Lab project with BJT

Discussion in 'Homework Help' started by ibm123, May 24, 2009.

  1. ibm123

    Thread Starter Member

    May 13, 2009
    17
    0
    hello
    i need to do a lab project using transistors..

    i'm looking for ideas what can i make.. i dont want to many
    components..
    lets say about 5-15

    if you can help me with the design also it will be great
    thank you

     
  2. bertus

    Administrator

    Apr 5, 2008
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  3. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    A simple but practical audio amp comes to mind, but that is just the beginning.

    You can make with two transistors...

    A power supply.
    An electronic load (to test power supplys).
    An audio amp.
    An RF transmitter (be aware of the laws in your country concerning this).
    A simple siren
    Two blinky lights, either LEDs or light bulbs.
    An SCR.


    Schematics I don't have anymore include a chirping bird or a cricket.

    The 300 in 1 electronics kits are good for ideas like this.
     
  4. ibm123

    Thread Starter Member

    May 13, 2009
    17
    0
    at first i thought about doing a "light burn notifier"
    but it was to hard for me to make it on pspice

    so now i though maybe to do an 4 RLC lines
    with a led in paralel to each trnasistor
    than sweap the frequency
    and in 1k,3k,5k,7k each led will turn

    the transistor will be like an current amp that way the resistors could be small and the B.W will be also very small

    do you think my idea will work ?

    do you have any other ideas ?
    thank you
     
  5. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,536
    That would work. Think Wien Bridge filters, and you have a simple light organ.

    It'll take more than a few transistors, but you can get packs pretty cheap, even from Radio Shack.
     
  6. ibm123

    Thread Starter Member

    May 13, 2009
    17
    0
    i get what i need for free from my uni..

    why would i need more then one ?
     
  7. ibm123

    Thread Starter Member

    May 13, 2009
    17
    0
    on the left is a current amp
    how can i connect them so that peak on the resistors will grow ?

    thank you
     
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