Question by Paul Z: Electronics: What 74xx 5v logic is faster than 74″F”xx series?
I have an project where I’m encountering a speed threshold of some of my 74″F”xx logic and need to go a little faster. Is AHC or another logic family faster? Can someone give me a comparison breakdown of the fastest families in the 74xx series. Unfortunately I need to stay 5v for this application. Thanks!
Best answer:
Answer by laserguy1665
74LSxx series are high speed switching
Add your own answer in the comments!
Steven F. Udvar-Hazy Center: Space exhibit, models of early scientific satellites
Image by Chris Devers
Note that I have IMP-A noted twice. The satellites seem to be related, but while the one on the right margin seems to be a better match for the photo & description, the IMP-A could also be the on the top-middle edge. It could also maybe be the Satellite, IMP-E, Test Unit, but that one looks slight different, and moreover the Smithsonian site (last updated …when?) says that the IMP-E is not currently on public display in the first place.
• Explorer 1 satellite mock-up (Wikipedia)
• Explorer 6 satellite (Wikipedia)
• Explorer 7 satellite (Wikipedia)
• Explorer 8 satellite (Wikipedia)
• Explorer 10 satellite (Wikipedia)
• Explorer 17 satellite (Wikipedia)
• IMP-A satellite (Wikipedia)
• LOFTI-I satellite (Wikipedia)
• Vanguard 3 satellite (Wikipedia)
• Vanguard Lyman Alpha satellite (Wikipedia)
• Vanguard Magnetometer satellite (Wikipedia)
• • • • •
Quoting from Smithsonian National Air and Space Museum | Explorer 6 satellite
Manufacturer:
TRW Space & Technology Group
Country of Origin:
United States of America
Dimensions:
Overall: 2 ft. 5 in. tall x 2 ft. 2 in. wide, 50 lb. (73.7 x 66cm, 22.7kg)
Materials:
Aluminum alloy; plastic solar cells
This is a full-scale replica of the Explorer 6 satellite. The spacecraft was designed to study the electrical and magnetic fields about the Earth and to test devices for scanning cloud cover. It was launched on August 7, 1959. Over its 60 days of operation it provided the most comprehensive data up to then of the Van Allen radiation belts and the geomagnetic field, as well as the first televised cloud cover pictures. This replica was assembled by the program coordinator, Space Technology Laboratories Inc., from original parts that failed to meet flight specifications. The solar panels are plastic mock-ups. The artifact was displayed at the California Museum of Science and Industry until February 1964, at which time it was donated by STL to the Smithsonian Institution.
Gift of TRW Space Technology Laboratories
• • • • •
Quoting from Smithsonian National Air and Space Museum | Explorer 7 satellite
Manufacturer:
Army Ballistic Missile Agency
Country of Origin:
United States of America
Dimensions:
Approximate: 2 ft. 6 in. diameter x 2 ft. 6 in. tall, 92 lb. (76.2 x 76.2cm, 41.7kg)
Materials:
Metal shell, solar cells, electronics
Full-scale replica of the Explorer VII spacecraft. The satellite was launched on October 13, 1959 atop a Juno II vehicle and successfully went into orbit. The spacecraft carried an array of instruments designed to study a broad range of radiation from the sun including X-rays, the intensity of cosmic rays and the field of charged particles in the ionosphere as well as micrometeorite impacts. It provided data from its instruments for 13 months, during the course of which it sent back readings acquired during a major solar flare. The object was transferred to the Smithsonian Institution by NASA’s Marshall Space Flight Center in August 1972 and was restored in 2005.
Transferred from the National Aeronautics and Space Administration
• • • • •
Quoting from Smithsonian National Air and Space Museum | Explorer 8 satellite
Manufacturer:
NASA, Marshall Space Flight Center
Country of Origin:
United States of America
Dimensions:
Approximate: 2 ft. 6 in. diameter x 2 ft. 6 in. tall, 86.4 lb. (76.2 x 76.2cm, 39.2kg)
Materials:
Mixed metals, wire, paint.
This is a full-scale replica of an Explorer 8 spacecraft. The satellite was launched on November 3, 1960 atop a Juno II vehicle and successfully went into an elliptical orbit. It carried six specialized instruments designed to study the field of charged particles called the ionosphere as well as micrometeorite impacts. Explorer 8 continued to provide data until December 27, 1960. This is one of two specimens in the collection and was transferred to the Smithsonian Institution in August 1972 by NASA’s Marshall Space Flight Center.
