Where to buy a resistor?

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gamemasterful
Posts: 78
Joined: Sun Oct 11, 2009 1:39 am

Where to buy a resistor?

Post by gamemasterful »

I went to my local radioshack but they didn't seem to have what I needed, and the datasheet for the pth08000wah seems very specific on what I need. I need a single resistor to get 5v. The datasheet says 353ohms but recommends 348ohms because it's easier to find. It also says it needs to have 1% tolerance (the reason my radioshack didn't have it.) Needs to be rated for 0.05 W and a temperature stability of at least 100 ppm/C. Going to digikey just confused me and I got some little black thing with non of the normal colored bars.
http://search.digikey.com/scripts/DkSea ... 480FRE6-ND" onclick="window.open(this.href);return false;

Could someone please point me in the right direction?
timmeh87
Senior Member
Posts: 3047
Joined: Mon Nov 14, 2005 10:19 pm
Location: Ontario, Canada

Re: Where to buy a resistor?

Post by timmeh87 »

Option 1: Get a 5% one, it will work fine. It just might be a little off, 338 ohms for example. There's an equal chance it will be 358 ohms though.

Option 2: Use a 500 ohm variable resistor. Preferably something that turns more than once. Like 5 turns.

Whatever 5v device you are powering will probably be happy with 4.7v. Aim for being too low rather than too high.
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gamemasterful
Posts: 78
Joined: Sun Oct 11, 2009 1:39 am

Re: Where to buy a resistor?

Post by gamemasterful »

It's for a retro duo.

What about the wattage? Lowest my radioshack had was either 1/4 or 1/8 watts. (can't remember). So should it matter that the resistor is rated with a higher wattage or is is a good thing?
timmeh87
Senior Member
Posts: 3047
Joined: Mon Nov 14, 2005 10:19 pm
Location: Ontario, Canada

Re: Where to buy a resistor?

Post by timmeh87 »

Higher is fine. Its a maximum rating.
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gamemasterful
Posts: 78
Joined: Sun Oct 11, 2009 1:39 am

Re: Where to buy a resistor?

Post by gamemasterful »

Thanks timmeh. You've been a big help!
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