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  1. Replies
    2
    Views
    3,119

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    Hi,

    You wonít be able to cover an entire hemisphere but it's a starting point.

    http://www.youtube.com/watch?v=aQ_oJaCmmpw
    (Some models can transmit on any FM frequency from 87.5 to 108.0).
    ...
  2. Replies
    10
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    6,378

    Hi, Your microcontroller is a 8051-compatible...

    Hi,

    Your microcontroller is a 8051-compatible chip made by Atmel.
    The original 8051 chip was developed by Intel in 1980.

    http://en.wikipedia.org/wiki/Intel_8051


    The Microchip PIC and...
  3. Replies
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    6,378

    Hi, Your chip is an Atmel microcontroller...

    Hi,

    Your chip is an Atmel microcontroller using the 8051 Architecture.

    Where to get the datasheet:

    8051 Architecture - Devices
    http://www.atmel.com/dyn/products/devices.asp?family_id=604
  4. Thread: RF Modules

    by Luciano
    Replies
    44
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    27,223

    Hi, (what I understand from the manual)....

    Hi,

    (what I understand from the manual).
    http://www.sure-electronics.net/rf,audio/GP-GC010.pdf

    The baud rate is 19200. The module has a TX buffer of 64 bytes.
    When you send, the data (up to...
  5. Replies
    6
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    3,530

    Hi, See this link: ...

    Hi,

    See this link:
    http://www.linusakesson.net/scene/craft/index.php

    Best regards,

    Luciano
  6. Replies
    29
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    19,539

    Hi, Distributed Power factor correction (PFC):...

    Hi,

    Distributed Power factor correction (PFC):
    http://www.drasa.co.za/news_articles_detail2.html

    (From the above link)

    If a customer only applies PFC at the utility metering point then a...
  7. Replies
    16
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    12,644

    Hi, Einstein's Theory of Relativity? * * *...

    Hi,

    Einstein's Theory of Relativity?

    * * *

    Crystal Considerations with Dallas Real-Time Clocks (RTCs)
    http://pdfserv.maxim-ic.com/en/an/AN58.pdf

    Considerations for Maxim Real-Time Clock...
  8. Replies
    16
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    12,644

    Hi, A 5$ wristwatch is warmed by your body. ...

    Hi,

    A 5$ wristwatch is warmed by your body.
    (The body temperature is constant).

    Best regards,

    Luciano
  9. Replies
    51
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    23,445

    Hi, The only problem I can see is that your...

    Hi,

    The only problem I can see is that your LED modules will
    have to produce the same light intensity. This is going to be
    important when the LED modules are mounted close to each
    other and...
  10. Replies
    51
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    23,445

    Hi, "Tru Semi" is Rapid Electronics which is...

    Hi,

    "Tru Semi" is Rapid Electronics which is not a semiconductor maker.
    Try the URL www.trusemi.com and you will be linked to Rapid Electronics.

    Is the quality OK?
    Can Rapid Electronics test...
  11. Replies
    51
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    23,445

    Hi, If the quality of the datasheet reflects...

    Hi,

    If the quality of the datasheet reflects the quality of the product....
    http://www.rapidonline.com/netalogue/specs/47-5512.pdf

    Compare the above datasheet with the datasheet of the MPSA14...
  12. Replies
    51
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    23,445

    Bitter taste over China baby milk...

    Bitter taste over China baby milk
    http://news.bbc.co.uk/2/hi/asia-pacific/7620812.stm
  13. Replies
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    23,445

    Hi, Will be the transitor better than the baby...

    Hi,

    Will be the transitor better than the baby milk?

    Best regards,

    Luciano
  14. Replies
    51
    Views
    23,445

    Hi, The datasheet I have posted is the...

    Hi,

    The datasheet I have posted is the datasheet of the MPSA13 and the MPSA14.
    http://www.rapidonline.com/netalogue/specs/81-0142.pdf

    The first page of the datasheet is added by Rapid. If you...
  15. Replies
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    23,445

    Hi, The MPSA14 is a Darlington transistor....

    Hi,

    The MPSA14 is a Darlington transistor. (See datasheet page 1).

    http://www.rapidonline.com/netalogue/specs/81-0142.pdf


    The Darlington transistor (often called a Darlington pair) is a...
  16. Replies
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    23,445

    Hi, Use that:...

    Hi,

    Use that:
    http://img440.imageshack.us/img440/8364/led5nc5.png

    Datasheet MPSA14 DARLINGTON TRANS NPN:
    http://www.rapidonline.com/netalogue/specs/81-0142.pdf

    Best regards,
  17. Replies
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    23,445

    The power MOSFET IRLR/U2905 has logic-level gate...

    The power MOSFET IRLR/U2905 has logic-level gate drive and
    therefore you don’t have to worry about that. Just try and
    measure the voltage drop.
  18. Replies
    51
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    23,445

    Hi, From the datasheet. The thermal resistance...

    Hi,

    From the datasheet. The thermal resistance junction-to-ambient is for when
    there is no heatsink.

    IRLR/U2905 datasheet:
    http://www.irf.com/product-info/datasheets/data/irlr2905.pdf
    ...
  19. Replies
    51
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    23,445

    Hi, The power dissipated in a MOSFET is the...

    Hi,

    The power dissipated in a MOSFET is the voltage across it times
    the current going through it.

    The voltage across the MOSFET when it is on will be the
    resistance of the MOSFET, Rds(on)...
  20. Replies
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    23,445

    Hi, The choice of using 17 LED's is not going...

    Hi,

    The choice of using 17 LED's is not going to help you
    if you connect groups of LED's in series.

    * * *

    With the PWM you can control the brightness of the LED's.
    With or without PWM the...
  21. Replies
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    23,445

    Hi, Use a power MOSFET with logic-level gate...

    Hi,

    Use a power MOSFET with logic-level gate drive.

    This is what I use for my lamp:
    http://img525.imageshack.us/img525/6549/led1dc2.png

    If you use a 12V supply use that:...
  22. Replies
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    23,445

    Hi, Use a power MOSFET with logic-level Gate...

    Hi,

    Use a power MOSFET with logic-level Gate Drive.
    (You can drive it directly with the I/O of the microcontroller).

    For my Stereo microscope ring light (warm white LED's) I use
    IRLR/U2905...
  23. Replies
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    10,056

    Hi, (Update) 'Jet Man' Yves Rossy rockets...

    Hi,

    (Update)

    'Jet Man' Yves Rossy rockets into record books with first solo flight over Channel ...
  24. Thread: mister_e

    by Luciano
    Replies
    35
    Views
    13,747

    Hi Sayzer, The text I posted was not written...

    Hi Sayzer,

    The text I posted was not written by mister_e.
    (I thought it was obvious).

    * * *

    Stop worrying about him and focus on real life.

    Best regards,
  25. Thread: mister_e

    by Luciano
    Replies
    35
    Views
    13,747

    View Post

    (From the WEB).

    Iíve decided that Iíve been spending too much time on a few different Internet forums.
    I probably spend too much time on the Internet period. Itís become an addiction and that ...
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