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
    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 .

    -Night Eagle
  2. SgtWookie


    Jul 17, 2007
    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
    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 ?