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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Resistor values for soundlab (newbie question)
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oldplasticbag



Joined: Nov 17, 2005
Posts: 4
Location: chicago

PostPosted: Mon Jan 23, 2006 8:14 pm    Post subject: Resistor values for soundlab (newbie question)
Subject description: 1% and 2%
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When I was ordering resistors from mouser I used that guys list parts and used the hyperlinks and I didn't pay attention and got 2% resistors instead of 1%!! I was wondering if using 2% will cause the soundlab not to work? thanks for your time time!
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ladislaobiro



Joined: Mar 24, 2005
Posts: 105
Location: Italy

PostPosted: Tue Jan 24, 2006 3:14 am    Post subject: Reply with quote  Mark this post and the followings unread

I don't think it could create any kind of working problem...
but I prefer to leave detailed explanations to someone else with wider skills and better english...
cheers,
ladislao
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oldplasticbag



Joined: Nov 17, 2005
Posts: 4
Location: chicago

PostPosted: Tue Jan 24, 2006 9:07 am    Post subject: Reply with quote  Mark this post and the followings unread

thanks for replying. I am not concern if the soundlab will not sound as it is orignally planned. and to update, it was my fault and not that fellow who posted the mouser listings.
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Uncle Krunkus
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PostPosted: Wed Jan 25, 2006 12:46 am    Post subject: Reply with quote  Mark this post and the followings unread

1% means the actual value will be within 1% of the markings. So a 470K 1% could be anywhere between 465.3K and 474.7K at a tolerance of 2% the actual value will be anywhere between 460.6K and 479.4K. So a particular 2% resistor may actually be closer to 470K than another 1% resistor. The tolerance is really just a way for the manufacturer to let you know how accurate it is without you having to measure it with a meter.
So,..... if unsure about whether you want to push it or not, grab a meter and find which of the 2% ones are actually within 1% or better. There will definately be some.
Oh, and BTW the difference between 1% and 2% is very unlikely to hurt your circuit, remember that a lot of components you are putting in their probably only have an accuracy of 5% or even 10%. In a project like the Soundlab 1% resistors are mostly used to control the accuracy of CV tracking etc. and are not holding the expensive smoke in!! Laughing

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Etaoin



Joined: Jun 30, 2005
Posts: 760
Location: Utrecht, NL

PostPosted: Thu Jan 26, 2006 1:34 am    Post subject: Reply with quote  Mark this post and the followings unread

Note though that there may be a difference in temperature behaviour between 1% resistors which are usually metal film and 2% resistors which are usually carbon. But yes, this is unlikely to matter for the SL.
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