LED lighting development board based on STC8H8K64U

WeChat_20240711160338.mp4

PDF_LED Lighting Development Board Based on STC8H8K64U.zip

Altium-based LED development board (based on STC8H8K64U).zip

PADS_LED Development Board Based on STC8H8K64U.zip

BOM_LED Lighting Development Board Based on STC8H8K64U.xlsx

93825

#Training Camp# A Simple Digital Oscilloscope Based on STM32

A simple digital oscilloscope based on STM32, designed and implemented using the B-side EDA video BV1py421i76N, without modifications.

A digital oscilloscope is an instrument used to display electrical signal waveforms. It mainly consists of analog front-end processing circuits, microcontroller circuits, power supply circuits, control circuits, trigger circuits, and calibration circuits.
 
This project presents a simple STM32-based oscilloscope for detecting and displaying waveforms. It features an adjustable PWM square wave output with adjustable frequency and duty cycle, powered via Type-C.
 
The input signal amplitude can be measured from -1.6V to 5V and from -80V to 250V by adjusting the switch. When the input signal amplitude is small, the lower voltage range should be selected first. If the input signal amplitude is uncertain, the higher voltage range can be used first. If it falls within the lower voltage range, the lower voltage range can be used for more accurate measurement results, while also protecting the circuitry.

An additional PWM signal is used to simulate a simple function generator, allowing the output of a simple square wave signal by changing the frequency and duty cycle of the output PWM.

 
Engineering design source:
202: Simple Digital Oscilloscope Project Document (yuque.com)
【LCSC GD32E230C8T6】Simple Digital Oscilloscope Design - Feishu Cloud Document (feishu.cn)
The core board supports LCSC's GD32 small board and STM32F103 small blue board, but the programs used are different.
 
 

fa7bfd2e8db76aeb4ff5fe621144c80.jpg

Simple Oscilloscope Program (STM32 Version).zip

PDF_#Training Camp# Simple Digital Oscilloscope Based on STM32.zip

Altium_#Training Camp# Simple Digital Oscilloscope Based on STM32.zip

PADS_#Training Camp# Simple Digital Oscilloscope Based on STM32.zip

BOM_#Training Camp# Simple Digital Oscilloscope Based on STM32.xlsx

93826

Industrial control board design based on STC microcontroller

An industrial control board based on the STC32 microcontroller was designed.
It is compatible with both STC8 and STC32 chips.
The project design includes 12 input ports and 12 output ports, which can replace a PLC to implement simple input/output port functions.

This document describes the
design of an industrial control board based on the STC32 microcontroller. The board
is compatible with both STC8 and STC32 chips. It features 12 input ports and 12 output ports, capable of replacing a PLC and implementing simple input/output functions. The schematic diagram illustrates the power supply circuit using a BUCU power supply chip (XL1509-5) with 24V input and 5V output. The I/ O input ports utilize PC817 optocouplers for isolation; adjusting resistors R1 and R2 allows for different input voltages. Low level is the common terminal, and high level is the input terminal. The I/O output ports use a ULN2003 Darlington chip to drive relay outputs . The document also includes PCB design notes, such as layout, wiring, line width, and spacing. The software description includes a simple I/O test code snippet; more complex functions can be designed according to project requirements. The code snippet provided is an example of a simple I/O test code snippet . else Y01=0; if(X02 == 0) {Y02=1 ;} else Y02=0; if(X03 == 0) {Y03=1 ; } else Y03=0; if(X04 == 0) {Y04=1 ;} else Y04=0 ; {Y06=1 ;} else Y06=0; if(X07 == 0) {Y07=1 ;} else Y07=0; if(X10 == 0) {Y10=1 ;} else Y10=0; if(X11 == 0) {Y11=1 ;} else Y11=0; if(X12 == 0) {Y12=1 ;} else Y12=0; if(X13 == 0) {Y13=1;} else Y13=0; Physical Demonstration Notes: Since this is not currently used in an actual project, relays are not installed (relays are quite expensive). Important Notes: This section outlines some precautions to take during the creation of the project (optional). Demo Video Notes: The demo video is attached. Other Attachment Upload Notes: Entries participating in this event must upload all relevant program attachments to an open-source platform or personal code storage cloud. The maximum upload size for attachments is 50MB (please do not upload to the LCSC workspace, as there are limitations).

video.mp4

PDF_Industrial Control Board Design Based on STC Microcontroller.zip

Altium-based industrial control board design using STC microcontroller.zip

PADS_Industrial Control Board Design Based on STC Microcontroller.zip

BOM_Industrial Control Board Design Based on STC Microcontroller.xlsx

93827

JLCPCB Temperature and Humidity Training Camp - SHT40

I made two versions: one with an ESP8266 + OLED display and the other with an ESP32 as the main controller and an ILI9341 touchscreen as the display. I will design the casing later. The cover features the ESP8266 + OLED 0.96 version. Other versions haven't been made yet.

