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How to reset this ic without any switch....

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by yusuf, Sep 29, 2011.

  1. Jammy

    Jammy New Member

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    OK friend thanks for your advice but I have seen this transformer-less power supply in many instruments / product as it is cost effective.


    My relay :

    Resistance : 200 ohms
    Voltage : 12 volt
    Contact : 10 Ampere
     
  2. alec_t

    alec_t Well-Known Member Most Helpful Member

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    What has that to do with safety? I repeat: it is potentially lethal.
    Ignore my advice at your peril. I doubt I will be hearing from you again.:(
    BTW, why did you reincarnate yourself as Jammy, Yusuf?
     
  3. yusuf

    yusuf Member

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    Alec Have two account on this forum because sometimes I can't post with my yusuf account So I have created another jammy account for emergency.

    well, So is there any alternative idea to make power supply which is safe..
     
    Last edited: Nov 17, 2011
  4. dave

    Dave New Member

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  5. alec_t

    alec_t Well-Known Member Most Helpful Member

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    It will probably be cheaper, and more reliable, to buy a 12VDC wall-wart type supply rather than to make your own. If you intend to use that to power the timing part of your circuit as well as the relay (though I would advise you to use a fresh 6V or 9V battery instead for the timing part, to reduce noise pick-up) then you will also need a voltage regulator (e.g. 7805) and smoothing/decoupling capacitors.
     
  6. yusuf

    yusuf Member

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    Thanks alec for your help... :)
    If you would be near me in india then i should give you gifts for helping me..
    Because you have helped me a lot.. But i am sorry because i can't send gifts outside the india..
    :-(

    Friend now I want to create : 10 minutes ON and 30 minutes OFF timer..
    Do you have circuit or how do i make this alec.. Any idea.. :)
     
    Last edited: Nov 18, 2011
  7. alec_t

    alec_t Well-Known Member Most Helpful Member

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    Glad to have helped.
    I suggest you start a new thread for this new timer. The present thread has got rather long !
     
  8. yusuf

    yusuf Member

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    Ok Alec I have created a new thread with name : Help required to complete ????

    Please come there and help....
     
  9. yusuf

    yusuf Member

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    Hi alec...
    How are you ! :)

    Fried my battery was low so I replaced with new 10 volt battery..

    but the problem As I connect the battery the 3hr timer starts to run without
    clock pluse or manual start ...

    But If I use the 9v old battery which gives something 7 volt(because it is old)..

    The 3hr timer doesn't starts untill I manually start or untill it gets clock pluse..
    As it gets clock pluse it starts to run...

    But with new one battery it starts as I connect the battery...

    I hope this is a big problem !!

    Thanks for your co-operation uptill now !

    Thanks in advance !

    Yusuf
    :)
     

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