Search found 33 matches

by Hello
Mon Feb 11, 2008 1:15 pm
Forum: Up For Grabs
Topic: CD4000 Data Book
Replies: 11
Views: 6547

Data Books

XRay: Sorry to be so long in getting back to you on the books. Just been leting this simmer for a while, messing with other things. I was thinking about EXAR, because I've got a few 2242 chips, but I'm looking at the Intersil ICM7242 now. I would like to find some 2005 & 2006 Nuts & Volts mags, thou...
by Hello
Fri Jan 25, 2008 11:45 am
Forum: Up For Grabs
Topic: CD4000 Data Book
Replies: 11
Views: 6547

Not Yet

X-Ray:

Haven't gotten one yet.

You wouldn't happen to have a book on EXAR integrated circuits, too, would you?

Thanks for the reply!
by Hello
Mon Jan 21, 2008 1:31 pm
Forum: General Discussion
Topic: 6v battery indicator
Replies: 13
Views: 3654

LM3914 Circuit

http://www.uoguelph.ca/~antoon/circ/batmon12.htm Here's a link to a 12V Lead-Acid Monitor using the LM3914, which easily could be adapted to your application. The LM3914 has the feature of a handy internal voltage reference, and is simple to apply. Also, in addition to the fact that the indicator LE...
by Hello
Mon Jan 21, 2008 1:04 pm
Forum: General Discussion
Topic: PCB Software
Replies: 10
Views: 2970

Heat Mat Control

Bodgy: For the ap I was considering, the control would apply power to the heat mat between a temp of perhaps 45F and approximately 82-85F. If the temp rose more than 10F above the max temp, an output would be latched to activate audio/visual alarms (piezo/flashing LED's or xenon). Of course, the sen...
by Hello
Mon Jan 21, 2008 6:14 am
Forum: Up For Grabs
Topic: CD4000 Data Book
Replies: 11
Views: 6547

Thanks

Sherlock,

Thanks for the response; sorry for the delay in getting back to you.

What do you want for it?

I'm not collecting them, just wanted to browse over some data sheets/ap notes without being at the computer.
by Hello
Thu Jan 10, 2008 10:52 am
Forum: General Discussion
Topic: PCB Software
Replies: 10
Views: 2970

Climate Controller

Colin:

I was just browsing over your climate controller. It looks kind of interesting.
I have a 200 W (120VAC) heat mat I've been thinking of using. It has no control, just heats up (resistance wire in a thin mat).
Have you actually put your control to use?

Thanks.
by Hello
Thu Jan 10, 2008 10:24 am
Forum: Up For Grabs
Topic: CD4000 Data Book
Replies: 11
Views: 6547

Whole Book

I thought maybe someone would have the whole book. I would like to browse it. Thanks.
by Hello
Tue Jan 08, 2008 2:04 pm
Forum: Up For Grabs
Topic: CD4000 Data Book
Replies: 11
Views: 6547

CD4000 Data Book

Does anyone have a National Semiconductor 4000 series CMOS data book? Thanks!
by Hello
Tue Jan 01, 2008 11:18 am
Forum: General Discussion
Topic: PCB Software
Replies: 10
Views: 2970

PCB Software

Does anyone know of a decent piece of software to draw pc-board layouts that will run under Windows 98SE? I'm interested in single-sided, through-hole, with DIP and common transistor patterns. Everything I've seen in the past is not practical, too cumbersome to use, requires switching to another scr...
by Hello
Tue Jan 01, 2008 11:07 am
Forum: General Discussion
Topic: Cold Heat Soldering Iron, the Verdict is in...
Replies: 24
Views: 5156

Bought Out?

Seems like I saw that Weller had bought out the rights to ColdHeat. My guess is they weren't interested in the design, just trying to eliminate some marketing competition. I've been fiddling around with a battery-operated iron I got at that paragon of parts distributors, R-S. It's too weak for much ...
by Hello
Mon Oct 22, 2007 10:54 am
Forum: General Discussion
Topic: Cold Heat Pro
Replies: 9
Views: 2067

Thanks

Thanks to all for the good feedback on the Cold Heat Pro. It's kind of what I was thinking, I guess -- an interesting notion, but maybe not quite ready for prime time, at least not on pc boards and such.
by Hello
Fri Oct 19, 2007 9:55 am
Forum: Up For Grabs
Topic: EXAR-2243
Replies: 0
Views: 1756

EXAR-2243

Does anyone have a couple of EXAR-2243 chips I could purchase from you?

Thanks!
by Hello
Tue Oct 16, 2007 4:43 pm
Forum: General Discussion
Topic: Cold Heat Pro
Replies: 9
Views: 2067

Cold Heat Pro

Has anyone used the Cold Heat Pro soldering iron? Any feedback? Thanks!
by Hello
Tue Sep 18, 2007 2:26 pm
Forum: Up For Grabs
Topic: Power Supply for IBM 300PL
Replies: 2
Views: 1919

Power Supply for IBM 300PL

I need a power supply for an IBM 300 PL pentium II 333Mhz desktop, 150 watts total.
Does anyone have a good working one, or know of a possible source?

Thanks!
by Hello
Mon Jun 11, 2007 5:57 am
Forum: General Discussion
Topic: Low-Leakage Electrolytics
Replies: 0
Views: 1086

Low-Leakage Electrolytics

I am looking for (new) low-leakage electrolytic capacitors, 470uF (16-volt and up), with leakage values specified.
Also, I would like to find a good source for low-ESR electrolytics, up to 100uF.