Need help determining Ohm value of resistor.

[Qiaozhi]

Is it possible to test this diode with the leads soldered in place, or would I have to desolder one lead ? Naturally, I would not have the power ON (fan plugged into an electrical outlet).

Set your meter to the diode test position, and put the leads across the diode (positive lead on anode, and negative lead on cathode). The reading should be close to 0.7V. Then try the leads the other way round. The reading will be something different (most likely there will be no reading). If in doubt, snip off one lead and retest.

[Qiaozhi]

My Son works for a company as a full-time Webmaster and is helping me to find a solution to the problem I've had with
this website not accepting ALT CODES.

As you can see from Post #4, the Geotech website does accept ALT-CODES. Which indicates that you either have a Windows 8 problem, or something specific to your computer.

[ToddB66]

Question about testing a diode.

Hi All !

I have a Hamilton Beach "True Air", model 04531GM , Series B2021AT, wall-mount fan/air freshener. This unit is comprised of a fan motor, ON/OFF switch and a LED. The Led appears to be white color and is soldered to a small PCB that has a diode and 33 Ohm resister sitting beside the diode. These components are soldered in place of course.

As a learning project, I would like to test the diode with my DMM, which is a Radio Shack catalog number 22-805 and has a diode setting, as well as the usual other settings.

I have attached a picture of a diode that looks like mine, with the silver band at the negative cathode end.

Is it possible to test this diode with the leads soldered in place, or would I have to desolder one lead ? Naturally, I would not have the power ON (fan plugged into an electrical outlet).

Thanks in advance for your replies.

ToddB66

[ToddB66]

Need help determining Ohm value of resistor.

Yes, Linux is a different OS, but obviously you are a Windoze user.
I do not currently have access to a Windows 8.1 machine, so perhaps someone else would kindly try entering some Alt Codes and report back.

Qiaozhi,

Thanks for your above reply!

My Son works for a company as a full-time Webmaster and is helping me to find a solution to the problem I've had with
this website not accepting ALT CODES.

Meanwhile, I can type my posts on Word Pad, which allows the Alt Codes, and then Copy & Paste into the posting window on Geotech. As they say, this is" the long way around the horn.", but works until we find a solution for direct input of Alt Codes from my keyboard into the posting windows at Geotech. BTW, I do make certain that the NmLk key is turned ON at my keyboard, but this still doesn't make it work.

ToddB66

[Qiaozhi]

Hi Qiaozhio !

My OS is Microsoft Windows 8.1. In addition, it is version 6.3.9600, Name IDEA-PC, Manufacturer LENOVO and model 10094.

Is Linux another OS ?

Thanks,

ToddB66

Yes, Linux is a different OS, but obviously you are a Windoze user.
I do not currently have access to a Windows 8.1 machine, so perhaps someone else would kindly try entering some Alt Codes and report back.

[ToddB66]

Thread title: Need help determining Ohm value of resistor

For linux, you need to use CTRL+SHIFT, tap U key, and then type the unicode. For example: CTRL+SHIFT, U, 171 gives: ű
The Alt Code list is different for Linux than for Windows.

Which OS are you using?

Hi Qiaozhio !

My OS is Microsoft Windows 8.1. In addition, it is version 6.3.9600, Name IDEA-PC, Manufacturer LENOVO and model 10094.

Is Linux another OS ?

Thanks,

ToddB66

[Qiaozhi]

For linux, you need to use CTRL+SHIFT, tap U key, and then type the unicode. For example: CTRL+SHIFT, U, 171 gives: ű
The Alt Code list is different for Linux than for Windows.

Which OS are you using?

[Qiaozhi]

Hi ToddB66,

In response to your email (all typed directly into the forum using ALT CODES):

♥ ♦ ♣ ♠ ☼ § % ü à ç

This was done using IE8 on Windows XP.
The Alt key method is unsupported on Linux systems.

[ToddB66]

33 ohms 10% tolerance

CAS.......Thanks for confirming that my resistor calculation of 33 Ohms, plus or minus 10 percent is correct !

I would also like a response from our master Carl-NC

ToddB66

[CAS]

Hi All !

What is the ohm value for resistor color bands (L-R) orange, orange, black, silver ?

ToddB66

33 ohms 10% tolerance

[ToddB66]

Hi All !

What is the ohm value for resistor color bands (L-R) orange, orange, black, silver ?

I get ( 33 x 1 ) =33 Ohm ± 10% = 29.7--36.3 Ohms

Here's what I based the above on after consulting resistor color band charts and instructions on the internet.


LEGEND:

• “column” refers to the left-to-right columns on a resistor color band chart.
  
• Orange significant figure = 3
  
• Black in the multiplier column is 10° (ten to the power of zero and zero power means to divide, so 10/10 = 1
  
• The 4th band is Silver in the Tolerance column and that is ±10%, or for 33 Ohms would result in an Ohm range of 29.7 to 36.3 Ohms for the subject resistor.
  

Did I interpret and calculate the Ohm value correctly ?


Thanks for replies.


ToddB66