Skip to content
Open: 24Hrs#San Jose California
Facebook page opens in new windowX page opens in new windowPinterest page opens in new windowYouTube page opens in new window
The Engineering Knowledge
Knowledge For All Engineers
  • Blog
  • $2 for 1-8 layer PCBs
Search:
  • Blog
  • $2 for 1-8 layer PCBs

Best Magnifying Glass for Coins Buying Guide | Coin Collecting Magnifiers

2025 Best Magnifying Glass for Coins Buying Guide | Coin Collecting Magnifiers

U.S. COINS GUIDEBy Scott SpencerJune 24, 2023Leave a comment

Hello readers welcome to the new post. In this post we will discuss the 2025 Best Magnifying Glass for Coins Buying Guide | Coin Collecting Magnifiers. The best magnifier is that helps to easily differentiate mint marking dates, and other factors of coins. best coin magnifiers also come with LED lighting and accurate 5-10x magnification…

Details
1981 Quarter Value 2023 Guides (Rare Errors, “D” & “S” Mint Mark)

1981 Quarter Value 2025 Guides (Rare Errors, “D” & “S” Mint Mark)

U.S. COINS GUIDEBy Scott SpencerJune 24, 2023Leave a comment

Hello readers, welcome to the new post. In this post, we will learn the 1981 Quarter Value 2025 Guides (Rare Errors, “D” & “S” Mint Mark). The 1981 quarter is part of the 1932 quarter series and comes with a photo of President Washington on the front side. The 1932 quarters were made with 90…

Details
1990 Quarter Value And Varieties

1990 Quarter Value, Worth in 2025 (Rare Errors, “P”, “D” & “S” Mint Marks)

U.S. COINS GUIDEBy Scott SpencerJune 23, 2023Leave a comment

Hello guys, welcome to the new post. In this post, we will discuss the 1990 Quarter Value, Worth in 2025 (Rare Errors, “P,” “D,” & “S” Mint Marks). The 1990 quarter value is high for current coins without the use of costly metal content. Quarter coins were first made in 1932 to celebrate the 200th…

Details
1968 S Penny Value

1968 S Penny Value in 2025 | How Much Is It Worth and Why?

U.S. COINS GUIDEBy Scott SpencerJune 20, 20231 Comment

Hi, guys, welcome to the new post. In this post, we will learn about the 1968 S penny value in 2025. How Much Is It Worth and Why? The 1968 S penny was loved by different coin users and collectors. Its value is of great interest to coin users as time passes. There are different…

Details
1974 Penny Value

1974 Penny Value, Worth in 2025 | Learn the Value of This Lincoln Penny

U.S. COINS GUIDEBy Scott SpencerJune 19, 20231 Comment

Hello readers, welcome to the new post. In this post, we will learn about the 1974 penny value and worth in 2025. Learn the Value of This Lincoln Penny. The value of the 1974 Lincoln penny in average condition is about one cent, and the mint state is about $9.00. They are now common circulation…

Details
1974 Quarter Value

1974 Quarter Value, Worth in 2025 | History, Errors, and Value of a Classic Coin

U.S. COINS GUIDEBy Scott SpencerJune 18, 2023Leave a comment

Hello readers, welcome to the new post. In this post, we will learn the 1974 Quarter Value, Worth in 2025 | History, Errors, and Value of a Classic Coin. The 1974 quarter is the most searched, and there were hundreds of millions of 1974 quarters made; some are rare coins. These coins are part of…

Details
What is Lightning Arrester

What is a Lightning Arrester? : Working Principle, Types and Differences

Electronic TutorialBy Scott SpencerJune 17, 20233 Comments

Hello guys, welcome to the new post. In this post, we will learn what a lightning ester is. Lightning striking at the time of storms can be dangerous to circuits and human beings. The voltage-current surge can cause high damage and also electric fire. To reduce that risk, lightning arrestors are used. Different types of…

Details
How To Identify Components of a Circuit Board

How To Identify Components of a Circuit Board

Printed Circuit BoardBy Scott SpencerJune 16, 2023Leave a comment

Hello, readers, welcome to the new post. In this post, we will learn How To Identify the Components of a Circuit Board.  PCB boards are the main component of electronic projects, and the device comes with a different component that operates to have an accurate function. The knowledge of these components is required for preparing…

Details
What is Auto transformer Starter

What is Auto transformer Starter: Working & Its Applications, diagram,advantages

Electronic TutorialBy Scott SpencerJune 16, 2023Leave a comment

Hello readers, welcome to the new post. In this post, we will have a look at What is AutoTransformer Starter? An autotransformer is a certain type of transformer that comes with one isolated winding for step-up or step-down voltage. Auto here is not any type of automatic process, but it is the action of a…

Details
What is a PCB Flying Probe Test

What is a PCB Flying Probe Test and How Does it Work?

Printed Circuit BoardBy Scott SpencerJune 16, 2023Leave a comment

Hi guys, welcome to the new post. In this post, we will learn what a PCB flying probe is. PCB boards are complex and structured and have high-density components, and some testing processes of old types, like manual testing and bed-of-nails testing, are limited due to high cost, longer duration, and testing process. This is…

Details
←1
23456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051
…5253545556…
57585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174
175→
Contact Us

Submit

Recent Posts
  • DL2032 Equivalent, Features, Types, Uses & Dimensions
  • LR621 Battery Equivalent, Features, Uses & Dimensions
  • LR43 Battery Equivalent: Features, Dimensions, Uses & Types
  • 120 Volt Outlet: Everything You Need To Know
  • CR2430 Battery Equivalent: Features, Types, Dimensions, & Uses
Top Categories
  1. PCB Project
  2. Electronic Tutorial
  3. Proteus Project
Company
  • Advertise With Us
  • Our Services
  • About Us
 

Find us on:

Facebook page opens in new windowX page opens in new windowYouTube page opens in new windowLinkedin page opens in new windowPinterest page opens in new window
The Engineering Knowledge
  • $2 for 1-8 layer PCBs
  • Contact Us
  • Privacy Policy
  • Advertise With Us
  • Disclaimer
Previously used menu 13
Go to Top