Author Topic: Understanding part specifications: 220 v 16 pin resistor DIP  (Read 2165 times)

0 Members and 1 Guest are viewing this topic.

Offline ksquaredTopic starter

  • Jr. Member
  • **
  • Posts: 41
  • Helpful? 0
As it says on the tin, 220 v 16 pin resistor DIPs is all the information my book, 123 robotics expmeriments for the evil genuis, seems to give in the text to describe that part.  It does not state the resistince, but on the pictures in the example, the part number is (seemingly) 4110R-1, and on the next line221.  I've found that part number for sale, I think, but no confirmation of what it actually is.  I'm not terribly confident on what the bottom line on the part says, it has several characters/markings I can't make out, denoted by ?:

? (B?)C?227

That might be a B.

Also, by convention what are these numbers trying to express?

Thanks for any assistance!

Offline GearMotion

  • Supreme Robot
  • *****
  • Posts: 489
  • Helpful? 24
  • Two decades+ of Embedded Design
Re: Understanding part specifications: 220 v 16 pin resistor DIP
« Reply #1 on: June 17, 2009, 04:26:00 PM »
I have that book (123 Robotics Experiments for the Evil Genius by Myke Predko) but as there are 350+ pages in the book, how about a little direction? Can you mention the page number? I'm sure I can help you if you help me.

Offline GearMotion

  • Supreme Robot
  • *****
  • Posts: 489
  • Helpful? 24
  • Two decades+ of Embedded Design
Re: Understanding part specifications: 220 v 16 pin resistor DIP
« Reply #2 on: June 17, 2009, 04:48:55 PM »
Ah. Apparently the "v" should be an omega. Therefore the DIP package of resistors is 220 ohm.


Like this: http://digikey.com/scripts/partsearch.dll?Detail&name=4116R-1-221LF-ND
« Last Edit: June 17, 2009, 04:50:55 PM by GearMotion »

Offline ksquaredTopic starter

  • Jr. Member
  • **
  • Posts: 41
  • Helpful? 0
Re: Understanding part specifications: 220 v 16 pin resistor DIP
« Reply #3 on: June 17, 2009, 05:37:51 PM »
Ah!  Ohms.  Thanks.  That actually sounds right. If you would like the page number: page 31, experiment 11, Assembling the included PCB. 

And thanks again for the hands, everybody.

Offline pomprocker

  • Supreme Robot
  • *****
  • Posts: 1,430
  • Helpful? 16
  • Sorry miss, I was giving myself an oil-job.

Offline Soeren

  • Supreme Robot
  • *****
  • Posts: 4,672
  • Helpful? 227
  • Mind Reading: 0.0
Re: Understanding part specifications: 220 v 16 pin resistor DIP
« Reply #5 on: June 17, 2009, 06:28:47 PM »
Hi,

[...] and on the next line221. [...]

Also, by convention what are these numbers trying to express?
This format is used on several types of resistive components and on almost all DIP and SIL resistor arrays
The first two digits is read as what they say and the third is the number of zeros following (in Ohm):

Your "221" means 22 with one (1) zero after i.e. 220 Ohm
Had it been eg. "224", it would have been 220000 Ohm = 220 kOhm and "220" means 22 Ohm as it have 0 (no) zeros trailing.
It's quite easy to read, once you know how to "decode" it.

You'll find the same notation on eg. SMD resistors (the large ones at least, like 1206 and 0805).
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

 


Get Your Ad Here

data_list