Licky's Column

How to Fix a Cold Solder Joint?

by Licky Li

How to Fix a Cold Solder Joint?

What is a Cold Solder Joint? Cold solder joints, also commonly known as pseudo soldering, are one of the bad solder joints produced durin...

Why PCB Potting Matters ？

by Licky Li

Why PCB Potting Matters ？

PCB potting is a crucial process that involves encapsulating printed circuit boards (PCBs) and their components in a protective material, typically...

The Seven-Segment Display; Necessary Design Tips

by Licky Li

The Seven-Segment Display; Necessary Design Tips

Definition of Seven-segment display The seven-segment display is an electronic device built to help display numerical data from zero to nine and s...

PCB design from schematic : Tips and best practices for successful implementation

by Licky Li

PCB design from schematic : Tips and best practices for successful implementation

PCB design is an essential component of modern electronics. A printed circuit board (PCB) is a board that connects electronic components through co...

How to Use a GPS Receiver With Raspberry Pi 4 ？

by Licky Li

How to Use a GPS Receiver With Raspberry Pi 4 ？

Many projects require you to determine the position of your Raspberry Pi. Sometimes, you can’t use a cellular or Wi-Fi network for that task.  In ...

JFET: What Is It, How does It Work?

by Licky Li

JFET: What Is It, How does It Work?

What Is a JFET? Junction Field Effect Transistor (JFET) is a three-terminal active device with amplification function, and is the simplest ...

DC Motor Speed Control: 3 Useful Methods

by Licky Li

DC Motor Speed Control: 3 Useful Methods

DC Motor Speed Formula At first, let’s introduce the formula of DC motor speed: n=(U-IR)/KΦ Where “n” is the motor speed (rpm/min), “U” is ...

Choosing the Right RTC Battery for Embedded Systems

by Licky Li

Choosing the Right RTC Battery for Embedded Systems

How to Choose the RTC Battery for an Embedded System? Voltage: The voltage of the RTC battery should match the operating voltage of t...

STM32G4 Series Microcontroller High Performance MCUs

by Licky Li

STM32G4 Series Microcontroller High Performance MCUs

About STM32G4 The STM32G4 high-performance microcontroller is a unique next-generation creation by ST, featuring outstanding performance su...

DIY Alarm Wireless Sensor, Compatible With DSC PowerSeries Alarm System, With Keypad Status Indicator

by Licky Li

DIY Alarm Wireless Sensor, Compatible With DSC PowerSeries Alarm System, With Keypad Status Indicator

Supplies For the alarm panel (already installed): DSC PC1616/PC1832/PC1864 alarm panel (NOT compatible with other systems such as the DSC Neo ser...

ESP32-CAM Video Surveillance Robot

by Licky Li

ESP32-CAM Video Surveillance Robot

The ESP32-CAM is a very small camera module with the ESP32-S chip that costs approximately $10-$15. ESP32-CAM The ESP32-CAM module can...

LM32-Temperature Sensor

by Licky Li

LM32-Temperature Sensor