Difference between revisions of "User talk:RogerAF"

From OpenCircuits
Jump to navigation Jump to search
(restore comment added by RogerAF 13:09, 9 July 2007)
Line 1: Line 1:
Aloha from Honolulu,
+
[http://wc1.worldcrossing.com/WebX/.1de60a16 levitra] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=819 qwest ringtones] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=817 free mp3 ringtones] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=124 samsung ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=15&tid=3764 real ringtones] [http://wc1.worldcrossing.com/WebX/.1de609f1 cheap lortab] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=70 alltel ringtones] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30324 online hoodia] [http://wc1.worldcrossing.com/WebX/.1de60a36 cheap zyban] [http://students.hsc.unt.edu/housing/item.cfm?type=2863 alprazolam online] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=71 cheap wellbutrin] [http://wc1.worldcrossing.com/WebX/.1de60a10 didrex online] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=15&tid=3768 free sagem ringtones] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=108 nexium online] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=191 lorazepam online] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30260 cheap clonazepam] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=59 meridia online] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30349 free cingular ringtones] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=93 free midi ringtones] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=42 cheap meridia] [http://wc1.worldcrossing.com/WebX/.1de60a0e celexa online] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=81 cheap lisinopril] [http://wc1.worldcrossing.com/WebX/.1de60a27 but sildenafil] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=103 mono ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=15&tid=3772 midi ringtones] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=73 nexium online] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=70 nokia ringtones] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30241 xanax online] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30283 buy didrex] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=231 order rivotril] [http://library.cshl.edu/wp/vb/member.php?u=1377 free samsung ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=5&tid=3713 cheap tenuate] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=38 diazepam online] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=91 diethylpropion online] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=147 zoloft online] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=102 midi ringtones] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=207 xanax online] [http://www.colorado.edu/studentgroups/backcountryclub/blahdocs/uploads/propecia_2137.htm propecia online] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=15&tid=3748 cyclobenzaprine online] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=225 free wwe ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=5&tid=3722 qwest ringtones] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=91 free music ringtones] [http://students.hsc.unt.edu/housing/item.cfm?type=2874 cheap ultracet] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=86 sonyericsson ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=5&tid=3718 cheap hoodia] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=5&tid=3728 sonyericsson ringtones] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30331 free ringtones] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30252 meridia online] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30356 cool ringtones] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=765 phentermine online] [http://library.cshl.edu/wp/vb/member.php?u=1351 adipex online] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30262 paxil online] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=160 adipex online] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=98 mtv ringtones] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=121 wwe ringtones] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30230 cheap tramadol] [http://wc1.worldcrossing.com/WebX/.1de60a22 cheap phentermine] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=86 cheap ortho] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=34 norco online] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=208 phentermine online] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=215 zoloft online] [http://wc1.worldcrossing.com/WebX/.1de609db but adipex] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=47 but clonazepam] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=76 didrex online] [http://library.cshl.edu/wp/vb/member.php?u=1372 free mp3 ringtones] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=794 online clomid] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=808 rivotril online] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=89 alltel ringtones] [http://library.cshl.edu/wp/vb/member.php?u=1371 funny ringtones] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=114 pharmacy online online] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=781 online levitra] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=79 free samsung ringtones] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=842 free mtv ringtones] [http://www.colorado.edu/studentgroups/backcountryclub/blahdocs/uploads/viagra_2557.htm cheap viagra] [http://students.hsc.unt.edu/housing/item.cfm?type=2866 cheap levitra] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=229 cheap valium] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=777 vicodin online] [http://library.cshl.edu/wp/vb/member.php?u=1340 cheap soma] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=233 sonyericsson ringtones] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=85 free sagem ringtones] [http://wc1.worldcrossing.com/WebX/.1de609f9 norco online] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30238 cheap phentermine] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=784 buy lorazepam] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=805 zanaflex online] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=187 free kyocera ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=5&tid=3731 free sharp ringtones] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=212 propecia online] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30357 free sharp ringtones] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=237 samsung ringtones] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=50 buy prozac] [http://library.cshl.edu/wp/vb/member.php?u=1341 valium online] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=197 mp3 ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=15&tid=3760 zyban online] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=115 free mono ringtones] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=85 ericsson ringtones] [http://wc1.worldcrossing.com/WebX/.1de609e6 cyclobenzaprine online] [http://library.cshl.edu/wp/vb/member.php?u=1383 sagem ringtones] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=100 funny ringtones] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=31 cheap viagra] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=71 buy