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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.
A kit system labeled Stark on the outside but has Hickok marked on the individual plastic part holders. This kit is full of resistors, capacitors, transistors, tubes, chokes, transformers, potentiometers, diodes, sockets, etc. The plastic boards were snapped together giving the student a base to build hundreds of different projects. I'd love to find an original experiments manual for this unit. I currently have 7 of these and have been attempting to put together complete units. I may end up with 4 total when all is said and done. A couple of these kits are available if anyone is interested.
Notice the empty glass counter.
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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.
Here's my workbench (and the tiny room it's in) for the BricoGeek contest.
This is in the vanity attached to the master bedroom. The workbench surface is 3/4" ply with a cheap pine dropedge, and sits on spacers above the sink. Standard bathroom-style cabinet below stores the larger parts and tools.
The medicine cabinet holds a few finished BEAM bots, power supplies, and chip programmers.
Opposite the bench is a floor-to-ceiling linen closet, which is full of more tools, parts, toys, books, notebooks, etc...
On floor, bottom-right, is a large three drawer tupperware thing with even more parts, tools, and waiting-to-be-scavenged tidbits.
Thanks for looking,
Rudolph - letsmakerobots.com
We buy used electronic gadgets like laptop, desktop and servers at lapitop.in you may reach us to sell your gadgets.
📱 +919980196197 📧 info@lapitop.in
THANKS and our COMPLIMENTS to its developer Mr. Wassner from Graz, Austria, who was so kind to visit us in Munich! :)
The electronics bay with 14.6A 24VDC Meanwell PSU available from WanHao USA, Mouser, and other suppliers.
FlashForge Mightyboard rev E clone board with C20 and Extra FET added. FlashForge peripheral terminals replaced with Phoenix screw down terminals. The stepper driver cards are modified Pololu A4988 Black boards. Modified to work with the Mightyboard replacing the standard Botstep cards. Also, the Pololu boards have been adjusted to support the higher current needs of the X, Y and Z stepper motors.
The wiring for the stepper motors is not yet connected.
Almost there! I just need my UART, SRAM, and trickle charge time keeping chip to come in, and I can do my first full test.
4 NAND (2И-НЕ) элемента. Глядя на гигантский размер кристалла (944x854 µm) — становится очевидно что и «старые» микронные технологии до сих пор используются. Интересно обилие «резервных» via для увеличения выхода годных.
This is where the taking apart and putting together happens. It's a tile tabletop sitting on top of some plastic shelving units which it turns out are quite strong. Hey, whatever works, right?
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)