Avionics Buses

I added a new page today to cover the PI-Bus. The PI-Bus was already listed on the site but only in passing because I really didn't have much data. I still haven't added much to the page, but it's more than I had before and a bit much to leave on the Avionics Data Buses page. I also added a new link to PI-Bus off the interface buses page 'P', data had already been listed there.

Even though I only added a few sentences more than the site already listed, it took 3 hours. As I uncovered data that needed to be added to related pages, so several pages were updated just because of the PI-Bus update. Oh and because I always start with a copy of another page to begin a new page; I updated and used the AFDX page to begin with.

Last week a page covering Laser Diode Manufacturers was added, but I never got around to adding the addition here. The search engines have already found that page but I mention it regardless. That page was linked of each of the other four Diode pages.

Graphic; F-22 Raptor, open source. The F-22 uses the PI-Bus.

Derating MIL Spec Resistors

The section on how to derate electronic components has now reached about 120 pages. The main location of Device Derating. A few sections go down two or three levels, but most pages reside just two levels down, with about 95 page just added in three months ago [Transistor Derating Curves].

The new pages cover derating curves for MIL Spec resistors. So far the pages do little more than hold a power derating curve, but with all new page additions that will change in a few days.

MIL SPEC Derating Curves:
MIL-R-30095,
MIL-R-39005,
MIL-R-39007,
MIL-R-39008,
MIL-R-39009,
MIL-R-39015,
MIL-R-39017,
MIL-R-55182,
MIL-R-83401,

All of the new pages are liked off the (now) main Resistor Derating page.
Related pages include;
How to Derate Resistor Networks,
Potentiometer Derating Guidelines,
Wire Wound Potentiometer Derating Curves,

Of course all the pages link to vendors that Manufacture Resistors.
Note; the graphics which depict the curves are not the best quality, but the are readable.

D-Sub Connector Insert Arragenments

There are a number of pages that deal with D Sub-miniature connectors on the engineering web site. The main two are Manufacturers of Commercial D-Sub Connectors, and Manufacturers of Military D-Sub Connectors. Military connectors meet the MIL-DTL-24308 specification.

A graphic of a D-Subminiature outline, and a table of D-Sub mechanical dimensions is provided to determine the different sizes available. Along with a new page providing Insert Arrangements for D-sub connectors.

9-pin D-Sub Insert Arrangements,
15-pin D-Sub Insert Arrangements, Size 22 Contacts.
15-pin D-Sub Insert Arrangements, Size 20 Contacts.
25-pin D-Sub Insert Arrangements,
26-pin D-Sub Insert Arrangements,
37-pin D-Sub Insert Arrangements,
44-pin D-Sub Insert Arrangements,
50-pin D-Sub Insert Arrangements,
62-pin D-Sub Insert Arrangements,
78-pin D-Sub Insert Arrangements,
104-pin D-Sub Insert Arrangements.

So the Insert Arrangements for D-subs gives the dimensions and locations of the individual pins, while the Dimensional outline for D-subs gives the case out-line. In addition, you can determine the pin location or pin numbering using the 'insert arrangement' pages.

Although in declining usage on PC's the three most common sizes used are the 9-pin [Serial Port], the 15-pin [Video Port], and the 25-pin [Parallel Port].

A related page, general listing of Manufacturers of Military Grade Connectors.

Locking Connector Types

A new page was added to hold a graphic for a Bayonet style locking connector. The page is linked off the page covering the definition of a BNC Connector. A small definition is also provided. Both pages are part of the Definition of Radar Terms section.

Also added a graphic holding page to cover the definition of Terminal Lugs. The Terminal Lugs diagrams reside in the Engineering Glossary of Terms section.
In addition to the pictures referenced above a few others were added to pre-existing pages. A few additional entries were also added to the Definition of Resistor Terms section, but no new pages added.

I also moved the Balun Definition to its own page as the definition was being duplicated on three other pages. The new page covering Baluns is linked from a number of pages including the Antenna Terms section, and Engineering Dictionary section. Of course each of the new pages have been added to the site-map, linked of the index page.

Circular Connector Manufacturers

Finally added some text to the Sealed Circular Connector page located on interfacebus.net. The page was created a few months back... So far the page is a collection of links to pages that list manufacturers that produce round connectors on interfacebus.com.

The listing groups all the different pages into one list, which should make round connectors easier to locate.

Looks like the web site could use a few more pages dealing with Military Spec connectors.

GPIB Connector Diagrams, Mechanical Drawings

Several pages have been added to hold military CID [Commercial Interface Document] paper mechanical drawings for the IEEE-488 connector, GPIB [General Purpose Interface Connector].

The main link is off the top level HPIB Description page, to IEEE488 CID Mechanical Drawings. Here are the new pages, that carry the CID drawings:
A-A-55094,
A-A-55138,
A-A-55139,
A-A-55140,
A-A-55141,
A-A-55144,
A-A-55145,
A-A-55146.

These page show the mechanical drawing for the connector, and provide no other data other than the specification title. The purpose of the page is to hold the connector picture or gif and that's it.
The page addition to the site map is coming soon.

