Always. Check. The. Resistor. Values. Don't. Trust. The. Label.

Discussion in 'DIY' started by No Money, Jun 11, 2017.

  1. Alan0354

    Alan0354 Super Member

    Messages:
    1,665
    Location:
    Bay Area
    Seems like the SMD parts are a lot more accurate if you buy from Digikey etc. There is no marking on 0603, 0402 and smaller parts. You have to rely on their accuracy in manufacturing, the stake is too high. If there is any wrong part, it can cost a lot of money and the manufacturer will definitely complain and reputable distributors like Digikey will rectify the problem very very quick. Through hole resistors are really a thing of the past in the most part, quality control might be slipping. I never heard of SMD got it wrong from a few companies I worked for.
     
    Hyperion likes this.
  2. No Money

    No Money AK Subscriber Subscriber

    Messages:
    724
    Location:
    Hong Kong
    Alan, the resistors were colour coded correctly, they had just been put in the wrong bag by one of the major suppliers. They have credited me (at my request) with the (tiny) value of the resistors as I found I have spares of the 22ohm ones I needed.
     
  3. Alan0354

    Alan0354 Super Member

    Messages:
    1,665
    Location:
    Bay Area
    Yes, I know, I was just telling my experience that the resistor I got has wrong value from the color band.
     
  4. No Money

    No Money AK Subscriber Subscriber

    Messages:
    724
    Location:
    Hong Kong
    Ah, sorry.
     
  5. Mr. G

    Mr. G New Member

    Messages:
    9
    Just remember on resistors today red = brown = orange. That's all you have to know.
     
  6. RocketMonkey

    RocketMonkey Active Member

    Messages:
    255
    Location:
    Kansas city area
    I've seen this a couple times on new modern metal films, that or colors very vague. I have poor color vision so I never count on the bands because I'll screw it up on my own anyway. If I'm not assembly line building boards I do measure all through hole resistors, its faster than finding my reading glasses anyway lol.
     
  7. Bob

    Bob AK Subscriber Subscriber

    Messages:
    753
    Location:
    West coast
    the new ones which are smaller, have more bands ( and sometimes you read them
    backwards), and each band is very thin. It is impossible for me with ambient light and
    unassisted eyes to determine it's value. and I have to pull out a 5-band color diagram.

    For me, it is faster just to measure it.
     
    Hyperion likes this.
  8. Alan0354

    Alan0354 Super Member

    Messages:
    1,665
    Location:
    Bay Area
    Ha ha, are we all old folkies ( say farts) here, everyone ( including ME!!!) is having vision problem!!!:eek2:
     

Share This Page