Overcurrent Protector?

Discussion in 'The Projects Forum' started by arjayfall, Dec 29, 2013.

  1. arjayfall

    Thread Starter New Member

    Dec 29, 2013
    1
    0
    Hello guys,
    So I'm currently working on a fingerprint-security system on a motorcycle. The security system is perfectly working. But my problem is the power source. In order to power-up my system properly, i need to supply it with another battery source because if i use the motorcycle's battery my security system would reset when starting up the motorcycle. My mentors really challenges me to device a powersupply circuit that would only use the motorcycle's battery and would not reset my system during ignition..

    I'm hoping for suggestions for a power supply circuit that would conquer this problem..

    Thanks!! ;) God Bless
     
  2. inwo

    Well-Known Member

    Nov 7, 2013
    2,433
    315
    Feed from a diode into appropriate capacitor?
    Without another battery, what is there?
    A flywheel? :)

    ps.
    What's with the title?
     
  3. aq_rules

    Member

    Oct 28, 2009
    168
    0
    What input is required by your security system?
     
  4. crutschow

    Expert

    Mar 14, 2008
    12,990
    3,226
    Tap into the ignition power, since that voltage isn't interrupted when starting. Then add a series diode feeding a large capacitor to maintain the system voltage due to the battery voltage drop from the starter current.
     
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