When I builds the circuit Pre tone control by IC LF353 the finished , but can not be usable. Because of it wants a power supply +15V GND -15V at 500mA current. I pairs then builds the group three dual 15v power supply schematic with PCB +15V,GND,-15V.
Power supply regulator +15V -15V 1A by IC 7815 & 7915
By use pillar equipment be IC 7815 , for +15V and IC 7915 for -15V. Which IC the bilateral can give currrent get about 1A. Other detail both of the circuit and model PCB you can see to follow a image.
The transformer should have a primary rating of 240/220 volts for europe, or 120 volts for North America. The centre tapped secondary coil should be rated about 18 volts at 1 amp or higher, allowing for losses in the regulator. An application for this type of circuit would be for a small regulated bench power supply.
The components list
IC1___LM7815___Positive Regulator IC
IC2___LM7915___Negative Regulator IC
C1,C2____2,200uF 35V___Electrolytic capacitors
C3,C4,C7,C8____0.1uF 50V-0.22uF 50V Ceramic capacitors
C5,C6____100uF 25V___Electrolytic capacitors
T1___Transformer 15V CT 15V or 18V CT 18V 0.5A to 1A
How to builds this circuit.
This circuit is easy so can assemble on perforated board or Universal PCB board. as Figure 2
and can see video testing circuit.
2. Dual DC Regulator 15V using C1061 and A761
A friend of me you one take an interest a side Sound Audio the very. He takes an interest to want to build Pre tone Control which use the integrated circuit OP-AMP. By these circuit often use power supply Model Dual DC Regulator which have Voltage Value about +15V Ground and -15V.
I then advise to give him chooses to use the integrated circuit number LM7815 and LM7915 because good convenient. But in sometimes using integrated circuit inappropriate suit follow the situation that. Such as seek buy the integrated circuit no, the expensive etc.
I then advise Dual DC Regulator 15V using Transistor C1061 and A761. Because use Transistor all , seek easy and sometimes you still antiques sheep comes to use can replace. By Transistor use get many the number , TIP41,TIP31,MJE3055 , and , TIP42,TIP32,MJE2955 etc.
Unless still systematically protect through the circuit with. And still give current about 1A-2A as well. Almost forget friends must use transformer 1-2A size with. And me press model PCB for the convenience of friends with. Request have fun Dual DC Regulator 15V using C1061 and A761 , please sir.
PCB Dual DC Regulator 15V using C1061 and A761
3. 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.
If you think that This circuit is not good enough. For your work. It is hard to find equipment. You do not have it now. These circuits may be viewed below. It may be appropriate for you.