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  1. S

    IC data

    Whats the poll for? //Staigen
  2. S

    Hey Ante

    Hi there Ante First of all i will say thanks for all the books! Thank you Second, is it possible to request a book or two, namely "CMOS COOKBOOK" and "TTL COOKBOOK" written by Don Lancaster? These books will getting you to know the 4000-series and TTL-series of ic:s very well! //Staigen
  3. S

    My Lab

    Hi all of you This is the topic(thread) i was talking about in an another thread! Here you can upload some pics of your lab or workingbench for us other to look at! I gonna upload some as soon i can borrow a camera from somebody! :) :D ;D And by the way, my lab is a real mess, so dont be shy...
  4. S

    I CAN'T READ THEM

    Hehe Looks like mine then ;D ;D . Of course we all want to see it, and that goes for all others too, send up a few photos of your lab! Maybee we should start a new topic first, named " My Lab" or something! //Staigen
  5. S

    I CAN'T READ THEM

    Hey Audoiguru A few photos from your electronics lab would be nice :) //Staigen
  6. S

    Transformer Power Rating

    Hi I think 0.8 mm will be just fine, its only 10 turns //Staigen
  7. S

    sensitive parabolic michrophone

    Hi Audioguru is right, the RC-snubber is for stopping oscillating, not to reduce crossover! :) //Staigen
  8. S

    Transformer Power Rating

    Hi Audioguru What do you think of making the coil airwound? //Staigen
  9. S

    Transformer Power Rating

    Hehe Audoiguru, replying at the same time //Staigen
  10. S

    Transformer Power Rating

    Hi I dont think you need the resistor, the coil can be airwound, its so small and have enough gauge to support itself! :) //Staigen
  11. S

    Transformer Power Rating

    Hi Oops, i made a mistake! Yes Audioguru, the coil is not wound around R14, but connected in parallell with it! Then your coils are just right as they are, faizanbrohi! :) I agree with you here too, but i have seen 4.7 and 6.8 ohms also, but usally it is 10 ohms. I dont disagree here either, but...
  12. S

    Transformer Power Rating

    I have seen a lot of these resistor/inductor combination, but they have all been wounded over the resistor and connected at the end of the resistor, the resistor itself usally is between 1 ohm and 10 ohm. The resistor lowers the Q of the coil! The coils you have done is just fine, maybee you...
  13. S

    Transformer Power Rating

    Hi The resistor shall also be connected to the coil and have the value of 1 ohm! Read the description, even if it is not very clear, the resistor and the coil is parallelled //Staigen
  14. S

    230V AC to 12V DC @90 AMP

    Hi One way of doing it is like this:
  15. S

    230V AC to 12V DC @90 AMP

    Hi again Madame No, increase the current drive instead, with a pair of transistors! :) //Staigen
  16. S

    230V AC to 12V DC @90 AMP

    Hi I checked on the net, the gate capacitance is 1259 pF/fet, thats a plenty of pF when multiplied with 25! The 555 cant feed that much current needed for a fast switch! //Staigen
  17. S

    230V AC to 12V DC @90 AMP

    Hi Madame A 555 can NOT feed 25 mosfets, it can not deliver that much current needed to charge/discharge the gate capacitance! They did not have enogh skills! ;D The coils should be at the same leg I dont think it will work! You must do something to the gate drive first! Then test, you will...
  18. S

    locking system

    Oops, i must be tired! ;D ??? You dont need a computer, use a microcontroller insted, complete with interface to the periferals! For the camera system, use a camera and a monitor! Also you need to program the microcontroller! //Staigen
  19. S

    DSP Book ?

    Hi there mainbrain, velcome to the forum Ok, where did you found it? Url? //Staigen
  20. S

    locking system

    Hi there mohammed Ok, i will help you a little(point you in some directions) First, i think, you need some kind of solenoid/motor or something to control the locking/unlocking/opening/closing of the door. Second, a button/keypad/cardreader or similar to check the person that will enter the...
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