Licky's Column

Sim's specifications

by Licky Li

Sim's specifications

1. Introduction to SIM (Subscriber Identity Module) A SIM card is a crucial component in mobile communication devices. Its specifications cover va...

Time domain Vs Frequency domain

by Licky Li

Time domain Vs Frequency domain

1. Definition and Concept Time Domain The time domain is a way of representing a signal where the independent variable is time. In other words,...

Headfone jack pinout and color codes

by Licky Li

Headfone jack pinout and color codes

Headphone Jack Pinout TRS (Tip-Ring-Sleeve) Jack: Commonly known as a 3-pole or 3-wire jack, it is widely used for headphones and audio cables w...

Different Voltage Regulators

by Licky Li

Different Voltage Regulators

Linear Voltage Regulators Working Principle: It stabilizes the output voltage by adjusting the conduction level of the internal transistor and c...

HC-SR04 Ultrasonic Sensor Pinout in detail

by Licky Li

HC-SR04 Ultrasonic Sensor Pinout in detail

The HC - SR04 ultrasonic sensor has four pins. Here is a detailed description of each pin: VCC Pin Function: This pin is the power supply pin ...

Flying Probe test

by Licky Li

Flying Probe test

Introduction to PCB Flying - Needle Testing The PCB flying - needle test is a crucial inspection method in the printed circuit board (PCB) manuf...

How to make a four-wheel drive?

by Licky Li

How to make a four-wheel drive?

Here's a general guide on how to make a simple four - wheel - drive (4WD) vehicle: 1. Design and Planning Determine the Purpose: Decide whether...

Serial port RS232 RS485 the most essential difference

by Licky Li

Serial port RS232 RS485 the most essential difference

RS - 232 and RS - 485 are both serial communication standards, and their most essential differences are as follows: 1. Electrical C...

What's the cracking process of chip decryption?

by Licky Li

What's the cracking process of chip decryption?

Chip Information Collection Determine the Chip Model This is the fundamental step of chip decryption. The specific model of the chip is determ...

USB Type A

by Licky Li

USB Type A

USB Type A is one of the most common types of Universal Serial Bus (USB) connectors. Here are the details: Physical Appearance It is a rectangula...

A strain gauge made entirely on a PCB

by Licky Li

A strain gauge made entirely on a PCB

A strain gauge made entirely on a Printed Circuit Board (PCB) is an innovative and practical device. Here's a detailed look at it: Structure and Fa...

Converting 4-20 mA Receiver Circuit Current to Voltage Using a Shunt Resistor

by Licky Li

Converting 4-20 mA Receiver Circuit Current to Voltage Using a Shunt Resistor

Key Takeaways Most industrial electronic process instruments utilize the 4-20 mA current loop bus. The receiver circuit is designed to measure or ...