alprazolam] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=105 mp3 ringtones] [http://students.hsc.unt.edu/housing/item.cfm?type=2884 cheap celexa] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=33 cheap phentermine] [http://students.hsc.unt.edu/housing/item.cfm?type=2900 free funny ringtones] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=96 cheap levitra] [http://library.cshl.edu/wp/vb/member.php?u=1339 cheap tramadol] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=51 sildenafil online] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=54 cheap wellbutrin] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30269 cheap wellbutrin] [http://library.cshl.edu/wp/vb/member.php?u=1360 cheap lorazepam] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=73 zanaflex online] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=802 pharmacy online online] [http://students.hsc.unt.edu/housing/item.cfm?type=2861 cheap norco] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=60 adipex online] [http://wc1.worldcrossing.com/WebX/.1de609ff free real ringtones] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=75 propecia online] [http://wc1.worldcrossing.com/WebX/.1de609ee hydrocodone] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=241 sony ericsson ringtones] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=122 kyocera ringtones] [http://library.cshl.edu/wp/vb/member.php?u=1367 didrex online] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30338 motorola ringtones] [http://students.hsc.unt.edu/housing/item.cfm?type=2859 meridia online] [http://students.hsc.unt.edu/housing/item.cfm?type=2857 ativan online] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=57 buy propecia] [http://wc1.worldcrossing.com/WebX/.1de60a13 cheap fioricet] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=123 sagem ringtones] [http://library.cshl.edu/wp/vb/member.php?u=1357 levitra online] [http://students.hsc.unt.edu/housing/item.cfm?type=2851 carisoprodol online] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=42 cheap lorazepam] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=186 jazz ringtones] [http://students.hsc.unt.edu/housing/item.cfm?type=2915 mono ringtones] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=232 sony ringtones] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=81 free ringtones] [http://wc1.worldcrossing.com/WebX/.1de609fa online pharmacy] [http://wc1.worldcrossing.com/WebX/.1de609e1 cheap carisoprodol] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30314 buy pharmacy online] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=219 cheap viagra] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30337 real ringtones] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=90 punk ringtones] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30363 sony ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=5&tid=3704 lorazepam online] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=58 cheap didrex] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=75 qwest ringtones] [http://students.hsc.unt.edu/housing/item.cfm?type=2917 free punk ringtones] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=146 buy zanaflex] [http://library.cshl.edu/wp/vb/member.php?u=1387 alltel ringtones] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=104 free real ringtones] [http://library.cshl.edu/wp/vb/member.php?u=1352 norco online] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=787 cheap cyclobenzaprine] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=190 cheap lisinopril] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=167 carisoprodol online] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=124 free ericsson ringtones] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=79 buy zyban] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=217 punk ringtones] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=49 phentermine online] [http://students.hsc.unt.edu/housing/item.cfm?type=2881 cheap lisinopril] [http://wc1.worldcrossing.com/WebX/.1de60a0a vicodin online] [http://students.hsc.unt.edu/housing/item.cfm?type=2911 free cingular ringtones] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=63 zanaflex online] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=78 cheap sildenafil] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=764 cheap valium] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=62 cheap vigrx] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=111 norco online] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=82 zoloft online] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=70 pharmacy online] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=53 albuterol online] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=5&tid=3726 free verizon ringtones] [http://wc1.worldcrossing.com/WebX/.1de60a19 free mp3 ringtones] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=786 wellbutrin online] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=824 free music ringtones] [http://www4.nau.edu/fera/index.asp?sub=show&action=posts&fid=4&tid=75 but rivotril] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=69 lorazepam online] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=117 free punk ringtones] [http://www.colorado.edu/studentgroups/backcountryclub/blahdocs/uploads/wellbutrin_1082.htm wellbutrin online] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=5&tid=3724 free sprint ringtones] [http://wc1.worldcrossing.com/WebX/.1de609e7 cheap diazepam] [http://www.e.kth.se/cgi-bin/esekt/discussion?command=read&discussionid=4&id=30240 cheap carisoprodol] [http://www.ees.ufl.edu/alumni/forums.asp?ForumId=5&TopicId=107 music ringtones] [http://students.hsc.unt.edu/housing/item.cfm?type=2873 cheap nexium] [http://students.hsc.unt.edu/housing/item.cfm?type=2887 pharmacy online online] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=89 order vigrx] [http://students.hsc.unt.edu/housing/item.cfm?type=2890 zanaflex] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=180 online flexeril] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=201 nextel ringtones] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=38 paxil online] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=811 cheap hoodia] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=113 free sonyericsson ringtones] [http://students.hsc.unt.edu/housing/item.cfm?type=2848 soma online] [http://www.colorado.edu/studentgroups/backcountryclub/blahdocs/uploads/realringtones_1857.htm free real ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=15&tid=3756 cheap lortab] [http://ae.siam.edu/forums/toast.asp?sub=show&action=posts&fid=2&tid=81 music ringtones] [http://itcweb.ecsu.edu/portal/forums.asp?ForumId=13&TopicId=198 mtv ringtones] [http://library.cshl.edu/wp/vb/member.php?u=1355 but clonazepam] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=103 qwest ringtones] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=15&tid=3751 buy sildenafil] [http://wc1.worldcrossing.com/WebX/.1de60a29 buy tramadol] [http://www.ovu.edu/community/toast.asp?sub=show&action=posts&fid=5&tid=3702 buy paxil] [http://kc.vanderbilt.edu/forums/toast.asp?sub=show&action=posts&fid=5&tid=95 cheap hoodia] [http://wc1.worldcrossing.com/WebX/.1de60a04 sonyericsson ringtones] [http://www.aswsu-ddp.wsu.edu/toast/forums.asp?sub=show&action=posts&fid=3&tid=793 sildenafil online] Aloha from Honolulu,
 
