T&L Publications

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 a...

Why not just take the easy and cheap way out?

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

- Rick

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 ...

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...

You might check out this project for ideas

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


- Rick

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...

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