How do you determine the wattage on a particular resistor? I have a psu that has a bad 1 megaohm resistor. I don't know the wattage? Can anyone possibly help out? I would appreciate it greatly!!!!
Thanks
Thanks
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Re: Resistors
You can usually tell by the size of the resistor.
Measure it's length & diameter, then check on the Digikey website for a similar sized resistor to find the wattage.________________________________________________
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Re: Resistors
you tell from the size usually - post a pic.Comment
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Re: Resistors
Thanks for the quick replies. I called local elec store & was told basically the same thing. (Not RS). The store has them in stock so i am headed that way.
4 acre electronics... Thanks again for your help. This site is amazing and the people are very knowledgeable and helpful. Thanks again...Comment
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Hey everyone,
I'm currently working on a mid-70s Sharp Electronic Digital Clock Radio, Model FY-70CH. I found the service manual online, printed it out, and have been studying it for a while. My main reasons for tackling this are: (1) I want to learn electronics and figured I'd start with something I had on hand, and (2) I want to fix its issues. Right now, the radio sounds awful, has about 5V DC at the speaker terminals, and the alarm time setting doesn't work. But I'm not asking how to fix these problems.
Instead, here's what's been bugging me so far:
The schematic... -
The resistor on this waterpik blew. I changed it with the a similar spec 47ohm 2 watt yageo resistor but it still keeps blowing the resistor. Checking with the multimeter the motor, capacitor, diodes, and thermal fuse all checked normal. Will a higher ohm resistor work better? What ohm resistor will work better to repair this waterpik? This video is showing the repair with a 56 ohm resistor https://www.youtube.com/watch?v=_J7_rV7ui1Y -
Unit goes into protection mode within a minute after turning on.
I get sound for a few second before protection mode.
The unit seems to be made up of "two identical halves", which I think will help during troubleshooting.
I tried finding a technical/service manual online but so far by Googling has returned no results.
I think I narrowed it down to Amp 1 in the first picture (pardon my ignorance if that is not an Amp). There are some burnt Chip resistors (shown in picture 2 right image). The big one (R49) is easy to tell from Amp 2 but... -
I have a Hoover FM216LI cordless vacuum which isn't charging its internal battery.
I opened up the unit, and it has 6x Samsung ICR18650-22P cells connected in series.
5 cells were at about 3.3-3.1V. one was at 2.4V, so I assumed this cell was bad that's why the vacuum wasn't charging so I replaced it with another 18650, but after that the problem still persists, the vacuum turns on a bit and then cuts out since the batteries are empty.
So I think the over discharged battery wasn't the culprit, it was a symptom of the unit not being able to charge its batteries.... -
I have purchased an 100-240v AC/5v 2a DC adaptor from aliexpress,and a month ago It smelled burning when I plugin it powerstrip.
Since then, This AC/DC adaptor have been out of order.
But A few days ago,I replace 0.5 watt resistor with 1 watt resistor(1ohm) in this adapter.
After replacing resistor,It succeed to recharge all of android phone.And When I measure voltage on the two pins of USB port,It shows 5.5v
Is it okay to replace 1/2 watt resistor with 1 watt resistor in AC/DC adapter?
And Is there any possibility that it will suddenly explode as well as to be out...
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