Dual linear regulator +15V -15V by Transistor Only

When friends want Dual Regulator +15V GND -15V. Usual like to to use the integrated circuit LM7815 and LM7915. But sometimes seek the integrated circuit no will do ? Today I leads old circuit , but be worthy give friends. Try out the one choice use the transistor and Zener Diode 15V can use be Dual Regulator +15V GND -15V get also. Although complicated more but economize and seek easy equipment certainly. For equipment other list friends can seek pay back can. such as Q1 2N4053 use the number BD140 can replace Q2 - 2N3446 use the number BD139 can replace. Seek buy easy and the price is inexpensive. Request friends have fun Dual linear regulator +15V -15V Circuit , please yes.

Power Supply   Switching Power Supply   DC to DC Converter   Inverter
Battery charger   Led flasher   Motor speed controller   LM317   IC 741
RF radiofrequency   Electronic control   Digital Circuit   Alarm home system
DC to DC converter step up voltage   Mini project   Temperature control
FM receiver   Dual power supply   Fluorescent lamp   Pic microcontroller
Led display   RF amplifier   FM transmitter   LM324   LM723   TL494
2N3055   LM338   SG3525   Li-ion battery charger   Pulse generator

Circuit Project Electronic

Dual linear regulator +15V -15V by Transistor Only