Re: High side driving N-channel Mosfet with PWM

Article View: sci.electronics.design

Article #1872

Back to sci.electronics.design Previous Next

#1872

From: Rich Grise
Date: Tue, 06 May 2008 20:22

19 lines
2061 bytes

On Mon, 05 May 2008 20:05:47 -0400, John Popelish wrote:
> Jamie wrote:
> 
>> 32 frames/Sec I believe is the minimum needed to prevent strobe flash in 
>> the human eye.. or some figure like that.
> 
> Fine for a stationary source you are staring at.  But all 
> you have to do is blink and you will see a trail of dots 
> (especially if the LED is very much brighter than its 
> surroundings) at 32 flashes per second, and a lot faster, 
> too.  If you haven't seen the effect, I suggest you try it.

It shows up on scrolling marquees very dramatically - when it's
scrolling, the letters look tilted, but I believe that's an artifact
of the strobing. If you move your eyes to follow the letters, they
square up.

Cheers!
Rich

Technical Details

Message-ID: <pan.2008.05.06.21.21.42.821422@example.net>

Path:

arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!border1.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!cyclone1.gnilink.net!spamkiller.gnilink.net!gnilink.net!trnddc03.POSTED!dd653b87!not-for-mail

References:

<481eee7b$0$17511$afc38c87@news.optusnet.com.au> <f0f3852b-d205-487f-af96-46f13a5953f3@m36g2000hse.googlegroups.com> <32da2152-008d-4970-8515-16295708323f@2g2000hsn.googlegroups.com> <s9MTj.40$wj3.23@newsfe06.lga> <hO6dndQVgrcNPYLVnZ2dnUVZ_ovinZ2d@comcast.com>

Show Full Headers

Complete Article Headers

X-Google-Thread: 112d1e,23a05bb8461714c3
X-Google-Thread: 103407,23a05bb8461714c3
X-Google-Attributes: gid112d1e,gid103407,domainid0,public,usenet
X-Google-Language: ENGLISH,ASCII-7-bit
Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!border1.nntp.dca.giganews.com!border2.nntp.dca.giganews.com!nntp.giganews.com!cyclone1.gnilink.net!spamkiller.gnilink.net!gnilink.net!trnddc03.POSTED!dd653b87!not-for-mail
From: Rich Grise <rich@example.net>
Subject: Re: High side driving N-channel Mosfet with PWM
User-Agent: Pan/0.14.2.91 (As She Crawled Across the Table)
Message-ID: <pan.2008.05.06.21.21.42.821422@example.net>
Newsgroups: sci.electronics.design,aus.electronics
References: <481eee7b$0$17511$afc38c87@news.optusnet.com.au> <f0f3852b-d205-487f-af96-46f13a5953f3@m36g2000hse.googlegroups.com> <32da2152-008d-4970-8515-16295708323f@2g2000hsn.googlegroups.com> <s9MTj.40$wj3.23@newsfe06.lga> <hO6dndQVgrcNPYLVnZ2dnUVZ_ovinZ2d@comcast.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Lines: 21
Date: Tue, 06 May 2008 20:22:56 GMT
NNTP-Posting-Host: 71.119.122.152
X-Complaints-To: abuse@verizon.net
X-Trace: trnddc03 1210105376 71.119.122.152 (Tue, 06 May 2008 16:22:56 EDT)
NNTP-Posting-Date: Tue, 06 May 2008 16:22:56 EDT
X-Original-Bytes: 1860

Reply to Parent Message