Military Specifications Resource

Some content has been removed by the editor.... The page is meant to document a number of common Mil Spec document numbers and their title. It's really just a place holder to contain the information. Put a few new graphic files up at the same time. Also linked to the the main pages for MIL resistors standards and MIL capacitor standard pages on interfacebus.com. Seems like a good start for the page....

On www.interfacebus.com, I added the GVIF description page. The GVIF [Gigabit Video InterFace] bus has been released sense 1997, but, it's news to me. Looks like a Sony only interface bus.

I added a holding page, so I should get back to it soon, I hope.

MIL-STD-100

MIL-STD-100, Engineering Drawing Practices. The specification was released in 1965, and upgraded over the years until revision 'G'. The MIL-STD-100G lasted until 2001 when it was canceled with no replacement. Well, no government replacement; use ASME Y14.xx, don't clam MIL-STD-100 unless you have to. MIL-STD-100 was also called DOD-STD-100.

So, a page was added to detail the history of MIL-STD-100 over the years before MIL-STD-100 was canceled, followed by a number of pages that provide Dictionary terms relating to MIL-STD-100.

List of Dictionary Terms for MIL-STD-100:

MIL-STD-100G, A Terms,
MIL-STD-100G, B Terms,
MIL-STD-100G, C Terms,
MIL-STD-100G, D Terms,
MIL-STD-100G, E Terms,
MIL-STD-100G, M Terms,
MIL-STD-100G, N Terms,
MIL-STD-100G, O Terms,
MIL-STD-100G, P Terms,
MIL-STD-100G, Q Terms,
MIL-STD-100G, S Terms,

Some letter definitions are combined, so check the previous entire. The main listing is provided off the Military Specifications page.

VME Mechanical Interface

I added two pages to cover the mechanical standards for the VME interface. The first page covers the new mechanical specification that deals with the VPX card format; REDI, Ruggedized Enhanced Design Implementation Form Factors. While the second page addresses the original VME form function, IEEE-1011.

The IEEE1101 page was added just for completeness and currently only points to a mechanical drawing of the VME board sizes that have been on the site for a number of years now.

The REDI standard defines the new direction with the VME bus, using the VPX card. The VME road map is moving in a new direction leaving the old legacy form factors behind.

COTS Manufacturers:
..... Manufacturers of VME Boards.
..... Manufacturers of VPX Boards.
..... Manufacturers of VXS Boards.

Military Standard 1399 Description

I added a page that describes MIL-STD-1399 specification. The page provides Alternating Current, Electrical Power Types. The addition of the MIL1399 page compliments the Naval Use Environmental standard; MIL-HDBK-217 page.

The Military Standard 1399 page details the three types of electrical power supplied on Navy ships; Type I, Type II, and Type III.

Other Military specifications and Handbooks may be found on the Military Specifications page.
Because of a typo this blog post was updated on 3/1/2011.
.....

MIL-HDBK-217F Environments

Military Handbook 217 [MIL-HDBK-217]; Reliability Prediction of Electronic Equipment provides a means to calculate the reliability of systems based on the components used with in the system.

The definition for Mean Time Between Failure (MTBF) from MIL-HDBK-217F is located on the MTBF Definition page. The MTBF page contains its main link off the Engineering Dictionary page or Electronic acronyms page.

MIL-HDBK-217 provides for a number of Environments in which equipment may be operated in, the new pages added list the different types of Environments:

Ground Systems Environments,
Naval Systems Environments,
Airborne Systems Environments,
Space Systems Environments.

Each Environment definition contains a number of sub-Environments, with each page describing the terms and definition. A related page lists Military Specifications.

Military Connector Specificatins

I added a new page to cover the insert arrangements for MIL 83513 connectors. The following link provides MIL83513 Pin locations. It's linked off the main MIL-DTL-83513 page that was added a while ago, but never updated. I did add a few words to the MIL-DTL-83513 page tonight, but just in passing, it's off the Military Connector specification page. I also added a page that covers MIL-83513 insert arrangements. I noticed that the MIL-DTL-32139 is out-of-date. Both of these Mil standard pages were just copies of the MIL D-sub manufacturers page, at MIL-C-24308. So I updated MIL32139 and added a page for part numbers and insert arrangemets.

Here is the listing of the main page for Manufacturers of Military Connectors. And the main page of Manufacturers of Connectors.

microUSB Interface

Added the Micro-USB interface page. Micro-USB is designed to replace the Mini-USB style connectors called out in the USB specification. Micro-USB is smaller than those of Mini-USB and are designed to fit on Cell phones and other mobile devices.

Added a page to cover Military Micro-D Sub connectors, MIL-DTL-83513. However, it's a blank page so it turns up in the site map being generated tonight. The MIL-DTL-83513 is added to the list of pages requiring update, and will be up-dated when time allows. Also added the MIL-DTL-32139 connectors page, same reason.

The main Military Connector Manufacturers page, Military D-sub Connector manufacturers page

MIL-PRF-24758

There's not much there yet, but I added a page to cover MIL-PRF-24758. It's a military standard that specifies ship-board flexible weatherproof conduit. The page is listed under MIL-PRF-24758.