Transferred from the National Aeronautics and Space Administration
• • • • •
Quoting from Smithsonian National Air and Space Museum | Explorer 1 satellite mock-up
Manufacturer:
Jet Propulsion Laboratory, California Institute of Technology
Country of Origin:
United States of America
Dimensions:
Overall: 6 in. wide x 5 ft. 8 1/2 in. long, 28 lb. (15.2 x 174cm)
Materials:
Metal shell
This is one of several full-scale replicas of Explorer 1 in the NASM collection. It consists of the payload section attached to an empty Sergeant fourth-stage, solid-fuel rocket motor. It was transferred to NASM by the U.S. Army Ordnance Museum in 1988. Explorer 1, also known unofficially as Satellite 1958 alpha, was the first American satellite to successfully orbit the Earth. Data from this and two subsequent Explorer satellites led to the discovery by James Van Allen of a belt of intense radiation surrounding the Earth.
Transferred from the U.S. Army Ordnance Museum
• • • • •
Quoting from Smithsonian National Air and Space Museum | IMP-A satellite
Manufacturer:
NASA – Goddard Space Flight Center
Country of Origin:
United States of America
Dimensions:
Overall: 4 ft. 5 in. tall x 2 ft. 5 in. wide x 1 ft. 1 in. diameter, 75 lb. (134.62 x 73.66 x 33.02cm, 34kg)
Materials:
Mixed metals, solar cells, electronics
This is the engineering model for the Interplanetary Monitoring Platform A (IMP-A or Explorer 18). It is the first of a series of seven satellites designed to be launched before and during Apollo flights. IMP-A carried instruments designed to measure cosmic rays, the solar wind, and interplanetary magnetic fields beyond the earth’s magnetic field. The sphere on top of the boom contained a sensitive magnetometer. Four windmill-like solar panels provided operating power. The satellite was launched on November 26, 1963 aboard a Delta vehicle resulting in a highly elliptical orbit that ranged from 110 to 122,800 miles. Data from the mission led to the discovery of a new layer of radiation beyond the Van Allen belt and confirmed the existence of a standing shock wave in the solar wind around the earth’s magnetic field. This object was transferred to NASM by NASA in May 1976.
Transferred from the National Aeronautics and Space Administration
• • • • •
Quoting from Smithsonian National Air and Space Museum | Explorer 17 satellite
Manufacturer:
NASA, Goddard Space Flight Center
Country of Origin:
United States of America
Dimensions:
Overall: 2 ft. 11 in. wide, 80 lb. (88.9cm, 36.3kg)
Materials:
Stainless steel
This is a refurbished full-scale replica of the Explorer 17 aeronomy satellite. Explorer 17 was one of the first launched by NASA to study the Earth’s upper atmosphere. The pressurized stainless steel sphere carried instruments to measure density, pressure, and temperature. It also contained a neutral mass spectrometer to study the composition of the gases in the upper atmosphere. The satellite was placed in a 158- to 570-mile orbit on April 3, 1963 by a Thor Delta launch vehicle. Data from the mass spectrometer showed the presence of molecular oxygen, atomic and molecular nitrogen and argon in the upper atmosphere; it also led to the discovery of a belt of neutral helium about the Earth. Constructed of original parts, it was refurbished by technicians at the Goddard Space Flight Center prior to its transfer to NASM from NASA in March 1975.
Transferred from the National Aeronautics and Space Administration
• • • • •
Quoting from Smithsonian National Air and Space Museum | IMP-A satellite
Manufacturer:
NASA – Goddard Space Flight Center
Country of Origin:
United States of America
Dimensions:
Overall: 4 ft. 5 in. tall x 2 ft. 5 in. wide x 1 ft. 1 in. diameter, 75 lb. (134.62 x 73.66 x 33.02cm, 34kg)
Materials:
Mixed metals, solar cells, electronics
This is the engineering model for the Interplanetary Monitoring Platform A (IMP-A or Explorer 18). It is the first of a series of seven satellites designed to be launched before and during Apollo flights. IMP-A carried instruments designed to measure cosmic rays, the solar wind, and interplanetary magnetic fields beyond the earth’s magnetic field. The sphere on top of the boom contained a sensitive magnetometer. Four windmill-like solar panels provided operating power. The satellite was launched on November 26, 1963 aboard a Delta vehicle resulting in a highly elliptical orbit that ranged from 110 to 122,800 miles. Data from the mission led to the discovery of a new layer of radiation beyond the Van Allen belt and confirmed the existence of a standing shock wave in the solar wind around the earth’s magnetic field. This object was transferred to NASM by NASA in May 1976.
