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Everything posted by mixos

  1. After exposure you should develop the board in NaOH solution. The solution must have aroung 5,8g per litre of water. After 1-2 minutes you will se the pcb artwork to appear on the board. Wait until it seems clearly. After this step you move to etching step as normally on no photo fabrication method.
  2. [iurl]http://www.electronics-lab.com/forum/index.php?board=29;action=display;threadid=2494[/iurl]
  3. [iurl]http://www.electronics-lab.com/forum/index.php?board=12;action=display;threadid=2496[/iurl]
  4. Check out those plans i found Plans_for_Micro_Lathe.pdf
  5. Ever wonder what's lurking within the dark corners, nooks and crannies of your computer? Is some gremlin responsible for all those crashes---you know, the ones that happen when you are trying to save that critical document you've been working on so diligently for the past three hours? We wondered too, so we took a look to see what we could find. And guess what? When we put the computer chips under the microscope we found some very interesting creatures hiding there. Hewlett-Packard superscalar PA-RISC 7100LC Hummingbird microprocessor chip Their search has led to a new collection of photomicrographs (photographs taken through a microscope) featuring many of the interesting silicon creatures and other doodling scribbled onto integrated circuits by engineers when they were designing computer chip masks. The tiny creatures are far too small to be seen with the naked eye, so we have provided high-magnification photomicrographs to share these mysterious wonders with our visitors. Engineers designing modern computer chips have a very rich sense of humor as you will discover when you visit our Silicon Creatures Gallery that we keep corralled in the Silicon Zoo. We hope you enjoy your adventure! Source: http://www.microscope.fsu.edu/creatures/index.html Also downlod this great screensaver: http://www.microscope.fsu.edu/software/screensavers/zoosaver.html More interesting microscope images here: http://www.microscope.fsu.edu/micro/gallery.html
  6. You must start by identifing the magnetic compass sensor you will use. Some common sensors are: KMZ52 from Philips HM55B from Hitachi 1490 Compass Sensor Then you can take a look to some schematics/application notes to see how this can be intergrated to your system: 1490 Digital Compass http://www.imagesco.com/articles/1490/01.html Electronic Compass Design using KMZ51 and KMZ52 http://www.web-ee.com/primers/files/AN00022_COMPASS.pdf
  7. A virtual scanning electron microscope (SEM) on your PC! Check out this great software and watch as close as you couldn't imagine into chips, flyes, rocks, ect. Hope developers release more data in future. Texas Instrument DLP (Digital Light Processing) chip Virtual Lab completely emulates a scanning electron microscope and allows any user to zoom and focus into a variety of built-in microscopic samples. It also comes with a set of educational materials such as a demo on how a SEM works and movies of the real thing in action. An integrated circuit (TI jm38510 series NAND gate) Virtual lab allows users to pan around a sample and zoom up to 3,600 x magnification. There are also controls to control focus, brightness, and contrast. It effectively simulates a real SEM's set of controls. It serves as a very accessable alternative compared to the costs of purchasing and setting up a real Electron Microscope. Download it : http://learn.arc.nasa.gov/vlab/install/VirtualLab-pc.zip more info: http://learn.arc.nasa.gov/vlab
  8. Hello Bakr Usually a 5V 100-150mA power supply is sufficient. Check here a datasheet of a common LCD module with LED backlight. I also suggest you to check this article: http://www.electronics-lab.com/projects/pc/020/index.html You may interest on this ;)
  9. [iurl]http://www.electronics-lab.com/forum/index.php?board=29;action=display;threadid=2085[/iurl]
  10. This component is noted as (+theta) and connected to DEMAG. at the schematic. Do you know what exactly it is? The only info available is that it is used to demagnetise -degauss (what exacty to demagnetise?) and it is used in TV's power supply.