I made two versions: one uses an ESP8266 + OLED, and the other uses an ESP32 as the main controller and an ILI9341 touchscreen as the display.

firmware.bin

PDF_JALCIC Temperature and Humidity Training Camp - SHT40.zip

Altium_JALCSC Temperature and Humidity Training Camp - SHT40.zip

PADS_JALCSC Temperature and Humidity Training Camp - SHT40.zip

BOM_JALCIC Temperature and Humidity Training Camp - SHT40.xlsx

93828

IP2326_2S_3S Charging Manager

A lithium battery charging manager based on IP2326 with selectable 2S-3S charging and a selectable charging current of 0.5-1.5A.

Description:
This is a lithium battery charging manager based on IP2326. The maximum charging power is 12W for 2 seconds and 15W for 3 seconds.
The input is USB_C. For maximum charging efficiency, it is recommended to use a QC-compatible charger. IP2326 can request fast charging voltage from the input via DP/DM based on the current battery voltage.
The output uses an HX 2.54-4P connector, consisting of battery +, battery -, and an NTC resistor (optional).
 
Instructions for use:
1. Before powering on, set the number of battery cells (****Important****) and the charging current. DIP switches 1 and 2 are used to set the charging current: both 0, 0.5A; one 1, 1A; both 1, 1.5A. DIP switch 3 is used to set the number of battery cells: 0 for 2 seconds, 1 for 3 seconds.
2. If using an NTC charger, attach the NTC to the battery, connect the battery, and then connect the USB_C input.
3. During charging, the CHG indicator light will illuminate. If the battery voltage is too low, the CC indicator light will not illuminate, indicating trickle charging. Once a certain voltage is reached, the CC indicator light will illuminate, indicating constant current charging. The charging current will be the current set above.
4. The CHG indicator light will turn off when fully charged. The CHG indicator light will flash when an abnormality is detected.
5. Charging output will automatically shut off if the charging time exceeds 12 hours.
Soldering Instructions:
1. Do not solder anything marked NC on the board.
2. Use an RNTC=100K thermistor (B=4100) for the NTC resistor. Simultaneously, solder an 82K parallel resistor onto the TBD resistor. C12 can be 1-100nF or omitted.
3. If not using an NTC resistor, solder a 51K resistor onto the TBD resistor; otherwise, malfunction will occur.
4. For beginners, it is recommended to solder the IP2326 and USB first, then other resistors and capacitors, then the inductor, and finally the DIP switch and output socket.
5. The 2.54mm header pins are mainly for convenient MCU monitoring of input and output voltages, NTC temperature, and charging indicators when out in use. If not needed, soldering is unnecessary and will not affect operation.
 
Additional note:
Actual measured charging current at 1A resulted in a maximum chip temperature of approximately 43 degrees Celsius – quite cool!
Precautions:
**************For safety, lithium battery charging must be supervised! ****************
**************Do not charge the battery unattended! ****************

PDF_IP2326_2S_3S Charging Manager.zip

Altium_IP2326_2S_3S Charging Manager.zip

PADS_IP2326_2S_3S Charging Manager.zip

BOM_IP2326_2S_3S Charging Manager.xlsx

93829

USB expansion dock

The project uses SL2.1A as a USB extension, combined with RTL8152B-VB-CG Ethernet chip and RTL8188EUS chip for WIFI.

1. Project Description:
This project uses the SL2.1A as a USB expansion port, combined with the RTL8152B-VB-CG Ethernet chip and the RTL8188EUS chip for Wi-Fi.
2. Project Features:

Supports USB 2.0 expansion from 1 to 2;
supports driverless expansion;
supports 100Mbps Ethernet ports;
includes a built-in Wi-Fi port;
driverless operation under Linux, Windows, and Mac.

PDF_USB Dock.zip

Altium_USB Dock.zip

PADS_USB Dock.zip

BOM_USB Dock.xlsx

93830

miniPCIe external quad-port network card

miniPCIe adapter for RTL8111H quad-port network card

Related post: https://www.mydigit.cn/thread-462093-1-1.html
 
Modifications compared to the original PCB design:
1. The miniPCIe adapter board's gold fingers were changed, with the orientation reversed. This should eliminate motherboard compatibility issues, but it hasn't been verified through PCB fabrication.
2. The 3.3V main power supply and 3.3V AUX switching circuit were modified, but this hasn't been verified through PCB fabrication either.
If the wake-on-LAN function is not needed, the wake-on-LAN circuit can be omitted; simply short-circuit the DIR resistor or install a 0-ohm resistor.
(Because this is for software router use, the wake-on-LAN function has also not been verified; you can verify it yourself if needed.)