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Protecting Inputs in Digital Electronics
www.digikey.com/us/en/techzone/microcontroller/resources/...?
Annotated photo of the WF121 Development Board for a support forum post: bluegiga.zendesk.com/entries/55734217-Connecting-wifigui-...
Electronics hobby
Designing and building a high power amplifier capable of driving low impedance (as low as 2 Ohm’s @ 50 Vpp) loads.
www.diyaudio.com/ see alias FdW
History of DIY audio
Audio DIY came to prominence in the 50s to 60s, as audio reproduction was relatively new and the technology "complex," audio reproduction equipment, and in particular high performance equipment, was not offered at the retail level. Kits and designs were available for consumers to build their own equipment. Famous vacuum tube kits from Dynaco, Heathkit, and McIntosh, as well as solid state (transistor) kits from Hafler allowed for consumers to build their own hi fidelity systems. Books and magazines were published which explained new concepts regarding the design and operation of vacuum tube and (later) transistor circuits.
While audio equipment has become easily accessible in the current day and age, there still exists an interest in building one's own equipment, including amplifiers, speakers, preamplifiers, and even CD players and turntables. Today, a network of companies, parts vendors, and on-line communities exist to foster this interest. DIY is especially active in loudspeaker and in tube amplification. Both are relatively simple to design and fabricate without access to sophisticated industrial equipment. Both enable the builder to pick and choose between various available parts, on matters of price as well as quality, allow for extensive experimentation, and offer the chance to use exotic or highly labor-intensive solutions, which would be expensive for a manufacturer to implement, but only require personal labor by the DIYer, which is a source of satisfaction to them.
Celestron CG5 mount with SkyWatcher SynScan Upgrade kit,
SW Newton 130PDS (650mm, f/5),
Cooled Canon 350Da,
Baader MPCC Mk3 Coma Corrector,
SW Finder 9x50 with QHY5 guide camera,
Self-made Auto-Focuser, Finder's and Secondary Mirror's Heaters with controller, thermal insulation of the scope, 36 Ah battery pack, box with controll electronics.
For Sale - TOSHIBA true Flat screen 32" TV (CRT - not LCD or Plasma). Remote control included. Antenna/Cable/Sat, S-Video and Composite Video inputs in the back. Additional S-Video and Composite Video inputs in the front as well. Speakers built-in. Silver finish. Screen is truly flat and measures 32" diagonally.
In Excellent Condition. Bought 4 years ago. Excellent for TV viewing or gaming. Asking $165 or best offer. Pickup only. Pl call 734.674.6868.
Store closed September 2017
Malone, NY. October 2016.
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Store closed October 2017.
Pictures of its final days can be found from Retail Regents here:
www.flickr.com/photos/kmart9542/sets/72157688184498486
Herkimer, NY. January 2017.
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Folder versatility - a 'parts' Bessa Rangefinder with no Compur shutter, no Voigtlander lens, and a broken front door catch, as a 'test-bed' for Kodak Anastar and Ross Xpres lenses.
WEEK 28 – Raleigh-LaGrange “Secret” Walmart
Now for a shot of the entertainment section, focused on the electronics desk here. I was in the Southaven Walmart recently (would you believe I'm currently sitting on photos from two update: three Walmarts and six Krogers, not including either chain's Hernando store?!) and noticed they had gotten what I believe to be this exact gray counter, minus the logo and tagline on the front. If only they could have gotten the rest of this décor during the recent remodel instead of more Cheap Impact...
(c) 2016 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 :)
Not as elaborate as the Erectronics units but still pretty darn cool. Check all 4 photos I have for a complete picture.
A 120-film camera with a rudimentary auto-exposure system, dating from c.1961. This is (a later version of) the second version of the Fujipet [Camera-wiki], the first version having a round, conical viewfinder perched on the top, and exposure setting by a lever with weather symbols setting the aperture. The first auto-exposure version had a red with white letters EE badge and no sensitivity knob beside the lens. This newer version has a selenium-cell controlled trap-needle ("EE") exposure system setting the aperture, and a self-cocking shutter.
This one still seems to work; covering the meter cell prevents it firing. There's a two-position knob beside the lens which looks like it sets colour or black-and-white, presumably changing the aperture range, as the shutter is marked as 1/60s below the lens.
Towanda, PA. June 2015.
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via Instagram ift.tt/1XnL1hN Of all the film cameras I've owned, the Rolleiflex 4.0FW is one that I very much miss. #rolleiflex #ilfordhp5 #shootonfilm #blackandwhiteisworththefight
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.
Olympus E-p1 body
14mm f/2.5 Panasonic lens
20mm f/1.7 Panasonic lens
14-42mm f/3.5 to f/5.6 Olympus lens
Olympus VF-1 optical viewfinder
[Note: The VF-1 accessory viewfinder was originally designed for the 17mm f/2.8 Olympus lens. I have the 17mm but rarely use it because I have never been satisfied with its image quality. I find the VF-1 easy to use with my 14 and 20 primes. With the 14-42mm zoom, I find it easy to use with any focal length set between 14 and 25mm.]
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.
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.
Das ist das neue Flagschiff von Olympus: Die OM-D E-M1. Sie ist die offizielle Nachfolgerin der E-5. Einen ausführlichen Bericht zur E-M1 gibt es hier:
www.ralfs-foto-bude.de/neuheiten/systemkameras/olympus-om...
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 :)
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