View allAll Photos Tagged electronics
Towanda, PA. June 2015.
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So I did the common thing: bought me a Mark Hama fixed Yashica 124G to accompany the Richoh Diacord.
Daughter already called the Yashica Mat.
he Yashica has crank advance, not so much better than the dial turn of the Ricoh, but it does arm the shutter. On the Richoh, you have to remember if you've armed, and if you've taken the shot. OTH, you can take double exposures with the Richoh.
Other differences: Yashica has meter built in, and fewer blades for aperture. Richoh has a niftier way to set focus. But OTH I keep setting the timer when I mean to set the aperture on the Richoh. I'm not sure if there are any differences in the photos, will have to see once I have the same film in both.
The Leiger is a geiger counter, GPS logger, and dosimeter all wrapped up in one. It was designed and built by Rob, host of the SparkFun weekly product videos. It's always a good idea to keep an eye on radiation levels when traveling to Chernobyl.
This is what a notebook computer looks like in 2013. It's more commonly referred to as a notebook than a laptop. The first computer that I could remember was an Intel 386 back in the late 80's in Hong Kong. I've seen the explosion of the Internet along with the rise and fall of the phone line modems peaking at 56k speeds. I remember 13 years ago when AMD broke the 1GHz barrier with their Athlon. There was a time when CPU's could just be passively cooled. The emergence of wireless Ethernet was at times painful, but welcomed. This little machine with a diagonal of 11.6" no thicker than an inch is definitely more powerful than anything that I've cobbled together with parts. Quite nice to have so much computing power in a rather small package. The next technology improvement that I'm really looking forward to is for the widespread adoption of 300dpi LCD screens.
MP3/WMA players, branded for Virgin and to be coupled with Virgin Digital service but killed off in early 2005.
The Phottix Odin wireless TTL flash trigger has now been officially released.
Note that this photo shows a pre-release version of the Odin - the silk-screen labeling on the release version is slightly different.
Key features of the Odin include:
-much better range than Canon ST-E2 or Canon 580EX as master flash trigger (100m +)
-ETTL support for remote flashes
-even in manual mode, flash power output can be set from the Odin transmitter control unit
-can adjust zoom of remote flashes from Odin's TCU
-high-speed sync up to 1/8000 seconds
-second curtain flash sync
-uses commonly available AA batteries
-compatibility with Phottix Strato 4-in-1 trigger and the Strato II Multi trigger
For more info, read my review of the Odin.
strobist info: 580EX II at top right into reflective brolly, 580EX at top left into reflective brolly, both triggered by Canon ST-E2
Store closed January 2018
Austintown, OH. February 2017.
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My local Kmart will be shrinking starting in July. The store is one of supposedly 60 test stores to try a new strategy to increase sales by putting the entire store on sale.
Marshalls and other unannounced tenant(s) that will make for a 45,000 sq ft project. Interesting thing here is that the Kmart store will still be around 73,000 Sq ft rather than the 59,000 that would of been half the store. In other words, the store will still technically occupy more than half of the building.
The project is expected to be complete in Q2 next year. Hopefully this project will not turn around and cause this store to close completely as the Anderson, SC store did. Whatever happens, I'll be sure to send picture updates when I can.
Olean, NY. May 2017.
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Nikon Df, die neue Vollformat-Spiegelreflexkamera im Retro-Look mit 16 Megapixel-Sensor. Den ausführlichen Bericht gibt's hier:
www.ralfs-foto-bude.de/neuheiten/spiegelreflexkameras/nik...
Out with the old (broken SD1000), in with the new (fancy G10).
I'm really curious to see how this does shooting shows at venues that wouldn't allow my D70. The sensor's similar to the rest of the current Canon point and shoot lineup (icky 1/1.7" CCD sensor) but the lens is nice (28-140mm f/2.8-f/4.5), it's got a viewfinder and dedicated knobs for ISO and exposure compensation and a lots of tweakable features to get just the picture I want.
Electronics Hobby
From Wikipedia, the free encyclopedia
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"Power amplifier" redirects here. It is not to be confused with RF power amplifier.
Mission Cyrus 1 Hi Fi integrated audio amplifier (1984) [1]
An audio power amplifier is an electronic amplifier that amplifies low-power audio signals (signals composed primarily of frequencies between 20 - 20 000 Hz, the human range of hearing) to a level suitable for driving loudspeakers and is the final stage in a typical audio playback chain.
The preceding stages in such a chain are low power audio amplifiers which perform tasks like pre-amplification, equalization, tone control, mixing/effects, or audio sources like record players, CD players, and cassette players. Most audio power amplifiers require these low-level inputs to adhere to line levels.
