LM324 Integrated Operational Amplifier Application Circuit

PDF_LM324 Integrated Operational Amplifier Application Circuit.zip

Altium_LM324 Integrated Operational Amplifier Application Circuits.zip

PADS_LM324 Integrated Operational Amplifier Application Circuit.zip

BOM_LM324 Integrated Operational Amplifier Application Circuit.xlsx

93490

Screen clicker control board

This circuit board, when used with a mobile phone auto-clicker, allows you to play video liking and piano tile games.

This control board has multiple functions, including automatic mode, manual mode, and adjustment of video like frequency. It's very fun. More videos are available on my Douyin (TikTok) page.
 
// The source code and PCB for the above projects are publicly available. Search for the username "Qiqi Loves Microcontrollers" on the "LCSC Open Source Hardware Platform". // Microcontroller model: STC15W408AS 1. When programming, be sure to select built-in IRC=30MHz. 2. Set the reset pin to the IO port. 3. Uncheck the option to erase the user EEPROM area when downloading the user program.
/* No technical support is provided; this is just for free sharing out of passion. This is an open-source blogger's work; it is for use only and not for commercial purposes. Questions can be discussed in the comments section below. Designer of this solution: Qiqi 
Douyin: The Cutest Qiqi in the Universe Kuaishou ID: Qiqi Loves Microcontrollers Bilibili: Qiqi Loves Microcontrollers QQ: 1715755109 (For custom microcontroller programs and PCB designs, add as a friend and indicate your purpose. Paid designs 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). */

Source code.zip

Clicker video demonstration.mp4

Piano Tiles Video.mp4

A program that randomly likes content without any pattern. (Image file)

PDF_Screen Clicker Control Board.zip

Altium_Screen Clicker Control Board.zip

PADS_Screen Clicker Control Board.zip

BOM_Screen Clicker Control Board.xlsx

93491

STC8H8K64U Development Board

The STC8H8K64U development board is small but complete.

0. 4 independent LED channels
; 1. Two RS-485 channels
; 2. One I2C channel for OLED and BM8563 microcontroller
; 3. One SPI channel for SPI Flash and TF card;
4. 8-digit LED display;
5. Matrix keyboard expansion;
6. One NTC temperature sensor;
7. One photoresistor
; 8. One adjustable potentiometer;
9. One infrared receiver;
10. One passive buzzer;
11. One parallel LCD interface;
 
1. Reference source selectable 2.5V or 3.3V.
2. With ISP software, direct USB download and simulation are possible without a UART bridge chip.
3. The matrix keyboard interface outputs 4 PWM channels, suitable for motor-related experiments.
4. In addition to the OLED interface, an 8-bit LCD interface is also included
 
, suitable for microcontroller beginners to conduct experiments and easily verify various basic drivers.
 
Version 1.0 had issues with the op-amp power supply being reversed and the potentiometer position interfering with the buttons; P3.2 was not connected with a pull-up resistor. Version 1.1 has fixed these issues.
 
The attached file is a simple example that displays the potentiometer and photoresistor's ADC on a digital tube; the program uses a 22.1184MHz IRC.

ADC+ TUBES.7z

4fc545e3989e9f1e6b25800b55042892.mp4

PDF_STC8H8K64U development board.zip

Altium_STC8H8K64U development board.zip

PADS_STC8H8K64U development board.zip

BOM_STC8H8K64U Development Board.xlsx

93492

electronic