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the prettyLow Drain Flasher circuit with BJT

Discussion in 'General Electronics Discussion' started by baba101, Nov 15, 2017.

  1. baba101

    baba101

    4
    0
    Nov 15, 2017
    Here I present a very low drain circuit .

    This is led flasher at .7sec delay ... takes .89mA

    Please confirm if my measurement is correct .

    Feature :
    works from .7V also
    just two value resistor cover wide vcc

    for .7 - 3v keep Rx 220E
    and for 5-16V Rx is 47k
     

    Attached Files:

  2. 73's de Edd

    73's de Edd

    2,740
    1,128
    Aug 21, 2015
    Explain how the "LEAKY" 47 ufd electrolytic, being inserted into the power supply input line, to feed the circuitry, fits into the grand scheme of the units design plan ?
     
  3. baba101

    baba101

    4
    0
    Nov 15, 2017
    great catch.. that one helps it to start Off, else needs a dab of voltage to make it , probably a diode in series will help cut the leak ?
     
  4. Audioguru

    Audioguru

    2,618
    593
    Sep 24, 2016
    Can't you see that the polarity of the 47uF capacitor is backwards?
     
  5. baba101

    baba101

    4
    0
    Nov 15, 2017
    sorry diagram error.it is to be reversed
     
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