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How can I identify the power rating (wattage) of my scavenged resistors? Answered

I am currently making a mini guitar amplifier, from this instructable, https://www.instructables.com/id/Make-a-Sweet-Portable-Guitar-Amp/, and i need a 1kΩ resistor.

I have accumulated a few components by de-soldering and scavenging parts from old, and broken electronic devices.

When I found out i needed a 1kΩ resistor, I looked up the ring code for that value and scanned over my broken electronic circuit boards to see if i could find a match. Which i did, but i do not know how many watts the resistor is rated at.

The resistor in question is no more than 3mm in length. I know that quite a lot of resistors are more like 5mm in length.

Can you tell from the physical size what the resistor I have is?(I will include a couple of pictures)

Discussions

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steveastrouk

Best Answer 7 years ago

Reckon on 1/8 W for the little one, and maybe 1/4 for the big ones.

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ARJOONsteveastrouk

Answer 7 years ago

this3 is3 als3o bothering me. es3pecially in televisions.. 3sometimes3 s3maller reis3tors3 s3eems to have bigger pow9er rating. w9hen compared to others

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steveastroukARJOON

Answer 7 years ago

It depends on the materials of construction as much as the size. Small, well made ones, may run hotter than cheaper ones, without losing life - but you still have to be careful not to burn anything !!

Steve

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mdog93steveastrouk

Answer 7 years ago

ok, so if i need a 1/4 resistor i need to find one like the larger size to be safe?

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mdog93steveastrouk

Answer 7 years ago

ok, anywhere easy to find these, maybe a common use i could scavenge one from. Cause I live in the UK and the only shop you can buy components from is Maplins (like radioshack) firstly which is very expensive and secondly i don't think they sell singular resistors.

Maybe i should buy a mixed resistor pack anyway, if i want to do more electronics in the future

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steveastroukmdog93

Answer 7 years ago

You can buy from RS, Farnell and Rapidonline as well !

Steve

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mdog93steveastrouk

Answer 7 years ago

yeah but for a few parts i don't really wanna pay handling and shipping fees

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steveastroukmdog93

Answer 7 years ago

and the only shop you can buy components from is Maplins (like radioshack) firstly which is very expensive and secondly i don't think they sell singular resistors.

Its still cheaper than Maplin, and the choice is a lot wider.The kids in the electronics club I help run club together and buy a lot at one time from Rapid

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mdog93steveastrouk

Answer 7 years ago

ok. I don't need much more now anyway that's the thing i'd rather avoid it if i can. I'll compare some prices.

BTW i need to find a 10kΩ 1/2 watt potentiometer. I believe a linear type. I found a couple of miniture ones and even standard ones but none that appearred to be 1/2W rated.

But i'll see what rapid electronics has on that subject too