AC to DC converter

Discussion in 'The Projects Forum' started by O'Malley, Feb 14, 2012.

  1. O'Malley

    Thread Starter New Member

    Feb 14, 2012
    presently using 3 9volt batt. to produce 27 volts to generate current to 2 silver rods going into herbal formula long term not cost effective, Please-need to make a converter from my wall socket 1110/120 volt AC to 27-36volt DC connected to the silver rods going into liquid formular,help? thanks O'Malley
  2. Mark_T


    Feb 7, 2012
    Be carefull with mains if you've not designed before, but all you need (Assuming your formula is watery type liquid) is a mains transformer to something like 18 to 25V AC and a bridge rectifier and capacitor. Standard unrgulated PSU, the DC you get out will be higher than the AC stated if you have low a low current flowing. Need to know current flowing in order to calculate the size of transformer but sounds like it may be smallish.
    A fuse on the input will be a good idea! Or a current limiting resistor if there is a chance you may short the rods together.
    O'Malley likes this.
  3. crutschow


    Mar 14, 2008
    You likely just need a transformer of the desired voltage and current rating, and a bridge rectifier. Since it's going to silver rods, it likely won't mind pulsating DC, so you wouldn't need a capacitor filter.
  4. mcgyvr

    AAC Fanatic!

    Oct 15, 2009