Search found 525 matches

by sofaspud
Tue Jan 08, 2013 2:51 am
Forum: Lost and Found
Topic: Bryan Bergeron tube preamp
Replies: 2
Views: 2641

Re: Bryan Bergeron tube preamp

Did you find it?
I think it is the June 2008 issue.
by sofaspud
Sat Nov 10, 2012 2:28 am
Forum: General Discussion
Topic: UPS has to see AC before providing backup
Replies: 6
Views: 1671

Re: UPS has to see AC before providing backup

What model UPS do you have? I have a couple of APC units from the 250/400/600 line. They were "orphaned" due to a hardware upgrade so I gave them a new home. I've never used them, but was able to obtain schematics at the time. A quick look suggests that a simulated "AC Fail" signal(s) might fool it ...
by sofaspud
Tue Nov 06, 2012 12:20 am
Forum: Reader Projects
Topic: ReUsing Power Wart Devicer Connectors
Replies: 5
Views: 3915

Re: ReUsing Power Wart Devicer Connectors

Way back when I needed a plug for my portable cassette player, Radio Shack had the right size. I just don't recall what size it is. They weren't part of the Adaptaplug sets, but were packaged in pairs. Places like All Electronics, Marlin P. Jones, or BG Micro often have good discounts on wall warts ...
by sofaspud
Thu Oct 18, 2012 4:05 am
Forum: General Discussion
Topic: WHERE ARE THEY?
Replies: 32
Views: 6232

Re: WHERE ARE THEY?

I believe you're thinking of Popular Electronics. If I recall correctly, this was back in the mid-80's when Ziff-Davis still owned PE. It then folded, much of the editorial staff founded the new "Modern Electronics" magazine, and Gernsback later revived PE as sort of a slightly-less-technical sister...
by sofaspud
Fri Jun 22, 2012 3:50 am
Forum: General Discussion
Topic: Magnet in conductive media...
Replies: 21
Views: 5100

Re: Magnet in conductive media...

Hmmm..... I'll have to ask Eli the ice man.
by sofaspud
Mon Nov 21, 2011 12:48 pm
Forum: General Discussion
Topic: 4 bulb trick and...........
Replies: 13
Views: 3506

Re: 4 bulb trick and...........

Couldn't get it to work? Do you mean GSview also?
I open the pdf in GSview, select Convert from the File pulldown, select the format and resolution, and the pages to convert. Click OK and then enter the output file details (name & location). Done.
by sofaspud
Fri Nov 18, 2011 9:57 pm
Forum: General Discussion
Topic: 4 bulb trick and...........
Replies: 13
Views: 3506

Re: 4 bulb trick and...........

dacflyer wrote:well i tried to upload the pictures, but discovered that my friend scanned my pages into a PDF file. and there is no way to save it as a image.
There is a way... you need Ghostscript. GSview32.exe will let you save virtually any pdf as a common graphics file.
by sofaspud
Sun Oct 02, 2011 12:35 am
Forum: General Discussion
Topic: Starting a project, solar powered night light
Replies: 29
Views: 5598

Re: Starting a project

But I'm beginning to wonder if I should be designing this around the solar cell instead of the LED???? Or should it be battery voltage??? I almost posted yesterday... will the circuit be designed for the power supply or the power supply for the circuit? I now reiterate my previous suggestion. Find ...
by sofaspud
Fri Sep 30, 2011 1:20 pm
Forum: General Discussion
Topic: Starting a project, solar powered night light
Replies: 29
Views: 5598

Re: Starting a project

You may want different amounts of light for the different areas. What you could do is get a 5 or 6 volt battery and a 100 ohm or larger potentiometer and test various LED output levels in those areas. Record the data to use in the design.
by sofaspud
Fri Sep 30, 2011 12:21 am
Forum: General Discussion
Topic: Starting a project, solar powered night light
Replies: 29
Views: 5598

Re: Starting a project

3 amps times 8 hours is 24 amp/hours. That isn't truly realistic though. For example, if you want no less than 30% discharge then you would need a ~72Ah battery. That's for 1 night's use. You've chosen lithium-ion or nickel metal hydride cell technology. A quick look at Digi-Key showed some 12V 3.2A...
by sofaspud
Thu Sep 29, 2011 3:56 am
Forum: General Discussion
Topic: Starting a project, solar powered night light
Replies: 29
Views: 5598

Re: Starting a project

Hmmm... is there something more about this application we should know? You say, "24 hour capacity in case of a cloudy day, no 110v back-up needed." Do you need a nightlight on a cloudy day? You can read the newspaper at 3AM with 12 LEDs. I was thinking this was a hallway/foyer/path to the bathroom-t...
by sofaspud
Wed Sep 28, 2011 12:09 am
Forum: General Discussion
Topic: Starting a project, solar powered night light
Replies: 29
Views: 5598

Re: Starting a project

Sure! Probably the first step would be to determine how much light and run time you want, and choose the LED(s). White LEDs will brighten the path, but red will be easier on sleepy eyes.
by sofaspud
Sun Sep 25, 2011 11:51 pm
Forum: General Discussion
Topic: Flexible Coating Needed
Replies: 6
Views: 2100

Re: Flexible Coating Needed

That's the direction I was thinking... a costume&makeup or magician's supply company.
by sofaspud
Sun Jun 19, 2011 11:06 am
Forum: General Discussion
Topic: things goin' on at RS
Replies: 8
Views: 1586

Re: things goin' on at RS

Yeah, y'all are reminding me of the small town Sears catalog stores. An old idea new again?
Wasn't the RS service with its own catalog called TechAmerica? I still have a catalog or two around here. It lasted a few years
in the late 90s but succumbed to the web and RS's move to cell phones.