I have several areas of interest.  I've been servicing recording studios here in honolulu, since the late '80s.  Also concert sound, video projection, and theatrical lighting systems.  I play electric rock-blues guitar and know what guitar players want from their Marshall amps.  And I do recording engineering and production, so I know what recording engineers need from their monitor amps and speakers.
 
I have several areas of interest.  I've been servicing recording studios here in honolulu, since the late '80s.  Also concert sound, video projection, and theatrical lighting systems.  I play electric rock-blues guitar and know what guitar players want from their Marshall amps.  And I do recording engineering and production, so I know what recording engineers need from their monitor amps and speakers.
  
Line 31: Line 31:
  
 
Have you seen [http://romanblack.com/smps/a04.htm The 3-transistor Black regulator]?
 
Have you seen [http://romanblack.com/smps/a04.htm The 3-transistor Black regulator]?
Or the [http://romanblack.com/smps/conv.htm +5v to +13v Converter] also by Roman Black?
+
Or the [http://romanblack.com/smps/conv.htm 5v to 13v Converter] also by Roman Black?
 
It makes me wonder why I used to think switchmode regulators required a complicated IC to control them.
 
It makes me wonder why I used to think switchmode regulators required a complicated IC to control them.
  
Line 46: Line 46:
 
I haven't done anything with switching regulators other than building my first with a TI TL494 PWM controller IC.  I looked at Roman Black's designs (Thanks for that turn on) what elegant simplicity!  I'm in awe.  I am happy to contribute to a linear regulators page--I have several discrete opamp based designs for dual tracking supplies etc.  I'd like to see more switching designs, to expand my own knowledge and raise my conciousness.  I've peeked at National's online design software, but never took the time to try anything.
 
I haven't done anything with switching regulators other than building my first with a TI TL494 PWM controller IC.  I looked at Roman Black's designs (Thanks for that turn on) what elegant simplicity!  I'm in awe.  I am happy to contribute to a linear regulators page--I have several discrete opamp based designs for dual tracking supplies etc.  I'd like to see more switching designs, to expand my own knowledge and raise my conciousness.  I've peeked at National's online design software, but never took the time to try anything.
  
I have a little project that requires +3V, +5V, and +&- 15V.  I'm trying out TI's 2W DC/DC converters: DCP020515, DCP020503, and TPS5430 Step Down Converter for that application, but it's on a back burner for a while.  If anyone has any experience with these I'd like to hear about it.
+
I have a little project that requires 3V, 5V, and
 
 
I've just been going through the documents I've downloaded and the samples I have on hand from Texas Instruments.  The more I think about it, the more a page for switching regulators makes sense.  I think it should be broken into different manufacturers offerings with a cross reference at the beginning or the end--assuming there is crossing.  There may be more differences than duplications--I don't know, so that is something to be researched.  This should be presented to the whole community for feedback.
 
 
 
[[User:RogerAF|RAF]] 00:28, 23 May 2007 (PDT)
 
 
 
----
 
 
 
I responded to your question on [[User talk:DavidCary]].
 
I responded there, rather than here, because the last time I put half of a conversation in one place, and the other half in another place, I only confused myself :-).
 