While the input signal to an audio power amplifier may measure only a few hundred microwatts, its output may be tens, hundreds, or thousands of watts
en.wikipedia.org/wiki/Audio_power_amplifier
History[edit]
Three audio power amplifiers
The audio amplifier was invented in 1909 by Lee De Forest when he invented the triode vacuum tube. The triode was a three terminal device with a control grid that can modulate the flow of electrons from the filament to the plate. The triode vacuum amplifier was used to make the first AM radio.[2]
Early audio power amplifiers were based on vacuum tubes (also known as valves), and some of these achieved notably high quality (e.g., the Williamson amplifier of 1947-9). Most modern audio amplifiers are based on solid state devices (transistors such as BJTs, FETs and MOSFETs), but there are still some who prefer tube-based amplifiers, and the valve sound. Audio power amplifiers based on transistors became practical with the wide availability of inexpensive transistors in the late 1960s.
Design parameters[edit]
Key design parameters for audio power amplifiers are frequency response, gain, noise, and distortion. These are interdependent; increasing gain often leads to undesirable increases in noise and distortion. While negative feedback actually reduces the gain, it also reduces distortion. Most audio amplifiers are linear amplifiers operating in class AB.
Further developments in amplifier design[edit]
For some years following the introduction of solid state amplifiers, their perceived sound did not have the excellent audio quality of the best valve amplifiers (see valve audio amplifier). This led audiophiles to believe that valve sound had an intrinsic quality due to the vacuum tube technology itself. In 1972, Matti Otala demonstrated the origin of a previously unobserved form of distortion: transient intermodulation distortion (TIM), also called slew rate distortion. TIM distortion was found to occur during very rapid increases in amplifier output voltage.[3] TIM did not appear at steady state sine tone measurements, helping to hide it from design engineers prior to 1972. Problems with TIM distortion stem from reduced open loop frequency response of solid state amplifiers. Further works of Otala and other authors found the solution for TIM distortion, including increasing slew rate, decreasing preamp frequency bandwidth, and the insertion of a lag compensation circuit in the input stage of the amplifier.[4][5][6] In high quality modern amplifiers the open loop response is at least 20 kHz, canceling TIM distortion. However, TIM distortion is still present in most low price home quality power amplifiers.[citation needed]
The next step in advanced design was the Baxandall Theorem, created by Peter Baxandall in England.[7] This theorem introduced the concept of comparing the ratio between the input distortion and the output distortion of an amplifier. This new idea helped audio design engineers to better evaluate the distortion processes within an amplifier.
- my first ever SLR cameras, used from the mid 1970's to the late 1980's. After that I started to buy into the Olympus OM system.
The 3003 has the Tomioka 55mm f 1.4 lens, which was an excellent lens.
I always kept a skylight filter on the lens and it is still in excellent condition today.
The 3003 was also the first (SLR) I bought with my own money. Before that my other cameras ( Agfa box, Agfa Record II and the Revueflex E) had always been handed down to me. I think I bought the 3003 in 1975 or 76, later I also bought a 28mm and a 200mm lens for it. I also had the auto bellows, extension tubes and other attachements.
The main feature why I wanted this camera was the ability to take multiple exposures easily, just by moving a small slide on the top plate of the camera.
The top of the camera is now somewhat dented and shows the impression of a zipper. I had wrapped the camera in a pair of blue jeans before putting it into my suitcase - for protection during travel. The suitcase must have gotten dropped or squeezed leaving that souvenir - everything still works, though!
Store will be closing early April 2018
Rutland, VT. October 2016.
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Once upon a time we had electronic boxes that did only one thing at a time, in fact couldn't do anything else, but that one thing. (Well, okay this one can record as well as play.) It gave me a curious sense of peace to plug my headset into it and play a music tape Dave put together (must have been in the 90s) called Worldviews End, which still seems appropriate. It has Tubular Bells on it, by golly. The futuristic sound of the past.
There is something to be said for an entertainment device that is isolated by itself with no possibility of checking for Facebook updates or latest news of Bangkok under seige. Spent a restless night looking at all that last night. Such is our connectedness that we can be in more than one place at once experiencing more than one apocalypse at once. Our apocalyptic oil spill here makes me want to shoot someone.
The sound is a lot better on this box than what I get listening to music videos on youtube on my laptop and it's strangely restful not to be looking at something visual at the same time. I was so pleased with myself that I was able to find, in my toolbox of old things, an adapter so I could plug my current headset into the 1/4" receptacle. The kerchunk of the buttons feels archaic and clumsy and even I can hear the whir of the tape going round, reminding me that there have been improvements I've grown to take for granted.
The deck belongs to my mother. We were doing a clean-out of her garage and she said I could get rid of it. Guess it will hang around here for awhile. It draws so little power (2 watts) I could play it in my car with an inverter. (The car has a tape player, but it's broken and who fixes those these days?) I do have a portable cassette player for listening to books on tape that are still being loaned out at the library, but the sound is a bit louder on this deck, plus it's less likely to go flying and fall under the seat.
