project

Discussion in 'General Electronics Chat' started by vijaytej, Jan 23, 2015.

  1. vijaytej

    Thread Starter New Member

    Jan 11, 2015
    11
    0
    hello guys.... can you please help me by suggesting a topic for a mini project in analog electronics.......
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,100
    3,036
    Turn on a flashlight?
     
  3. atferrari

    AAC Fanatic!

    Jan 6, 2004
    2,648
    762
    On and off better. Battery, you know...
     
  4. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
    2,802
    832
    That's a digital project.
     
  5. GopherT

    AAC Fanatic!

    Nov 23, 2012
    6,010
    3,785
    IR LED / Phototransistor distance sensor. Use reflected beam and intensity of reflected beam to correlate to distance. Use a pulsed LED to insure ambient room light does not interfere. Voltage of amplified output correlates to distance.
     
  6. ScottWang

    Moderator

    Aug 23, 2012
    4,853
    767
    A bjt oscillator as astable oscillator, you can google it.
     
    Last edited: Jan 23, 2015
  7. ian field

    Distinguished Member

    Oct 27, 2012
    4,413
    782
    The Wien-bridge oscillator is an old favourite:

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

    Getting the amplitude stabilisation to work well is the cherry on the top.
     
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