Simple Regulator By Transistor (C1061) DC Power Supply 1.25V to 25V DC Power Supply by 78xx Supply 9VDC no transformer Regulator +15V -15V 1A by IC 7815 & 7915 Switching Power Supply by IC UC3843 + IRF740 Simple power supply regulator 12V 15V 30V by Zener diode Power supply regulatable 0-28V 20Amp By LM317 and 2N3055 Voltage Reference by IC LM334 Supply Voltage Indicator Power Supply Regulator 0-30V 5A by LM723 +CA3140+2N3055 9 Volt 2 Amp Power Supply by 78S09 Voltage Detector by IC TL431 ADJUSTABLE REGULATOR by IC TL431 Back page 1 NEXT page 3