Dual Polarity Power
Supply
This dual polarity power supply is easy to build, requires few parts, and
is adjustable from 0-15 volts. It is great for powering op amp circuits, as well
as other circuits that require a dual supply voltage
Schematic
Parts:
Part |
Total Qty. |
Description |
C1,
C2 |
2 |
2200uF 35V
Electrolytic Capacitor |
C3, C4, C5,
C7 |
4 |
1uF 35V Electrolytic
Capacitor |
C6,
C8 |
2 |
100uF 35V Electrolytic
Capacitor |
R1,
R4 |
2 |
5K
Pot |
R2,
R3 |
2 |
240 Ohm 1/4 W
Resistor |
BR1 |
1 |
2A |
U1 |
1 |
LM317 Adjustable
Positive Regulator |
U2 |
1 |
LM337 Adjustable
Negative Regulator |
T1 |
1 |
|
S1 |
1 |
SPST 2 Amp
Switch |
MISC |
1 |
Heatsinks For U1 And U2, Line Cord, Case, Knobs For
Pots, Wire |