A little question about Javascript Resistance Caculator

  • Context: Java 
  • Thread starter Thread starter KENNEL STW
  • Start date Start date
  • Tags Tags
    Javascript Resistance
Click For Summary
SUMMARY

The discussion centers on the calculation of resistor values based on color bands, specifically addressing the concept of tolerance in resistors. The first band indicates the tens value, the second the units, the third serves as a multiplying factor, and the fourth denotes tolerance levels. Tolerance is defined as the accuracy range of a resistor's nominal value, with common tolerances being ±20%, ±10%, and ±5%. The conversation also highlights practical challenges in reading color codes due to lighting conditions and color perception.

PREREQUISITES
  • Understanding of resistor color codes
  • Familiarity with electronic components
  • Basic knowledge of tolerance in electronics
  • Experience with multimeters for verifying resistor values
NEXT STEPS
  • Research the E series of preferred numbers for resistors
  • Learn about the electronic color code and its applications
  • Explore techniques for accurately reading resistor color codes under various lighting conditions
  • Investigate the use of digital multimeters (DVM) for measuring resistance
USEFUL FOR

Electronics enthusiasts, hobbyists, and students studying electrical engineering who seek to understand resistor values and color coding techniques.

KENNEL STW
Messages
1
Reaction score
0
Javascript Resistance Calculator

The values of the resistor are calculated from the colour of the bands. The values of the colours are shown in Table 1. The first band is the tens values. The second band gives the units, the third band is a multiplying factor the factor being 10band value. The fourth band gives the tolerance of the resistor. No band implies a tolerance of ± 20%, a silver band means the resistor has a tolerance of ± 10% and a gold band has the closest tolerance of ± 5%.

This is what I read in suplung,and I am not a native English speaker,so can you expain the word tolerance there to me? Thank you so much!Have a good day because there going to have a game of liverpool today hhhhh
 
Technology news on Phys.org
"tolerance" is the accuracy of a resistor's nominal value to its actual value.

A resistor that says "100Ω" with 20% tolerance could have a real value between 80-120Ω. If it is marked as 5% tolerance its real value should be between 95 and 105Ω.
 
Reply
  • Like
Likes   Reactions: Delta2 and malawi_glenn
Welcome to PF.
KENNEL STW said:
The values of the resistor are calculated from the colour of the bands. The values of the colours are shown in Table 1.
Can your use the "Attach files" link below the Edit window to upload Table1? Thanks.

Also, keep in mind that if you are trying to decode resistor color codes, you will need to be able to handle the color bands in either order. That's something that EEs deal with in real life all the time. Oh, and sometimes "red" is washed out to look more like "brown", and "gold" tolerance can look like "brown" too. So reading the color code can involve some AI (and/or guesswork and a DVM to back up the guesswork). :smile:
 
berkeman said:
Oh, and sometimes "red" is washed out to look more like "brown", and "gold" tolerance can look like "brown" too.
I have a compact fluorescent work-light with an emission spectrum that makes red and orange look the same to human eyes; 33k = 22k = 3k3.

Use daylight or a bright filament lamp to read component color codes.
 

Similar threads

Electrical Questions: Resistance, Resistor & Ohm's Law
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad Some questions about Cosmic Microwave Background radiation
  • · Replies 13 ·
Replies
13
Views
6K
Mathematica This Week's Finds in Mathematical Physics (Week 228)
  • · Replies 2 ·
Replies
2
Views
3K
Mathematica This Week's Finds in Mathematical Physics (Week 228)
  • · Replies 2 ·
Replies
2
Views
4K