Monday, March 22, 2010

Capacitor Characteristics

A new page providing a graph of Altitude vs Capacitor Operating voltage was added. Of course it shows the capacitor case sizes which kind of also define the operating voltage. A small amount of text was also added to support the chart, but it's not much additional data yet.

Another new page was added to address Capacitor Insertion Loss. The Insertion Loss page is linked off the capacitor dictionary page starting with the Impedance Definition. This page has even less text than the other new page, but this always changes over time. The interesting thing is that the site analytics does not even show any page views yet, and I generated this page three days ago.

I also added both capacitor pages to the engineering site-map, keeping that page up to date. The site map lists all the pages contained on the Engineering Web-Site. I also found a few duplicate entries in the site map, so those got deleted, and I also added a bit of supporting text to some of the page listings.

So it appears that the capacitor dictionary section contains 19 pages, with some number of supporting pages. Of course there is also a number of pages that discuss characteristics of capacitors, sizes, MIL Spec, tolerance and so on.

Sunday, March 21, 2010

555 Circuit Diagrams

Yet another 555 schematic was added yesterday. Another Astable Multivibrator 555 circuit, linked off the main 555 Timer Introduction page. This one uses to different circuit paths two charge and discharge the timing capacitor.

I've been calling the listing a Individual Pulse Width Adjustment circuit, but maybe a High-Low Pulse Width Adjustment circuit would be better. At any rate it's a variation of an Astable 555 configuration, but with each of these circuit additions it has more and more circuit elements.

I just generated this schematic graphic, but I think I have one other, so I may yet start another related page address ~ about another 555 circuit.

The next post will be about Capacitor stuff, because I added two other pages the other day but have yet to blog about them.