--[[User:DavidCary|DavidCary]] 10:22, 23 May 2007 (PDT)
 
 
 
== editing line drawings ==
 
 
 
For editing general line drawings,
 
the best editor I've found is "inkscape".
 
Download it for free ( http://inkscape.org/ ).
 
 
 
Some people use inkscape even for sketching schematics.
 
Other people prefer a specialized [[techniques#software_design_tools | schematic editor]].
 
 
 
Congratulations, you've already posted more images to Open Circuits than I have :-).
 
 
 
--[[User:DavidCary|DavidCary]] 12:51, 23 May 2007 (PDT)
 
 
 
== switching power supply design ==
 
 
 
[http://smps.us/ "SMPS switching power supply design: circuits, schematics, PCBs, electrical engineering reference, software, and other free online resources" ] edited by Lazar Rozenblat.
 
 
 
== writing on wiki ==
 
 
 
Some of my favorite pages about writing on wiki are:
 
 
 
* [http://communitywiki.org/SentenceToPageToSectionToWiki "sentence to page to section to wiki"]
 
* [http://communitywiki.org/BigBucketsFirstExplanation "big buckets first" explanation]
 
* [http://communitywiki.org/PlainTalk Plain Talk]
 
 
 
I'm dropping little snippets of information here, even though I plan to separate them out into another page someday.
 
The "sentence to page" and the "big buckets first" essays should explain why I do this, rather than creating a fresh page now and placing 2 snippets of information into it.
 
 
 
--[[User:68.0.120.35|68.0.120.35]] 20:54, 11 June 2007 (PDT)
 
 
 
----
 
 
 
'''Anonymous Edits'''
 
 
 
To who ever edited this page earlier.  You did no favors to anyone here.  You did not contribute anything.  You removed information that others spent time and thought composing and sharing with the community.  If you did this by accident, you owe it to yourself and everyone else (not only on this wiki, but on every wiki) to learn how to use the tools properly, so you don't damage things.
 
 
 
If you did this knowing what you do, then you are a malicious prankster and should be banned from the site.
 
 
 
I prefer to give you the benefit of the doubt, so in the future, be more careful.
 
 
 
[[User:RogerAF|RAF]] 06:09, 9 July 2007 (PDT)
 

Revision as of 18:49, 20 July 2007

levitra qwest ringtones free mp3 ringtones samsung ringtones real ringtones cheap lortab alltel ringtones online hoodia cheap zyban alprazolam online cheap wellbutrin didrex online free sagem ringtones nexium online lorazepam online cheap clonazepam meridia online free cingular ringtones free midi ringtones cheap meridia celexa online cheap lisinopril but sildenafil mono ringtones midi ringtones nexium online nokia ringtones xanax online buy didrex order rivotril free samsung ringtones cheap tenuate diazepam online diethylpropion online zoloft online midi ringtones xanax online propecia online cyclobenzaprine online free wwe ringtones qwest ringtones free music ringtones cheap ultracet sonyericsson ringtones cheap hoodia sonyericsson ringtones free ringtones meridia online cool ringtones phentermine online adipex online paxil online adipex online mtv ringtones wwe ringtones cheap tramadol cheap phentermine cheap ortho norco online phentermine online zoloft online but adipex but clonazepam didrex online free mp3 ringtones online clomid rivotril online alltel ringtones funny ringtones pharmacy online online online levitra free samsung ringtones free mtv ringtones cheap viagra cheap levitra cheap valium vicodin online cheap soma sonyericsson ringtones free sagem ringtones norco online cheap phentermine buy lorazepam zanaflex online free kyocera ringtones free sharp ringtones propecia online free sharp ringtones samsung ringtones buy prozac valium online mp3 ringtones zyban online free mono ringtones ericsson ringtones cyclobenzaprine online sagem ringtones funny ringtones cheap viagra buy alprazolam mp3 ringtones cheap celexa cheap phentermine free funny ringtones cheap levitra cheap tramadol sildenafil online cheap wellbutrin cheap wellbutrin cheap lorazepam zanaflex online pharmacy online online cheap norco adipex online free real ringtones propecia online hydrocodone sony ericsson ringtones kyocera ringtones didrex online motorola ringtones meridia online ativan online buy propecia cheap fioricet sagem ringtones levitra online carisoprodol online cheap lorazepam jazz ringtones mono ringtones sony ringtones free ringtones online pharmacy cheap carisoprodol buy pharmacy online cheap viagra real ringtones punk ringtones sony ringtones lorazepam online cheap didrex qwest ringtones free punk ringtones buy zanaflex alltel ringtones free real ringtones norco online cheap cyclobenzaprine cheap lisinopril carisoprodol online free ericsson ringtones buy zyban punk ringtones phentermine online cheap lisinopril vicodin online free cingular ringtones zanaflex online cheap sildenafil cheap valium cheap vigrx norco online zoloft online pharmacy online albuterol online free verizon ringtones free mp3 ringtones wellbutrin online free music ringtones but rivotril lorazepam online free punk ringtones wellbutrin online free sprint ringtones cheap diazepam cheap carisoprodol music ringtones cheap nexium pharmacy online online order vigrx zanaflex online flexeril nextel ringtones paxil online cheap hoodia free sonyericsson ringtones soma online free real ringtones cheap lortab music ringtones mtv ringtones but clonazepam qwest ringtones buy sildenafil buy tramadol buy paxil cheap hoodia sonyericsson ringtones sildenafil online Aloha from Honolulu, I have several areas of interest. I've been servicing recording studios here in honolulu, since the late '80s. Also concert sound, video projection, and theatrical lighting systems. I play electric rock-blues guitar and know what guitar players want from their Marshall amps. And I do recording engineering and production, so I know what recording engineers need from their monitor amps and speakers.