The last photo I posted of the Kaypro 1, I expressed that I found it puzzling Kaypro ditched the "universal" motherboard that most of their computers used, in favor of adapting a new board from the Kaypro 10 model.
Well after some research it seems that as the CP/M market died, Kaypro wanted to reduce the number of cp/m machines they produced, which in 1985 consisted of the Kaypro 4, New 2, 2x, and Kaypro 10.
The 4/new2/2x all shared the same internals, minus some very minor differences in hardware (such as having or not having a real time clock, or internal modem). The Kaypro 10 used a different board than the other computers.
I guess the thinking for ditching the "universal" board for 10 style board with the Kaypro 1 was that the ten had sold well for Kaypro, and continued to sell well. While the sales of the floppy disk based systems (the 4 et al.) had fallen off considerably.
So in order to save costs, Kaypro ditched the universal board in favor of the 10 board, and created the 1.
This actually almost makes the "1" model name make sense because it's more in line with "10" and the "1" replaced several models, with just 1 model.
Some contemporary literature mentions Kaypro working on or released a Kaypro with one disk drive, that would list for $995. I think that these statements are probably all incorrect, and the people writing them probably were refering to the Kaypro 1. The Kaypro II was called the II because it had two drives- so industry writers may have mistakenly thought the Kaypro 1 would be released with only one disk drive, going by the name. Or other simple miscommunication between Kaypro and the press about the 1 could have lead to the exact same mistake.
Although the 1 had just been introduced for 1986 and took advantage of Kaypro 10 parts... Kaypro also announced in 1986 that production would be ceasing on the 10! They also stated the 1 would be dropped and the 2x would be brought back... despite the announcement apparently Kaypro realized how silly this would be, and the 2x was never brought back. The 1 became the sole cp/m offering from Kaypro in 1987, and production of all kaypro portables (including the MS-DOS 16 and 16/2) ceased later that year.
Another people-free shot, virtually impossible to accomplish at the perennially busy Olive Branch Target! Mind-boggling to think of how many people walk through this store a given weekend, and how few walk through the Horn Lake store. I say few; obviously it's enough to be profitable, and it makes for a great experience (who wants to go to a crowded store?!), but it admittedly does feel light.
Anyway: this is of the snazzy Target Electronics desk. I thought this was a standard part of all stores with this style; that is to say, I thought all stores remodeled with this look got this electronics desk. But as you'll see later this summer, at least one freshly remodeled store still has its same old “boat,” just like Horn Lake. Maybe they only put these in new builds...?
I also have to say, I'm really going to miss the layout once Horn Lake inevitably remodels. Having the music and movies still in the front of the store has been awesome, and something I've grown used to. It's so weird having to go all the way to the back in this store! I know they have their reasons for putting the section there, though...
(c) 2015 Retail Retell
These places are public so these photos are too, but just as I tell where they came from, I'd appreciate if you'd say who :)
Too many exams, too many assignments. No time at all for creative photo-taking.
That all changes tomorrow after writing the final exam for the semester. Yay! Time to dust off the X100, format an SD card, and charge some batteries :)
My Minolta Maxxum 7000, with the 50mm f/1.7 Maxxum AF lens.
Unfortunately, this camera has electronic gremlins.
Well I know, my soldering is awful. It took a while to get this microcontroller to work, 4 days to be exact. Now it works as designed.
SDIM2222
La Makina Optical Co., Ltd fu una casa giapponese attiva tra il 1967 e la metá degli anni ottanta. In Giappone era conosciuta anche come Makina Kogaku Kambushiki Kaisha. La Makina Optical fu fondata nel1967 in Gotanda, Shinagawa, Tokyo e pare che all'inizio la costruzione fosse del tutto artigianale, in un garage sul retro, e che si avvalesse dell'aiuto di numerose casalinghe pagate a cottimo che assemblavano i pezzi a casa. La Makina produsse anche obiettivi per conto terzi, come Vivitar e Hanimex. Nel 1974 iniziarono peró a commercializzare obiettivi sotto il proprio nome, Makinon, ma anche Makinar. I nomi Makina, Makinon e Makinar erano anche marchi registrati da case tedesche prima degli anni settanta. La Makina Optical non sopravvisse alla rivoluzione dell'autofocus negli anni 80 poiché alti costi di produzioni e progettazione di tali obiettivi erano insostenibili per le piccole compagnie. Tra gli ultimi tentativi fatti dalla casa per rimanere presente sul mercato ci fu questa MK-V, di cui non si sa praticamente nulla. Essa é peró molto simile alla onnipresente Cosina CT, nel caso specifico la CT-10 che era una versione molto alleggerita e completamente automatica della CT-1.
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