Licky's Column

Making a mini retro small TV with ESP32

by Licky Li

Making a mini retro small TV with ESP32

Construction ideas CRT attributes This retro TV has a cathode ray tube (CRT) display. It is a large vacuum glass tube that emits an electron be...

How to solve the problem that the reading fluctuation is very large when the 51 single-chip microcomputer uses ADC0808 in the physical object?

by Licky Li

How to solve the problem that the reading fluctuation is very large when the 51 single-chip microcomputer uses ADC0808 in the physical object?

When using ADC0808 in a 51 single-chip microcomputer to read analog signals, if it is found that the reading fluctuation is very large, the followi...

How to avoid the impedance mutation problem of interlayer connection when designing multilayer stack?

by Licky Li

How to avoid the impedance mutation problem of interlayer connection when designing multilayer stack?

The following are some methods to avoid the problem of impedance mutation of inter-layer connections when designing multi-layer stacking: 1.Accurat...

Impacts of Inter-Layer Impedance Mutation on Signal Transmission in Multi-Layer Stack Design

by Licky Li

Impacts of Inter-Layer Impedance Mutation on Signal Transmission in Multi-Layer Stack Design

When there is an impedance mutation of the inter-layer connection in the design of a multi-layer stack, it will have the following series of imp...

Power bank circuit board

by Licky Li

Power bank circuit board

What is power bank circuit board? A power bank printed circuit board is a piece of silicon chip, that acts as a mainboard of the power ba...

How does LCD module work？

by Licky Li

How does LCD module work？

What are the LCD module and its components Liquid crystal display module or LCD module is an electronic component used to display images and texts....
Posted in lcd

How Arduino PCB can be used?

by Licky Li

How Arduino PCB can be used?

What is an Arduino PCB An Arduino PCB is an electronic circuit board designed to hold components like resistors, capacitors and other par...

Type of PCB encapsulating adhesive

by Licky Li

Type of PCB encapsulating adhesive

What’s the type of PCB encapsulating adhesive The type of PCB encapsulating adhesive Common PCB encapsulating adhesive are Silicone, Ac...
Posted in #soldering

IC power pin connection for noise immunity and decoupling

by Licky Li

IC power pin connection for noise immunity and decoupling

There's been much talk on other Q&A threads on how to connect decoupling capacitors to an IC, resulting in two completely opposite approaches t...

What is the difference between VCC, VEE, VDD, and VSS in microcontroller pins?

by Licky Li

What is the difference between VCC, VEE, VDD, and VSS in microcontroller pins?

VCC Definition: VCC stands for Voltage Common Collector. It is the positive power supply voltage for a device. In many cases, it provides the p...

7 types of commonly used electronic test equipment

by Licky Li

7 types of commonly used electronic test equipment

Multimeter Multimeter – measure current (AC/DC), voltage (AC/DC) and resistance The multimeter is an electrical instrument that every e...

How to improve the welding reliability of QFN package bottom?

by Licky Li

How to improve the welding reliability of QFN package bottom?

Why is QFN disabled in some high-reliability electronic products in aerospace QFN is disabled in some high-reliability electronic products i...