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Article #22700Re: Subsituting USB power for Battery?
From: Randa
Date: Wed, 08 Dec 2004 07:01
Date: Wed, 08 Dec 2004 07:01
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h1dd3n_h4m$73r@salmahayeksknockers.edu wrote: > I've got a battery powered peripheral (FM Transmitter) that I'd like > to power from USB. > > I know that USB puts out 5v, and that a "Double A" batter puts out > 1.2 v, and assume that two would put out the same. > > Can anyone point me in the right direction to make my little project? > I have a soldering gun, and can use it, but need an idea of what kind > of parts to put in between. > > Also, is there any danger that dicking around with a USB cable like > this could cause corruption elsewhere in the USB bus? You can overload the current capabilities of the USB bus on your motherboard and potentialy damage your board. One of the things you should determine before you get too excited is what the current requirements are for the FM transmitter. Then add in your other USB devices and see what your motherboard is willing to support. Now you know why there are active (powered) and passive(USB cable powered) USB external hubs.
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X-Google-Thread: 109a5e,ac837850bfb2f7bf X-Google-Attributes: gid109a5e,public X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news4.google.com!news.glorb.com!newsfeed-east.nntpserver.com!nntpserver.com!chi1.usenetserver.com!news.usenetserver.com!pd7cy2so!pd7cy1no!shaw.ca!pd7tw1no.POSTED!53ab2750!not-for-mail X-Trace-PostClient-IP: 68.150.80.57 From: "Randa" <no-mail@randa.randa> Newsgroups: sci.electronics,calgary.general References: <pivtd.1346$eb3.1331@clgrps13> Subject: Re: Subsituting USB power for Battery? Lines: 31 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1437 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 Message-ID: <HFxtd.438370$Pl.300978@pd7tw1no> Date: Wed, 08 Dec 2004 07:01:59 GMT NNTP-Posting-Host: 24.70.95.207 X-Complaints-To: abuse@shaw.ca X-Trace: pd7tw1no 1102489319 24.70.95.207 (Wed, 08 Dec 2004 00:01:59 MST) NNTP-Posting-Date: Wed, 08 Dec 2004 00:01:59 MST Organization: Shaw Residential Internet