Recent content by Omni

  1. Omni

    have you simple digital volume control

    Maxim released another excellent stereo audio vol/balance IC that is very versatile, take a few minutes to review the data. http://www.maxim-ic.com/quick_view2.cfm/qv_pk/5288
  2. Omni

    RC mini Helicopter

    audioguru is completely correct in his view! In the event you are interested in RC helicopters about the best advice i can give is to STOP viewing the short mpeg video clips provided by many manufacturers! The latter outlets use highly professional (seasoned) RC pilots that make it look...
  3. Omni

    Small FM Transmitter 1965!

    FM transmitter's of that type can be very directional. You could also add a powered Omnidirectional Microphone for added preamp gain (very sensitive).  :)
  4. Omni

    89LPC936.....neone workin on this .....????

    Take a couple of hours and review the data sheet .pdf for each device.  :)
  5. Omni

    Negative resistance experiment

    Hello AN920, You could also review quantum tunneling which has a very similar outline. Where the wavelength of a particle's wave function is inversely proportional to the momentum of the electron. The concept behind negative resistance has been discussed a long time ago; noted in...
  6. Omni

    Your next lawn mover!

    Wait a second... Remember, fuel cost!  ;D
  7. Omni

    Commodore 64 repairing gone forgotten?

    Haha, I must admit i tend to avoid a big confrontation when silicon is concerned... When i received my degree the class was just starting to delve into transistor theory.  :o Within the University i continued to attend, advancing my degree during the evening curriculum but as everyone is aware...
  8. Omni

    0-30 Vdc Stabilized Power Supply

    Hi Pawel_K I was finally able to view your pics. When viewing the NS (near-side) of the PWA (printed wiring assembly) i noticed two resistors that may be incorrect. 1. Lift one side of R7, using a VOM measure the resistance it should measure 0.47 ohms or 1/2 an ohm (not 47 ohms).    You may...
  9. Omni

    Car battery to parallel port

    Hi TJBraza, http://www.analog.com/UploadedFiles/Data_Sheets/ADT7485A.pdf Although, it will probably require a small program written in C or Visual basic to convert the string  MSB & LSB into a more easier read etc... Take a moment and review the data sheet, the IC has a lot of potential.
  10. Omni

    0-30 Vdc Stabilized Power Supply

    Hi AN920, I have to agree on your analysis concerning the biasing (quiescent point) of the TIP31A in reference to the error amplifier outlined. A TIP31A is usually implemented as an output transistor and/or as a complement to the TIP32A etc... A transistor with a faster response would be a...
  11. Omni

    0-30 Vdc Stabilized Power Supply

    Sorry, but i am unable to view the pics; Java? You should upload your pictures to Photobucket (or similar hosting server) then provide the URL etc... The supply does operate properly but i must admit i jumped on Audioguru concerning a current issue and he may be correct. Yesterday, when viewing...
  12. Omni

    HELP!!!I NEED YOU ALL

    Hi Etinios, Your professor must have provided more information concerning the planned project. I believe more detail is required for the forum to provide direction. -Omni
  13. Omni

    microwave oven service manual

    The cathode is generally pulsed with a negative potential using a HV DC source, within the core of a circular chamber the latter cathode is placed. Angular to the core a magnetic field is constructed which in turn allows the electrons to spiral out in a circular pattern to the anode. Provided...
  14. Omni

    Automatic Toilet paper roller and Cutter

    When the start button is depressed a three part timing cycle occurs. 1. Main motor begins to feed the paper CW. 2. After a few seconds the lower motor begins to turn CCW to wrap the paper. 3. Once the latter length is achieved the first two events end and the cutting tool completes the tear...
  15. Omni

    Commodore 64 repairing gone forgotten?

    Hi AN920, I admire your candor! You appear very young in your Avatar picture. In the event it is authentic than you will have a lot to give to the younger engineering community because of your age!  :) God bless, -Omni
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