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Electronics Hobby
Building a new components-cabinet.
Hacker (hobbyist)
In home computing, a hacker is someone who modifies software or hardware of their own private computer system. It includes building, rebuilding, modifying, and creating software (software cracking, demoscene), electronic hardware (hardware hacking, overclocking, modding), either to make it better, faster, to give it added features or to make it do something it was not originally intended to do. Hacking in this sense originated around hobbyist circles discussing the MITS Altair at the homebrew computer club.
Hacker artists[edit]
See also: Fractal art, algorithmic art and interactive art
Hacker artists create art by hacking on technology as an artistic medium. This has extended the definition of the term and what it means to be a hacker. Such artists may work with graphics, computer hardware, sculpture, music and other audio, animation, video, software, simulations, mathematics, reactive sensory systems, text, poetry, literature, or any combination thereof.
Dartmouth College musician Larry Polansky states: "Technology and art are inextricably related. Many musicians, video artists, graphic artists, and even poets who work with technology—whether designing it or using it—consider themselves to be part of the 'hacker community.' Computer artists, like non-art hackers, often find themselves on society’s fringes, developing strange, innovative uses of existing technology. There is an empathetic relationship between those, for example, who design experimental music software and hackers who write communications freeware." [3]
Another description is offered by Jenny Marketou: "Hacker artists operate as culture hackers who manipulate existing techno-semiotic structures towards a different end, to get inside cultural systems on the net and make them do things they were never intended to do." [4]
A successful software and hardware hacker artist is Mark Lottor (mkl), who has created the 3-D light art projects entitled the Cubatron, and the Big Round Cubatron. This art is made using custom computer technology, with specially designed circuit boards and programming for microprocessor chips to manipulate the LED lights.
Don Hopkins is a software hacker artist well known for his artistic cellular automata. This art, created by a cellular automata computer program, generates objects which randomly bump into each other and in turn create more objects and designs, similar to a lava lamp, except that the parts change color and form through interaction. Says Hopkins, "Cellular automata are simple rules that are applied to a grid of cells, or the pixel values of an image. The same rule is applied to every cell, to determine its next state, based on the previous state of that cell and its neighboring cells. There are many interesting cellular automata rules, and they all look very different, with amazing animated dynamic effects. 'Life' is a widely known cellular automata rule, but many other lesser known rules are much more interesting."
Some hacker artists create art by writing computer code, and others, by developing hardware. Some create with existing software tools such as Adobe Photoshop or GIMP.
The creative process of hacker artists can be more abstract than artists using non-technological media. For example, mathematicians have produced visually stunning graphic presentations of fractals, which hackers have further enhanced, often producing detailed and intricate graphics and animations from simple mathematical formulas.
en.wikipedia.org/wiki/Hacker_(hobbyist)
Protecting Inputs in Digital Electronics
www.digikey.com/us/en/techzone/microcontroller/resources/...?
An Arduino microcontroller uses a CdS photocell and a set of LEDs to indicate the ambient light level. (Move your mouse over the picture to see explanatory notes.)
Just fooling around because I was bored. Maybe I'll think of a good use for this later.
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.
I'm very proud of the soldering I did on this. It looks so good because I made good use of my new 1lb. roll of .015 solder. It works so well!
I designed this little power supply for the tiny tube amp design I've been working on lately. And I finally got around to trying to learn how to use Eagle in the process, woo. After a bit of effort, and some cursing, I finally created the design above.
The image above, and a bunch of others, were generated by OSH Park during the order process so I could check over the Gerber layers before approving and ordering.
Here is a photo of a group of SubMix7 modules, the new Eurorack release from Low-Gain Electronics. We should have stock very soon.
Further info via this thread at Muff Wiggler: muffwiggler.com/forum/viewtopic.php?t=33840 .
We'll update our website when they are in-stock: www.analoguehaven.com/lowgainelectronics/ .
NEJE DK-5 Pro-5 is a laser engraver/cutter which can be used to engrave various materials such as hard wood, plastic, bamboo, rubber, leather, cut paper and so on.
You can buy it from Gearbest.
www.instructables.com/id/How-to-Setup-and-Use-the-NEJE-DK...
Additional documentation can be found in my website:
ediy.com.my/index.php/blog/item/134-neje-dk-5-pro-5-500mw...
Printed-circuit board work was conducted in Lawrence Livermore National Laboratory’s Photo Fabrication Shop. Each year, the Laboratory designed more than 250 printed-circuit board layouts and modified many existing ones. A new computer system introduced in 1977 automated their design.
After a RAM upgrade, my computer would run for maybe 30 seconds and then shut down. Same thing happened with various combinations of DIMMs installed ... even just the old ones by themselves.
I should mention that my computer was on the floor under my desk, and I had a snake-clamp lamp lighting it up. I smelled smoke and quickly learned the lamp's bulb needed to be vertical, otherwise the shade would rest on the bulb and it would smolder. Oops. So I brought the computer up above the desk where I could see it without the fire-hazard lamp.
At this point, I noticed something both odd and terrifying - when I powered on the machine, one of the wires from the PSU to the motherboard was glowing red. Meanwhile, the computer was happily booting up... until it shut itself off, and the wire faded to black.
Clearly the power supply was trash, but would the motherboard kill the next PSU? The fact that the computer would run for awhile before shutting down indicated the motherboard was not fried. I thought maybe a loose screw under the board was shorting something to ground, but I found nothing there. Nor were there any (visibly) burnt traces on the board itself.
So I decided to just swap out the power supply and cross my fingers -- and the machine has worked fine for several weeks since the incident.
Only yesterday did I decide to crack open the PSU and see if I could find any clues about what went wrong... (continued)
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.
“세탁조가 두 개”
■ 대용량 드럼 세탁기와 미니세탁기를 결합한 신개념 세탁 솔루션
□ 공간 활용 극대화, 두 개 세탁기 동시 사용
□ 드럼통을 비스듬히 경사지게 설계해 세탁물 투입, 회수 편리
□ ‘홈챗(HomeChat)’ 및 세탁 코스 다운로드 등 스마트 기능 지원
■ 북미 최초 고성능 히트펌프 적용, 전력 소비 53% 줄인 ‘에코하이브리드(EcoHybrid) 건조기’
■ 도어를 좌우뿐만 아니라 상하로도 열 수 있는 ‘투웨이 도어(2 Way Door) 건조기’
■ LG전자 전시문 세탁기사업부장 “다양한 사용환경을 고려한 혁신적인 세탁기와 건조기 신제품들이 라스베이거스를 찾는 고객들에게 ‘가전은 LG’ 이미지를 다시 한 번 심어줄 것”이라 강조
※ Social LG전자 (social.lge.co.kr/newsroom) 에서 관련 보도자료를 확인하실 수 있습니다.