Transferred from the National Aeronautics and Space Administration
• • • • •
Quoting from Smithsonian National Air and Space Museum | Explorer 10 satellite
Manufacturer:
NASA, Goddard Space Flight Center
Country of Origin:
United States of America
Dimensions:
Overall: 1 ft. 8 in. wide x 4 ft. 7 in. deep, 48 lb. (50.8 x 139.7cm, 21.8kg)
Materials:
Aluminum, magnesium, lead, fiberglass and plastic
This is a full-scale reconstructed model of the Explorer 10 satellite. Explorer 10 was designed to map the interplanetary magnetic field using three different magnetometers, as well as a plasma probe. The most sensitive of those was mounted in a very prominent sphere mounted atop a fiberglass support boom. The magnetometers were produced by Goddard Space Flight Center, and the Massachusetts Institute of Technology provided the plasma probe. It launched in March 1961 aboard a Thor-Delta with the intention of inserting it into a highly elliptical orbit to reach the region of space between the Earth and Moon. The data stream lasted only for 52 hours when the craft was estimated to be over 40 earth-radii distant, 2/3rds the distance to the lunar orbit. Explorer 10 made the first measurements of magnetic fields and solar plasmas outside the Earth’s magnetosphere. The data gathered gave support to the theory that the magnetic field surrounding the Earth is closely tied to that of the Sun.
The replica was refurbished by technicians at the Goddard Space Flight Center prior to its transfer to NASM from NASA in March 1975. All the major internal scientific instruments are represented, but many of the internal elements are dummies.
Transferred from the National Aeronautics and Space Administration
• • • • •
Quoting from Smithsonian National Air and Space Museum | LOFTI-I satellite
Manufacturer:
Naval Research Laboratory
Country of Origin:
United States of America
Dimensions:
Overall: 1 ft. 8 in. wide, 18 lb. (50.8cm, 8.2kg)
Other (antennae): 3 ft. long (91.44cm)
Materials:
Polished aluminum sphere, solar arrays
Engineering model for the first of a series of LOw Frequency Trans-Ionospheric (LOFTI) radio satellites. LOFTI satellites were one of the very early orbiting spacecraft intended to study the propagation of radio waves through and by the ionosphere. The experiment was also designed to determine whether low frequency radio signals penetrated water reliably enough to be used for communications with submerged submarines. The first in the series, LOFTI-1 was launched on a Thor-Able rocket in 1961; the scheduled separation from the Transit-3B satellite to which it was attached failed. Much valuable data on VLF and VHF transionospheric transmission was obtained in spite of the satellite’s resulting shortened time in orbit. This artifact was transferred to NASM from the U. S. Naval Research Laboratory in 1975.
Transferred from the Naval Research Laboratory
• • • • •
Quoting from Smithsonian National Air and Space Museum | Vanguard Lyman Alpha satellite
Manufacturer:
Naval Research Laboratory
Country of Origin:
United States of America
Dimensions:
Overall: 1 ft. 8 in. wide, 10 lb. (50.8cm, 4.5kg)
Other (antennae): 2 ft. 6 in. long (76.2cm)
Materials:
Aluminum
This is an instrumented full-scale replica of the Vanguard Lyman Alpha satellite, also called SLV-1. It was designed to provide data on solar radiation in the 1100-1300 Angstrom region, known as the Lyman alpha band. The satellite was launched on May 27, 1958 but failed to go into orbit due to malfunction of the launch rocket. The replica was manufactured at the Naval Research Laboratory and may have been a flight spare. It was refurbished by technicians at the Goddard Space Flight Center prior to its transfer to NASM from NASA in March 1975. It was on display at the Science Museum in London, England until 1988.
Transferred from the National Aeronautics and Space Administration
• • • • •
Quoting from Smithsonian National Air and Space Museum | Vanguard 3 satellite
Manufacturer:
Naval Research Laboratory
Country of Origin:
United States of America
Dimensions:
Overall: 2 ft. 6 in. tall x 1 ft. 1 in. wide, 25 lb. (76.2 x 33.02cm, 11.3kg)
Other (antennae): 2 ft. long (60.96cm)
Materials:
Metallic shell, phenolic mast
This is a full-scale replica of the Vanguard Magnetometer satellite, designated SLV-5 or Vanguard 3a. It was designed to study the Earth’s magnetic field. The magnetometer sensor was at the end of the cylindrical boom to avoid interference from the other instruments. The satellite was launched on April 13, 1959 but failed to go into orbit due to loss of control during first stage separation. This replica was manufactured at the Naval Research Laboratory from original components. It was refurbished at the Goddard Space Flight Center prior to its transfer to NASM from NASA in March 1975. It was displayed in the Satellites Gallery (1976-1984).
