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  1. OLIVE2222

    12v to 5v converter board for PSU

    OK Jason, here under a suggestion for 30 Amps down converter http://www2.mouser.com/ProductDetail/Murata-Power-Solutions/LSN2-T-30-D12-C/?qs=b13bmSh8y6yQ2VTwFyspVg%3d%3d It's not fully of the shelf as you need a PCB to star connecting the disk but this is just plumbing. I don't know were you...
  2. OLIVE2222

    12v to 5v converter board for PSU

    First don't worry about your "ignorance" or being "out of your league" or any think alike! I am glad to help ! To ease the maths we go for 1 Amp on 5V and 1 Amp on 12v for each disk and one 1500watt PSU. Basically: - we keep the 5V 25amp as it - we keep 3 X 12V 30 amps as it - we...
  3. OLIVE2222

    12v to 5v converter board for PSU

    OK, it's more clear now. You don't need 60 Amp but, let say, 60 times 1 amps. This is different, and it's the reason why I have asked details. So combined with 2 or 3 1500w power supply, you can divide your problem by converting the 12Volts locally. You can go for a super easy down converter...
  4. OLIVE2222

    Design of Low noise GHz amplifier

    I am not an expert in HF stuff. I generally think in term of building blocks or single IC solution in this area. The only information I have is the following datasheet on wich you can see the way to get 50 ohms input impedance. http://www.eurotech.co.uk/data/SL560.pdf Hope that a HF...
  5. OLIVE2222

    12v to 5v converter board for PSU

    Hi, this is the more powerfull ATX power I have found (1500Watts): http://www.enermax.com/home.php?fn=eng/product_a1_1_2&lv0=1&lv1=43&no=159 this is 25Amp in the 5V branch and 30 amp in the six 12V branches. By the way which is the configuration of your server to explain such needs...
  6. OLIVE2222

    IR sensors ADC and multiplexing

    I doubt that the beam from an IR led will be narrow enought to allow correct detection. Probably many detectors will show the beam even with a finger between. Do you already try a basic single led+sensor barrier before going further?
  7. OLIVE2222

    Componant.

    Here under a query on Mouser site http://www2.mouser.com/Semiconductors/Transistors/Transistors-General-Purpose/MOSFET-Power/_/N-7h6e2?P=1z0y3zr&SAP=true Still to choice package, Ron... Olivier
  8. OLIVE2222

    Design of Low noise GHz amplifier

    You give very few information's but as first shot I will have a look on MMICs as they are easy to implement. They are many manufacturer , mini-circuits, CEL, Avago, triquint .... Olivier
  9. OLIVE2222

    help with potentiometers

    This is just a voltage divider, so keeping the same ratio should be OK. giving for a 10K Pot R1=10K and R2 = 1K The tricky part is that a Joystick will not allow you to use the whole track resistance. Only, let say +/- 20° will be available on the 270° of the inside pot. So little tweak to plane.
  10. OLIVE2222

    Noise Problem

    Hi Vinod, They are 3 thinks to learn from the schematic: -The LC filter is balanced (one inductor in each branch) same principal as described in this thread but (theoretically) more effective. - They are 3 caps in //, this increase the attenuated frequency range. - the filtered supply is...
  11. OLIVE2222

    Turn a log pot into a (kind of) linear pot

    Here under a article they can maybe help http://www.elby-designs.com/documents/tailoringpotentionometers.pdf Olivier
  12. OLIVE2222

    'Schematic Description Language'

    This is ASCII schematic. here under a program (not tried) to create them. http://www.tech-chat.de/ascii-circuits.html Olivier
  13. OLIVE2222

    Why are reesistance like 100 ohm connected between CLKp and CLKn in a processor/contr

    here under a start http://www.maxim-ic.com/app-notes/index.mvp/id/4085
  14. OLIVE2222

    12v to 5v converter board for PSU

    I agree, it will not be a simple project. One solution can be to start from a ATX supply and to: - rewind the transformer to have lower voltage - modify the feedback divider Doing someting in the 90 amp range from scratch must only be done, to my eyes, by highly skilled engineers. Olivier
  15. OLIVE2222

    Noise Problem

    Strange it's work here, anyway I attach a snapshot. It's a "symmetrical" version.
  16. OLIVE2222

    Noise Problem

    On the following link you will find another PC supply design filter (5 volts) http://books.google.be/books?id=tAK9ZjTQavkC&pg=PA41#v=onepage&q&f=false cheers, Olivier
  17. OLIVE2222

    Powerline Communications

    Dedicated integrated circuits exists for this kind of application. An obsolete one: http://www.national.com/ds/LM/LM1893.pdf and a modern one http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATA_BRIEF/CD00247163.pdf other should be available
  18. OLIVE2222

    I need reference of this voltage regulator (PIC)

    schematic for a fee http://notebookschematic.com/?tag=gateway-m-6750-schematic
  19. OLIVE2222

    I need reference of this voltage regulator (PIC)

    according to: http://www.angelfire.com/electronic2/rch/smt1.html it's look to be a "digital transistor" http://www.datasheetcatalog.org/datasheet/lrc/DTA124EKA.pdf with IN/OUT/GND labels ! odd for a transistor ! a small "reverse engineering" of concerned part of the board should help
  20. OLIVE2222

    Vacuum Tube Amp

    If you absolutely want to go for valve amplifer, maybe a OTL ( output transformer less) amplifier can be a good start.
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