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Topic: 555

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In the News (Wed 19 Jun 19)

  555 Timer/Oscillator Tutorial   (Site not responding. Last check: 2007-09-19)
The 556 timer is a dual 555 version and comes in a 14-pin DIP package, the 558 is a quad version with four 555's also in a 14 pin DIP case.
Supply-voltage operating range for the 555 is +4.5 volts (minimum) to +16 volts (maximum), and it is specified for operation between +5 volts and + 15 volts.
The LED installed at the output of the 555 is used to monitor the output pulse.
www.uoguelph.ca /~antoon/gadgets/555/555.html   (8054 words)

 555 Gallery / Studio   (Site not responding. Last check: 2007-09-19)
The core mission of 555 Studio/Gallery is to further enrich and diversify cultural life in the greater Metro-Detroit area.
555 offers exhibition/installation space, leads and collaborates in the development of programs for the visual and performing arts, and provides workspace for practicing artists.
In this exhibition, 555 Studio/Gallery encourages the public to consider the means and motives behind profiling.
www.555arts.org   (162 words)

 555 Timer Calculator
For example, the two outputs for the two timers of the 556 are on pins 5 and 9 which correspond to the output pin 3 of the 555.
Below is a pictorial view of the 555 timer wired as a LED flasher and powered with a 9 volt battery.
The 555 circuit below is a flashing bicycle light powered with three C or D cells (4.5 volts).
ourworld.compuserve.com /homepages/Bill_Bowden/555.htm   (1137 words)

 The 555 Timer IC (and the related 556 IC)
The 555 timer integrated circuit is one of the most popular and useful integrated circuits of all time.
A lengthy tutorial here on the 555 timer and how to use it would be a duplication of effort since at  http://www.uoguelph.ca/~antoon/gadgets/555.htm  there an excellent tutorial, which you should study to learn how this IC works.
All of the timing calculations for circuits using the 555 timer are based on the response of a series R-C circuit with a step or constant voltage input, and exponential output taken across the capacitor.
www.ecs.umass.edu /ece/ece211/lab/555.htm   (948 words)

 555 and 556 Timer Circuits
The 8-pin 555 timer must be one of the most useful chips ever made and it is used in many projects.
Low power versions of the 555 are made, such as the ICM7555, but these should only be used when specified (to increase battery life) because their maximum output current of about 20mA (with a 9V supply) is too low for many standard 555 circuits.
The circuit symbol for a 555 (and 556) is a box with the pins arranged to suit the circuit diagram: for example 555 pin 8 at the top for the +Vs supply, 555 pin 3 output on the right.
www.kpsec.freeuk.com /555timer.htm   (2390 words)

 555 XXXX   (Site not responding. Last check: 2007-09-19)
A national number is a unique line number in the 555 XXXX assigned to an entity for use in all or most of the geographic NPAs in the NANP Area.
A non-national number is a line number in the 555 NXX assigned to an entity for use in a specific geographic area or areas (NPAs, states, or provinces).
The complete list of 555 NXX numbers assigned in the NANP area may be found at http://www.nanpa.com.
www.cnac.ca /numres/555/555_ln.htm   (317 words)

 Digital Cameras - Pentax Optio 555 Camera Review, Information, Specifications
Built into the Optio 555 is a 5x, 7.8-39mm SMC Pentax lens, the equivalent of a 37.5-187.5mm lens on a 35mm camera.
Still, the 555 should fit easily into larger coat pockets and purses, and comes with a handy neck strap that can be tightened down as a wrist strap.
Technically, the less-saturated color of the 555 is more accurate than the over-bright color of most consumer cameras, but I've found that consumers generally prefer their photographic color to be a bit brighter than real life.
www.imaging-resource.com /PRODS/O555/O55A.HTM   (7647 words)

 555 East American Steakhouse
For over a decade 555 East has provided superior prime beef to the choosiest beef lovers in the Long Beach area.
And as good as our prime cut is, we believe to truly enjoy your meal you need to have the perfect wine choice.
555 East - choice cuts, an award winning wine cellar, and a traditional steakhouse atmosphere combine to give you the best steakhouse experience in Southern California.
www.555east.com   (146 words)

 555 Timer
This is a basic 555 squarewave oscillator used to produce a 1 Khz tone from an 8 ohm speaker.
The series capacitor (100 uF) increases the output by supplying an AC current to the speaker and driving it in both directions rather than just a pulsating DC current which would be the case without the capacitor.
A 555 timer can be used to generate a squarewave to produce a negative voltage relative to the negative battery terminal.
ourworld.compuserve.com /homepages/Bill_Bowden/page10.htm   (1565 words)

 555 Timer Circuits
This device is similar to the 555 timer but has some significant differences such as; (1) The output of each timer is an open collector transistor having a 100 milliamp current limit.
Data sheets for the 555 Timer use the value 1.44 and 0.693 as constants in the timing calculations depending on the way in which the equation was written.
This circuit is a simple memory type circuit using a single 555 timer.
home.cogeco.ca /~rpaisley4/LM555.html   (3936 words)

 555 timer   (Site not responding. Last check: 2007-09-19)
The 555 timer is an extremely versatile integrated circuit which can be used to build lots of different circuits.
This version of the 555 astable is used in the cyclist/pedestrian safety lights project.
For a simple 555 monostable, the trigger pulse must be shorter than the output pulse.
www.doctronics.co.uk /555.htm   (1888 words)