Transferred from the National Aeronautics and Space Administration
• • • • •
Quoting from Smithsonian National Air and Space Museum | Vanguard Magnetometer satellite
Manufacturer:
Naval Research Laboratory
Country of Origin:
United States of America
Dimensions:
Overall: 3 ft. 10 in. tall x 1 ft. 8 in. diameter x 6 ft. 6 in. overall, 24.2 lb. (116.84 x 50.8 x 198.12cm, 11kg)
Materials:
Metal, plastic
This is a full-scale replica of the Vanguard 3 satellite. Vanguard 3 was designed to measure solar X-rays, the Earth’s magnetic field, and micrometeoroids. It was placed in orbit in December 1959 atop a Vanguard launch vehicle. The intensity of radiation in the Van Allen belts swamped the ionization chambers, so no useful data was obtained, but the magnetic field studies with the proton-precession magnetometer were successful. Vanguard 3, also called Magne-Ray Satellite was the third and final successful satellite in Project Vanguard. The 100-pound spacecraft operated 84 days, providing excellent magnetometer data for the scientist-investigators at the newly-estabished NASA/Goddard Space Flight Center. The Vanguard Program, with its embarrassing early failures, ultimately provided a great deal of new information about the space environment. The launch failure rate was actually typical for that era in space exploration.
This replica was manufactured at the Naval Research Laboratory. It was refurbished by technicians at the Goddard Space Flight Center prior to its transfer to NASM from NASA in March 1975. It was on loan to the McKinley Museum of History in Canton, Ohio (1978-1999).
Transferred from the National Aeronautics and Space Administration
Share Your Ex-Lover’s Gifts this Valentine’s Day
“Mini Prisoner of Love” bracelet
New York, NY (PRWEB) February 08, 2012
Today, WebThriftStore.com, the first online thrift store platform for charities, launched their first Valentine’s Day sale of ex-lovers’ gifts, with all proceeds going to charity.
Famed New York jewelry designer Margo Manhattan donated one of her popular “Mini Prisoner of Love” bracelets to help raise money for the ASPCA® (The American Society for the Prevention of Cruelty to Animals®). The captivating and fun, edgy enamel red heart makes sure that you won’t be without love. The bracelet sells for $ 155, all of which goes to benefit the ASPCA. You can find it at http://bit.ly/ymAiqF. In addition to purchasing the bracelet, you can also present your best offer. All details are on the product’s page.
WebThriftStore.com features a variety of gifts for your Valentine, including clothing, jewelry, collectibles and electronics, all donated by individuals to benefit charity. Like offline thrift stores, WebThriftStore.com is a great place to find unusual items and incredible bargains. WebThriftStore.com is also the place to donate stuff you don’t need anymore, like a Valentine’s Day gift from an ex-lover. The best part is, shopping and donating can be done from the comfort of your home.
“This Valentine’s Day, let someone else try their luck with the gifts you’ve received from past lovers. We all hold onto stuff we don’t need or use. WebThriftStore is a great way to get new value from our belongings, and have it benefit charity. You also get a tax deduction for the value of what you donate.” said Douglas Krugman, Founder and CEO, WebThriftStore.
Additional items of interest for Valentine’s Day include a David Yurman Silver & Gold Bracelet, a Flip UltraHD Video Camera and La Maison du Chocolat $ 75 Gift Certificate for $ 50.
To date, charities with online stores include the ASPCA, Class Wish, Maccabi USA and the East River Development Alliance. More non-profits will be added this month.
About WebThriftStore.com
WebThriftStore.com enables any registered charity to create an online thrift store to which supporters, from the comfort of their homes, can list items for sale to benefit charity. Buyers can shop for great bargains knowing that their payment goes to charity and all items carry a 30-Day Buyer Assurance Guarantee. Donors receive a tax receipt for 100 percent of the value of their item, prepaid shipping labels, free shipping supplies and free pickup from the United States Postal Service (USPS). Any registered 501(c)(3) charity can partner with WebThriftStore to open its own dedicated online store, with no up-front fees or subscription fees. Founded in 2010 by Douglas Krugman, an experienced company builder with deep technical, financial and business skills, the business is headquartered in New York City. For more information, visit http://www.WebThriftStore.com. Follow WebThriftStore.com on Facebook at http://www.facebook.com/WebThriftStore and on Twitter @WebThriftStore.
About Margo Manhattan
Margo Manhattan is an internationally-renowned jewelry designer who began making jewelry in the byzantine technique at the tender age of 15. A graduate of FIT, Manhattan has worked at the Studio Bercot in Paris and with fashion legends such as Karl Lagerfeld, Patrick Kelly and famed Vogue photographer Arthur Elgort. In 1990, Manhattan created symbolic, ground-breaking designs: first the Earth pin for Earth Day (1990), followed by the original red ribbon lapel pin for AIDS Awareness (1991) and the pink ribbon for breast cancer for Estee Lauder’s Breast Cancer Research Foundation and other breast cancer fundraising efforts. Manhattan developed a reputation as a visionary, socially aware designer. For more information, visit http://shop.margomanhattan.com/
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