  11. Hello :D You can find some Soundcard oscilloscopes software that require no hardware to be attached to the pc. You need only one sound card and some connectors to drive the signal at the input of the sound card of your pc. Check here: http://www.electronics-lab.com/downloads/pc/index.html Additional pc oscilloscopes: Non Commercial http://www.ee.washington.edu/conselec/CE/sp95reports/guterman/final/scope1.htm http://www.geocities.com/huz_52/ http://home.planet.nl/~m.f.hajer/ http://www.discovercircuits.com/O/oscilloscopes.htm http://www.geocities.com/tangmonster911/oscilloscope.htm (ISA bus) http://www.dansworkshop.com/Homebuilt%20oscilloscope.shtml (TV based) http://www.geocities.com/SiliconValley/Lakes/7156/articl3.htm (with LEDs) http://www.electronic-projects.net/Electronic-Projects/projects/telescope/index.shtml (TV based) http://www.intio.or.jp/jf10zl/tvosc.htm (TV based) Commercial: http://www.qkits.com/serv/qkits/velleman/pages/pcs500.asp http://www.scope4pc.com/ http://www.acqiris.com/Products/Cougar_main.html http://www.picotech.com/oscilloscope.html http://www.designnotes.com/Specials0702.htm http://www.usb-instruments.com/ (USB) http://www.arborsci.com/Products_Pages/Software/PCOscilloscope.asp http://www.linkinstruments.com/oscilloscope21.htm http://www.bitscope.com/
  12. I am aware of those access problems, I will do my best. For the time the reason isn't located. Please report here your experiences, they are helpfull. Thanks for your patient.
  13. The issue of evenly PCB etching can be solved by adding a traveling mechanism that will be parallel to the board. That's a challenge also. That's for sure a great idea that will help a lot, we will try to use common and easy to find materials. Azax bottle sprayer is a good idea. Maybee some first tests can be done with it.
  14. A windscreen's nozzle doesn't seems to work because it doesn't actually "spray" the water but shoot it in an almost straight line. I think the best nozzle could be one like garden's watering nozzle (maybe turning also) or a glass detergent bottle nozzle. Also, a mechanism from dish washing machine could do the job. The fuel injection system seems to be not the easiest way and maybe it isn't etch resistant. After a succesfull nozzle selection there is need for a powerfull pump that will recycle the fluid. Maybe one for windscreen clearing system could be nice. That's good news Dazaa! The traveling mechanism is a nice idea! and for sure it is the most difficult to build! It must also be from etch resistant material! That construction is a challenge!
  15. Do you have any ideas on how to make a nozzle or a complete system that will spray water (or etchant?) continiously? If the system could be etch-resistance (plastic parts in touch with fluid) then it can be perfectly be used as a nice spraying PCB etching machine.
  16. [iurl]http://www.electronics-lab.com/forum/index.php?board=25;action=display;threadid=2136[/iurl]
  17. [iurl]http://www.electronics-lab.com/forum/index.php?board=28;action=display;threadid=1440[/iurl]
  18. That's nice! From now you are moderator along with MP and me to the Electronic Projects Design/Ideas section. Check your private messages form more details. Thanks you for helping to make this community even better.
  19. Yevgeni P. From now Yevgeni P. is moderator in Theory articles section! Thanks for your attitude to be a moderator. I saw your messages and i think you will be the perfect man for this position. I am e-mailling you some details, check them and you are ready. I am sure you will do your best ;) Dazza What's your favorite board in the Community? Would you like to moderate it along with others and me?
  20. Hello Yevgeni :) To become a moderator the only thing needed is LOVE about electronics and have the appetency to frequently watch the board/s you moderate and if you see something not right or moral to act accordingly. Have in mind that you won't be alone, also other moderators and admin watch the boards to keep the forum clear. If you want to be a moderator tell me the board/s you like to moderate. Thanks for your consciousness to make this community a nice place.
  21. Yes, this datasheet was removed as requested from the manufacture.
  22. Finally found this one: http://www.fischerelektronik.de/fischer/upload/Fischer/E010.pdf from local distributor of Fischer Electronics.
  23. Something like COH-1002 will be nice. It may be even more simple than this without any "extra" characteristics.
  24. What do you propose to use as a "Heat transfer sheet" ? I am searching something like this one: http://www.geltec.co.jp/english/product/pro_09.htm Thanks
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