 555 Timer
The 555 monolithic timing circuit is a highly stable device, that can act either as a time delay generator (Monostable/one-shot), a Pulse-Width-Modulator (PWM), a RC Oscillator, or a Voltage
Finally, Don't hesitate to "PLAY"--to experiment with this device; the 555 timer has many uses--some yet to be discovered; who knows you may be the one to find even more uses for it.
Triggering a 555 requires that the "Trigger" input be A.C. coupled.
courses.ncsu.edu:8020 /ece480/common/htdocs/480_555.htm   (718 words)

 555 Calculator
This calculator evaluates the performance of the generic bipolar 555 timer chip in both monostable and astable modes.
Note: It is not possible to have the low period longer than the high period with this basic circuit.
Fortunately the 555 is able to sink as well as source current, or alternatively a PNP output transistor may used to give the necessary inversion.
freespace.virgin.net /matt.waite/resource/handy/pinouts/555   (174 words)

 Steves Digicams - Pentax Optio 555 User Review
The Optio 555 is the successor to the popular Optio 550, a compact and light weight 5- megapixel camera with a powerful 5x optical zoom lens.
The Optio 555 also features PictBridge™ compatibility that eliminates the need for PC connectivity during printing by allowing the camera to be connected directly to a compatible printer.
In addition to still images the Optio 555 is also capable of recording up to 10 minutes of video with sound at 15 frames per second with 320 x 240 recorded pixels.
www.steves-digicams.com /2003_reviews/optio555.html   (1292 words)

 Sennheiser Worldwide: HD 555 - 05342
The HD 555 open, dynamic stereo headphones feature a special internal surround reflector.
This special edition of the open HD 555 has been launched to mark Sennheiser's 60th anniversary.
The stylish HD 555 Aqua Blue feature a special internal surround reflector which generates an extended, spatial sound field, making this model the ideal headphones for home cinema as well as music.
www.sennheiser.com /sennheiser/icm_eng.nsf/root/05342   (168 words)

 DCRP Review: Pentax Optio 555
The Pentax Optio 555 ($550) is an updated version of the popular Optio 550 (see our review).
While the "trim" on the cameras are different, overall the Optio 550 and 555 share the same body (the 555 being much easier to photograph).
Speaking of size, the dimensions of the Optio 555 are 100 x 59 x 39.5 mm / 3.9 x 2.3 x 1.6 inches (W x H x D, without protrusions), and it weighs 205 grams / 7.2 ounces empty.
www.dcresource.com /reviews/pentax/optio_555-review/index.shtml   (3117 words)

 Home Page
The holiday season is a very busy season for the majority of the UFCW Local 555 membership.
I’m encouraging every 555 member who can help to donate a new unwrapped toy and/or non-perishable food items and/or school supplies to help UFCW Local 555 members that could use a little assistance during the holidays.
The collected food, toys and school supplies will be distributed to Local 555 members and their families that need assistance this holiday season.
www.ufcw555.com   (261 words)

 Club-555 Online Dating, Singles, Personals Ads, Video and Voice Chatrooms, RSS, XML, Video Dating
Single people can find other single people on Club 555.
Services provided by Club 555 are for everyone.
Club 555 provides its members with a safe and anonymous venue for meeting people.
www.club-555.com   (711 words)

 Computer, Telephony and Electronics Glossary and Dictionary
We have several 555 calculators on our site but there are many GREAT 555 sites from which you can gather much knowledge.
A dual clock timer chip version of the 555, made originally by Signetics.
A quad clock timer chip version of the 555, made originally by Signetics.
www.csgnetwork.com /glossary-.html   (6358 words)

 3-digit Interstates from I-55
I have heard some amazing stories about people renting buildings for around $10 a month to people because (1) everyone knows these buildings are going to be destroyed and (2) the owners don't want insurance liability involved with an abandoned building." [6
Interstate 555 will be the official designation for 44 miles of of US 63, between I-55 at Lake David and US 49 in Jonesboro, once it has been completely upgraded to interstate standards.
Until then, "Future I-555" signs will mark the highway.
www.kurumi.com /roads/3di/ix55.html   (1184 words)

 Schematica Software 555 timer and active filter design
New - The best references available on the 555 timer and supporting circuitry.
Schematica's free 555 Timer Designer has been replaced by 555 Timer Lite.
This program is combined with a demo version of 555 Timer PRO.
www.schematica.com   (109 words)

 Pentax Optio 555 - Unbiased reviews, prices and advice from Digital Camera HQ
The 5-megapixel Pentax Optio 555 packs an impressive feature set into a remarkably small metal body.
Released in the fall of 2003, the Optio 555 is the successor to Pentax's popular Optio 550.
In response to customers' complaints about its predecessor's slow startup time, the Optio 555 is redesigned to start up almost instantly.
www.digitalcamera-hq.com /pentax-optio-555-reviews.html   (396 words)

 Schematica Software's free 555 timer design program
This freeware program replaces the popular application 555 Timer Designer.
It is now combined with a demo version of 555 Timer PRO.
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www.schematica.com /555_Timer_design/555.htm   (95 words)

 555-LIST   (Site not responding. Last check: 2007-09-19)
A compilation of 555 numbers from movies, television and radio.
The 555-LIST was last updated Sunday Apr 28, 2002 at 12:10 AM Pacific Time
This site was too useless, so they have now moved it.
home.earthlink.net /~mthyen   (61 words)

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