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Silent Jack

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Everything posted by Silent Jack

  1. Well, the diagram you posted has two LM393's much like the one I am working from. Mine labels the pins used on each and uses differing symbols, suggesting different purpose. U1, in my diagram has pins 8 & 4 connected; these are designated as Vcc & gnd respectively. While U1.1 specifies that pins 1, 2 & 3 are connected; designated Output1, IN1(-) & IN1(+). I note, based on the diagram that pins 1, 2 & 3 seem to correspond to pins 7, 6 & 5. If these two pin sets are capable of the same things, and if as it appears there is no overlap in pin usuage, why are two used? Would it not be possible to use a single chip to perform the needed functions? Also, which portion of the IC supplants the use of the 555 you mentioned?
  2. I have an old emulator archived with around 80 games. My folks still have the original systems, but they need various repairs. The one even had an Atari expansion you could plug into the side to play Atari games.
  3. Those were great consoles. We had two growing up. Where on earth would you find one these days?
  4. Been reading through data sheets and IC layouts/circuit diagrams. Would pins 1-4 be one half and pins 5-8 be the available portion that you mentioned substituting for the 555? Went back and added the diagram I was referencing. Thought it might help.
  5. Common ground, seems a sensible solution.
  6. I noticed how incredibly dated some of the stuff I had started reading was, when I started browsing the forums. I tried to avoid threads older than a few months at the most after that point.
  7. Thank you for the additional explaination, it is helping. The part I asked about being "open" are the highlighted areas of this image. I don't recognize this notation or symbol. I've made certain to keep it in the more legible PNG format that you recommended. Overall, I am endevouring to improve my overall understanding of symbols, circuit diagrams, and the flow and function of the circuit and components. I appreciate your continued efforts in aiding my ellucidation.
  8. I just can't understand why its so hard to find a simple, round 2 prong outlet and mated plug.
  9. Perhaps you could explain a little of how this works? Also, what do all those open ends connect to in your diagram?
  10. This should give you a nice history and links to other helpful resources. http://en.wikipedia.org/wiki/Intel_8085
  11. How complicated this is depends on your requirements. How large a conveyor? What types of things do you need to sense?
  12. Are you trying to determine the power limitations of lead acid type batteries for a given application or simple looking at theoretical limits?
  13. There's numerous levels of teslas available with good detail on construction and theory on www.instructables.com . I like the pictures and step-by-step instructions they provide there. And they cover anything from small palm scale coils to large, light up your barnyard size ones. Give it a peek.
  14. There's a lot you'd need to know about your project as a whole before approaching it seriously. What power standard do they run on? Duty cycles, wattage, average use, availability of space to deploy solar panels, available space for battery storage bank, local regulations, etc, etc, etc.
  15. If we are discussing a text message on a cellphone, wouldn't it make more sense to have it forwarded to a PC and processed through software?
  16. There is a variety of information concerning inductive crucibles available on the net. A very basic cup and heating element might be constructed, but it is likely more affordable to simply purchase a refurbished one from a used tools supplier. I'm all for building it yourself, but you have to strike a balance with practicality or you end up rebuilding the wheel from scratch all too often. A hard lesson to learn, I assure you.
  17. Set a goal, then go about figuring out how to achieve it. At the very least browse the internet for topics that interest you and see if something doesn't inspire you.
  18. [i would not encourage children to develop high tech weaponry and would firmly discourage them from using them on themselves or others.] I saw a project online once that took a page from the XREF taser shotgun rounds, concept. It used pressurized air to propel a charged disposable camera capacitor, prongs first out of a simple barrel. Interesting concept, though from what I read, the 330V would be far to little to achieve the taser effect. That and I understand a specific waveform is needed to affect strictly skeletal muscle and not cardiac muscle. Seems like a safety concern to me.
  19. I've run into the same problem. Their search functions are largely useless, thumbnails are largley nonexistant and the language they use is impenetrable. I've been having trouble finding a simple pair of round 2 conductor plugs on any of the major suppliers. If you like variety and ease of use, you can try electronics goldmine. They're pretty affordable and have a often varying inventory of oddiments, as well as the common, basic components that you'd expect to find.
  20. There's a zillion different MCUs out there and they are programmed in nearly as many ways. Some require expensive hardware/software bundles, while others are free, open source and connect easily via SUB/Serial/Ethernet. Which one are you trying to work with?
  21. Scoot on over to www.instructables.com. I recall reading several different projects that dealt with this and should help.
  22. These names remind me of an old book I checked out from the library some years ago, simply because I found the title amusing. Something along the line of "Build your own laser, ray gun, phaser." I believe it was from the 70s and featured designs with similar names. I think the most interesting bit was that it gave detailed instructions about making old style lasers at home, how the glass was to be cut and prepared, it was quite detailed.
  23. Maybe if he accelerates to 85mph while doing that it will help? ;D
  24. At one time law enforcement was going to deploy these disc launchers under their cruisers. The disc was fired under a suspects vehicle and used a powerful microwave frequency burst to toast the vehicle's onboard electronics to shut it down. Or was it radio frequency? Been many years. I don't believe they were ever widely deployed. Some suggested the reason was the possibility of disabling a pursuit vehicle, though I suspect cost was more likely its down fall. Hero999 is also quite correct; EMP devices violate numerous federal laws and can get you into deep dooky. If you were trying to construct an anti-theft device, rfid type tech would be lawful, useful and not overly difficult to deploy.
  25. I know of a number of effective compass modules. As to vibrating motors, I think a simple display would be more accurate, effective and efficient. There are numerous ways this could be accomplished. I see the post is somewhat dated, so I wonder if the request is still active?
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