Electronics > Beginners
Multimeters and Resistors
<< < (12/13) > >>
6PTsocket:
I think you better get the meter squared away first.On a manal ranging meter, the lowest range that will display the value will give the greatest accuracy. You don't have to do any calculating. Just read the meter. Depending on the range the range the meter might express 1.2k as 1200 ohms. 500,000 ohms is .5 megohms. It is no different than going from mm. to cm. to meters. Work with resistors long enough and the color code will become second nature. Just memorize the colors There are only 12, including gold and silver.

Sent from my SM-G900V using Tapatalk

Jwillis:
A really bright cool white lamp and a pair of 4X reading glasses works for me .A loupe for those smd.s and 1/8W axials.But still measure with an DMM or milliohm meter.One day I'll invest in a Digital microscope.
6PTsocket:

--- Quote from: Jwillis on August 26, 2018, 04:05:03 am ---A really bright cool white lamp and a pair of 4X reading glasses works for me .A loupe for those smd.s and 1/8W axials.But still measure with an DMM or milliohm meter.One day I'll invest in a Digital microscope.

--- End quote ---
Reading them is only half the battle. After that you have to replace those little #%=× SMD's. They have special desoldering solder, heat guns, tweezers, flux, vacuum pick ups; ARGHHH!!!! I guess I am going to have to bite the bullet and develop some new skills. With leaded components you could fudge it if the replacement was not the exact same physical size but SMD resistors come in a while bunch of physical sizes.

Sent from my SM-G900V using Tapatalk

JS:

--- Quote from: 6PTsocket on August 28, 2018, 01:35:51 pm ---
--- Quote from: Jwillis on August 26, 2018, 04:05:03 am ---A really bright cool white lamp and a pair of 4X reading glasses works for me .A loupe for those smd.s and 1/8W axials.But still measure with an DMM or milliohm meter.One day I'll invest in a Digital microscope.

--- End quote ---
Reading them is only half the battle. After that you have to replace those little #%=× SMD's. They have special desoldering solder, heat guns, tweezers, flux, vacuum pick ups; ARGHHH!!!! I guess I am going to have to bite the bullet and develop some new skills. With leaded components you could fudge it if the replacement was not the exact same physical size but SMD resistors come in a while bunch of physical sizes.

Sent from my SM-G900V using Tapatalk

--- End quote ---

Desoldering TH parts makes pretty likely to break traces, specially in single sided PCBs where they usually grow. SMD parts also can be exchanged between a few sizes, some pretty tight PCB might not allow it but in many they will fit one size up and down. One problem could be power dissipation for parts with tight ratings, where you can't use smaller ones.

JS
ArthurDent:
One cheap item that could be a big help to you, that could verify what you think your multimeter is telling you, is a component tester. There are a lot of them on Ebay, generally for between $15-$25, and they work well. I have lots of test equipment but for a quick check on a questionable capacitor or a resistor where all the colors are almost indistinguishable, it comes in very handy. The one thing to be very careful of is to make sure any capacitor you are testing is totally discharged or it can zap the tester. Other than that, the tester is almost foolproof and has a very good display with all the information you'll need on any component.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod