78XX and 79XX negative positive regulator ICs, you can easily supply circuit with the series regulator circuits. This circuit gives a nice symmetrical +-15v output printed circuit desing there is a list of the material scope of the pcb,... Electronics Projects, 15V Symmetrical Power Supply Circuit 7815 7915 "power electronic projects, power supply circuit, power supply project, simple circuit projects, " Date 2019/08/03