By selecting capacitors, various voltages can be obtained from this supply. Notice that C2 through C7 must be
nonpolarized capacitors, such as oil-filled or foil types (Mylar) rated for at least 250 Vac. Warning: This supply is not isolated from the ac mains and presents a serious safety hazard if body contact is made anywhere to this circuit or anything that is powered by it. Use only for applications where contact is avoided or impossible.