The working principle
utilizes a PW5100 boost IC to raise the battery voltage to 3.3V, powering the STC8G1K08A microcontroller and a 0.96-inch display (160*80 resolution). The microcontroller's ADC pin acquires the positive terminal voltage of the battery, determines the corresponding charge percentage based on the voltage, and sends the data to the display via the SPI interface.
Key concepts include:
51 microcontroller, boost circuit, ADC, SPI, color screen, dot matrix, character modeling, line drawing, and graphics. Suitable for microcontroller beginners.
Design features:
1. Single-layer PCB design, voltage detection range 0.4V~3V (suitable for 1.5V dry cell batteries; above 1.56V, the charge is displayed as 100%).
2. Simple circuit, material cost around ¥5, can be hand-soldered, suitable for beginners.
3. Reserved serial port for easy program modification and debugging.
4. Consumes approximately 10mA of current, closer to the battery's operating voltage than a multimeter measurement.
Item No. |
Item
Price |
1 |
PW5100-3.3
| 0.30￥
| 2
| STC8G1K08A (must include the 'A' suffix, supports ADC)
| 0.70￥ |
3
| Molded Inductor 0420 4.7uH |
0.30￥ |
4
| 0.96-inch Color Display 160*80
| 3.70￥ |
5
| 12V23A Remote Control Battery Spring
| 0.10￥ |
Program
Includes Keil project source code, Keil version 5.38.
C.zip
PDF_Battery Power Tester.zip
Altium_Battery Power Tester.zip
PADS_Battery Power Tester.zip
BOM_Battery Power Tester.xlsx
95205
PLC program test board
PLC test board
PDF_PLC Program Test Board.zip
Altium_PLC Program Test Board.zip
PADS_PLC Program Test Board.zip
BOM_PLC Program Test Board.xlsx
95206
Digital tube rotary encoder
Real-time adjustment of the servo angle of the Yiweilian light switch device via serial port
Real-time adjustment of the servo angle of the Yiweilian light switch via serial port. This is a video demonstration of controlling it. [https://oshwhub.com/liujianqi1688/dan-pian-ji-guan-deng-shen-qi-lan-ren-kai-guan](https://oshwhub.com/liujianqi1688/dan-pian-ji-guan-deng-shen-qi-lan-ren-kai-guan
) The program can be downloaded directly (latest optimization as of November 20, 2024; one servo can be adjusted to three angles, highly recommended).
Below are the parameters for two servos installed on either side of the switch panel for on and off (for reference only). The angle can be fine-tuned according to the site conditions.
//The source code and PCB for the above work are publicly available. Search for the username "奇奇爱上单片机" on the "LCSC Open Source Hardware Platform".
//Microcontroller model: STC8G1K08 //1. When burning the program, be sure to select built-in IRC=30MHz. //2. Change the IRC debugging mode to "Do not adjust, use the internal preset frequency". //2. Set the reset pin to the IO port. //3. Uncheck "Erase user EEPROM area when downloading user program".
/*No technical support provided, just sharing for fun.*/ This is an open-source blogger's work; it is for use only and not for commercial purposes. For any questions, please discuss in the comments section below. Designer of this solution: Qiqi (
TikTok: The Cutest Mr. Qiqi in the Universe; Kuaishou ID: Qiqi Loves Microcontrollers; Bilibili: Qiqi Loves Microcontrollers); QQ: 1715755109 (For custom microcontroller programs and PCB designs, please add me as a friend and indicate your purpose. Paid design services are available; serious inquiries only). QQ Group: 499067314 (Welcome all microcontroller enthusiasts to join the group; group files and materials are available for free download).
eWeLink WiFi Lights Off Tool 40fps.mp4
STC burning software download requires specific settings. (bmp)
Serial encoder digital tube board.jpg
program.zip
The latest program optimization (20241120) allows for three adjustable angles with a single servo motor; highly recommended.zip
PDF_Digital Tube Rotary Encoder [Serial Communication Adjustable Servo Motor with Three Angle Values].zip
Altium Digital Tube Rotary Encoder [Serial Communication, Adjustable Servo Motor with Three Angle Values].zip
PADS Digital Tube Rotary Encoder [Serial Communication, Adjustable Servo Motor with Three Angle Values].zip
BOM_Digital Tube Rotary Encoder [Serial Communication Adjustable Servo Motor with Three Angle Values].xlsx
95207
electronic
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