Search found 7 matches

by RDL2004
Wed Jun 13, 2007 9:48 am
Forum: General Discussion
Topic: 4000 Series Databook
Replies: 3
Views: 1090

You can usually find these (used) on eBay or from used book sellers on Amazon Marketplace, normally for pretty reasonable prices. Just search on: "data book" +4000 I also know that TI has an online store where they still sell their TTL data book ($20 - new), they may have the 4000 series also - I do...
by RDL2004
Wed May 02, 2007 8:19 pm
Forum: General Discussion
Topic: "Mini-UPS" for wall wart
Replies: 12
Views: 3180

Why not just take the easy and cheap way out?

http://www.newegg.com/Product/Product.a ... 6842117003

- Rick
by RDL2004
Thu Mar 29, 2007 6:47 am
Forum: General Discussion
Topic: Anyone ever had a problem with Jameco?
Replies: 37
Views: 6864

I pretty much only order from Mouser, unless it’s something I can’t get from them. I almost feel bad sometimes about them taking my dinky little orders. Everything comes packaged so well and they almost always ship the same day as you order. I’m in Mississippi and they are in Texas, I usually ...
by RDL2004
Mon Mar 19, 2007 10:40 am
Forum: General Discussion
Topic: This month's cover project
Replies: 10
Views: 1824

I was curious as to why each meter has it's own power supply. I realize these digital meters need an isolated supply, but I thought that meant it only needed to be isolated from the circuit it is measuring to avoid ground loops. I would have thought that a single supply for all four meters would hav...
by RDL2004
Thu Sep 07, 2006 6:09 am
Forum: General Discussion
Topic: Car Digital Tach Display
Replies: 2
Views: 852

You might check out this project for ideas

http://members.shaw.ca/roma/fc.html


- Rick
by RDL2004
Mon May 15, 2006 1:17 pm
Forum: General Discussion
Topic: Digital Panel Meter Problem
Replies: 12
Views: 2051

You can't just tap the 9 VAC directly? I had a similar meter where I tried to use the rectified and filtered DC into a separate 5 volt regulator but it didn't work well. When I tapped into the raw AC out of the transformer, it worked okay. Also, Tamura makes some very small AC transformers you can g...
by RDL2004
Thu Oct 20, 2005 6:01 pm
Forum: General Discussion
Topic: which is the most popular magazine for audio DIYer?
Replies: 3
Views: 938

Re: which is the most popular magazine for audio DIYer?

Audio Express<p>AudioXpress<p>also check out DIYaudio.com<p>diyaudio.com