Need Help For Voltage Drop

Discussion in 'General Electronics Chat' started by NIght Eagle, Sep 9, 2009.

  1. NIght Eagle

    Thread Starter New Member

    Sep 8, 2009
    1
    0
    Hello Forum ,
    I am Newbe in Electronics . I Have a Transformer Of 12V 6A . I Want to Use it in DC 1.5V 300mA Circuit . How Can I Drop the Voltage & Ampire ? Please Help & Show Me With a Schematic Diagram .

    -Thanks
    -Night Eagle
     
  2. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Does your "transformer" have an AC or a DC output? In other words, is it a regulated 12v DC power supply, or is it an unregulated AC output?
     
  3. steinar96

    Active Member

    Apr 18, 2009
    239
    4
    The transformer you have most likely drops the mains 230V or 110V down to 12 volts. The output of this is a AC waveform which you need to rectify and regulate in order to get DC. Look up "full bridge rectifier" for this.

    1.5V is a rather, annoying voltage to get from a single supply. But you could propably use a linear regulator to get the voltage down to 5V. After which you could use a voltage divider assuming the load is very constant (not a good idea if the load is changing alot due to bad regulation.

    But out of curiosity. What are you building ?. And can you not use a battery ?
     
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