In this series of essentially the same principle with the power supply, but power supply is working to produce high voltage. And high voltage which is regulated by this series becomes more filtered and either used for electronic devices that are not easily damaged. High Voltage regulator schematics Component List R1_____________1K R2_____________470K R3_____________330K R4_____________20K C1_____________39uF 450V C2_____________39uF 450V C3_____________39uF 450V C4_____________39uF 450V C5_____________10uF 25V C6_____________220nF 250V C7_____________100nF 400V D1_____________1N4007 D2_____________1N4007 D3_____________1N4007 D4_____________1N4007 D5_____________1N4148 D6_____________1N4148 TR1____________MJE13005 TR2____________MPSA92 TR3____________MPSA42