I have several projects I'm currently working on. And several ideas I want to develop ito new projects. I was thinking about some of those when I came across this site. It seems so serendipitous, I just had to join and write something.

I've spent the last week or so working on PC board layouts of several voltage regulator designs I've built and used over the years. I built a replacement for a recording console power supply regulator, that has been working now for near 10 years. I couldn't find the high current regulators that the original design used, so I used a pair of 723 ICs and external pass transistors and made my own substitute. The 723 has been bery bery goot to me! I used another pair of them to make a bench supply that adjusts from 12V to 35V plus and minus are individually adjustable and the pass devices have a 20A rating. I use this to experiment with various discrete op amp designs. A modern version of the Jensen 990 is my goal.

I've also recently built my first switchmode regulator based on TIs TL494 PWM controller IC. My experience with switching regulators is limited. I never had to repair one, only replace the complete unit, so I'm having to learn about them on my own. I've collected a lot of documentation and learned about buck, boost, buck-boost, fly-back etc. But it is all "book learning" as opposed to "hands on" at this point.

I thought these regulators might interest someone. I will post the schematics and artwork here eventually, but I need to find out more about how that is done. If anyone is interested, let me know.

Aloha, RAF

welcome

Aloha, RogerAF. Welcome to Open Circuits.

I hope you enjoy reading OpenCircuits and sharing your knowledge with us.

A few tips:

  • You can "sign" your contributions by typing four tildes "~~~~" at the end.
  • Be bold with your editing. If you add information that really belongs on some other page of this wiki (or on some other wiki entirely), or you accidentally delete some crucial stuff, it's fairly easy for anyone to fix it. Please feel free to revert or otherwise fix-up any of my edits that turn out to be erroneous and/or misguided.
  • We are all volunteers here.

Thank you for sharing your experiences here. I also have a bunch of "book learning" about switching regulators.

Have you seen National's "simple switcher"? The web application is nice for taking specifications like "up to 3 A output current", input voltage, and output voltage, and rapidly converting it to a circuit that National guarantees will work -- rather than fiddling around with prototypes for a few days.

Have you seen The 3-transistor Black regulator? Or the 5v to 13v Converter also by Roman Black? It makes me wonder why I used to think switchmode regulators required a complicated IC to control them.

Should we start a page on switching regulators here at Open Circuits?

--DavidCary 00:35, 18 May 2007 (PDT)



Hi David, In response to your question re a switching regulators page. I'd vote yea and expect that a linear page should be its partner. Given that the two types are so different in approach and conception. Linear regulators are very easy for me to understand, because of my years with audio equipment--most of which used linear supplies. Switching supplies are found in audio processing units, but the repair was generally to swap in a new card rather than trouble shoot for bad components.

I haven't done anything with switching regulators other than building my first with a TI TL494 PWM controller IC. I looked at Roman Black's designs (Thanks for that turn on) what elegant simplicity! I'm in awe. I am happy to contribute to a linear regulators page--I have several discrete opamp based designs for dual tracking supplies etc. I'd like to see more switching designs, to expand my own knowledge and raise my conciousness. I've peeked at National's online design software, but never took the time to try anything.

I have a little project that requires 3V, 5V, and