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  1. EdwardM

    What do the Address and Data Pins do on an EPROM?

    Hi V8meathead sounds like you've worked it out already Take a look here: http://xtronics.com/memory/how_EPROM-works.htm Ed
  2. EdwardM

    89c238 datasheet or pin config

    Hi Muhammad Abu Bakar try this http://www.semiconductors.philips.com/acrobat_download/literature/9397/75014374_micro.pdf Best of Luck Ed
  3. EdwardM

    Battery Substitute

    Hi magatru The first question I have to ask is: are you sure that the replacement L- Ion battery is fully charged? as within reason 950mAH is the same no matter which battery technology you use.  I've done a net search of PDA's and some specify that either L-Ion or L-Polymer can be used. If...
  4. EdwardM

    Magnet Wire or Enameled Wire?

    Hi Xenobius I'm half-awake now - my usual state - but was thinking if you need to do more than a few coils, one way is to take a round plastic rod, taper the end of it and machine a spiral groove into the taper of the correct number of turns - its then easy? to produces lots of copies Best of...
  5. EdwardM

    Optical guitar pickup

    Hi MP I'm aware of the differences between and advantages of mag pickup, if you check back the posts, what I've done is provide one possible solution to moeburns' original question and hopefully given food for thought. ? my problem? On your point about diffraction and vertical movement, it's...
  6. EdwardM

    Magnet Wire or Enameled Wire?

    Hi Xenobius ??? Doh, it's late the illustration reminds me of those anti-theft devices fitted to high value goods in shops which gives me the idea of using a largish lump of sellotape or similar, sticky side up and carefully wind around that. As I said it's late, hope this helps Ed
  7. EdwardM

    Magnet Wire or Enameled Wire?

    Hi Xenobius sorry if this sounds dumb, but wind it on a rod first, remove rod and spray with lacquer or similar, ends of wire can be glued to plastic strip or am I missing something?  ;D Best of Luck Ed
  8. EdwardM

    Magnet Wire or Enameled Wire?

    Hi Xenobius no worries, glad we could help Ed
  9. EdwardM

    PT100

    Hi John hopefully he's got the point by now... Cheers Ed
  10. EdwardM

    light sensor help please

    Hi mphotis you could try experimenting with something like this... Best of Luck Ed
  11. EdwardM

    Magnet Wire or Enameled Wire?

    Hi All, thanks to tnk2k, I can can see that my post was not as unambiguous as it might have been... By this I mean enamelled copper wire. As I said, I've heard the term 'Magnet Wire' but never in the UK, I suspect it's something originally from across the pond, perhaps someone from there...
  12. EdwardM

    PT100

    Hi Junaid would you please stop SHOUTING, hotwaterwizard has provided links to get you started. Perhaps it would help if you could tell us the range of temperatures that you wish to measure, is it 0-100C for example or the full range of the sensor? Best of Luck Ed
  13. EdwardM

    Magnet Wire or Enameled Wire?

    Hi Xenobius over the past few years I've designed a number of transformers and coils and whilst I keep hearing the term 'magnet wire' I've never used anything but single strand insulated copper wire.  My guess is that the wires insulation properties are geared toward the production of coils...
  14. EdwardM

    Optical guitar pickup

    Hi Alun basically, none at all and the magnetic pickup is well proven and cheap. Using the type of thing I suggested would probably get people involved in DSP and the higher realms of mathematics. But the original question was about designing an optical means of achieving the same thing -...
  15. EdwardM

    Optical guitar pickup

    Hi this is the sort of thing I was thinking of, a Fairchild 2048x1 pixel sensor.  Whilst many are designed for use with scientific instruments, I'm sure that you'll find others which are much cheaper and which could be used either staggered or in line to cover the full distance beneath the...
  16. EdwardM

    Optical guitar pickup

    Hi moeburn I recently did some design work on an absolute angle encoder, arising out of that I looked at 'other' ways of achieving a solution.  One of these ways was to use a cmos strip or CCD sensor, there are a few companies, mainly in California which supply them and which may be a solution...
  17. EdwardM

    Looking for a software Breadboard

    Hi I bought Lochmaster some time ago and it's an excellent program for stripboard layout and produces brilliant images of the design, but very high on my 'wish' list would be for it to do schematic capture and manual or automatic routing! Best of Luck Ed
  18. EdwardM

    electronic valve shower, do you have an idea???

    Hi better yet, join lots together to make a condo, rent it out (internet now possible) Hey it's saturday, wind-down time  ;D Ed
  19. EdwardM

    Electric Lock

    Hi likewise, I recently freelanced for a company which used a swipe card entry system, every time the system failed, NO ENTRY, you had to hope you could attract someones attention inside who could open the door in the old fashioned way! Ed
  20. EdwardM

    Construction design!

    Hi All If slightly off topic, sorry  :-[ Because air-wire construction is fast and fun, perhaps we might like a photo competition, not forgetting upload limts, of working circuits built this way? What do you think? Ed
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