Recent content by allvol

  1. allvol

    muzzle flash

    Oops!  I did err by flipping the two.  My bad!  That's why the board needs experts to keep us straight.  Thanks.
  2. allvol

    Re: Wave Bubble?

    Aluminum foil, wadded tightly and crammed into your car's exhaust tailpipe, will eliminate their being able to follow your automobile's movements.
  3. allvol

    muzzle flash

    200n is 200 nanofarad.  Caps are general valued in microfarad (uF) for the largest through picofarad (pF) to nanofarad (nF) The voltage of a cap is the largest voltage the cap is capable of carrying. Think of caps in circuit as small batteries that charge up to the voltage in the circuit, ...
  4. allvol

    Numeric counter displayed in 7-segment LED

    What are you using to pulse the 7490?  You can manually count with a push-button wired bounceless, or you can use a 555 timer for continuous counting.
  5. allvol

    Capacitor

    Then check this out: http://justhandhelds.com/Merchant2/merchant.mv?Screen=PROD&Store_Code=001&Product_Code=10001&Category_Code=99-010
  6. allvol

    Help with Timer IC

    Generally, the 555 timer IC is not used for long-duration time events, but is, as you say, useful for turning things off and on, and is also used to provide a fairly reliable clock pulse. Go to " 555 timer " on any search engine and you'll find all the information you need to use this little...
  7. allvol

    How many people here scrap old electronics?

    I had some good luck with recycled parts today. At what we call in the US a garage sale, I bought an old cassette tape Panasonic answering machine.
  8. allvol

    Free Avrs from atmel, how?

    Apparently, they aren't giving away samples now.  I couldn't find anything, either.
  9. allvol

    What should I do with these 555 and 556 timers?

    Really, all this is covered in depth in the 11 pages of Free sample chips! found at the top of this page.
  10. allvol

    What should I do with these 555 and 556 timers?

    Be aware that many samples you receive these days will be in the SMD package... hard to work with unless you have magnified eyes and a steady hand - plus the special pads. AllVol
  11. allvol

    Shrinking heat-shrink sleeves

    I would suggest you not actually touch the sleeve with your soldering iron - merely get close enough for the radiated heat to reach the material. AllVol
  12. allvol

    A novel circuit uses the adjustment pin of a regulator IC to provide audio ampli

    I wonder how faithfully this circuit could reproduce the microphone input.
  13. allvol

    excess-3

  14. allvol

    excess-3

    Excess-3 is a non weighted code used to express decimal numbers. The code derives its name from the fact that each binary code is the corresponding 8421 code plus 0011(3).
  15. allvol

    excess-3

    Excess-3 is a non weighted code used to express decimal numbers. The code derives its name from the fact that each binary code is the corresponding 8421 code plus 0011(3).
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