Precison Power Supply, 0-40V/2A

[uydudoktoru]

Parts List:
Resistors:
All resistors are 1/4W unless otherwise indicated
R1 = 1K2 RV1,RV2 = 5K R
2 = 7K5 RV3 = 500 ohm
R3 = 15K RV4 = 100K
R4 = 160 Ohm
P1 = 50K, Bourns, 10-turn potentiometer
R5,R6 = 0.22 ohm, 5W
P2 = 500 ohm potentiometer
R7 = 10K, 1W R
8 = 180K R
9 = 330K, 1WN

ote: R5 and R6 are "wire-wound" types

Capacitors:
C1,C2 = 2200uF, 100V, electrolytic
C3 = 1500uF, 50V, electrolytic
C4,C7 = 0.1uF, 25V, ceramic
C5 = 10pF, 25V, ceramic C
6 = 240pF, 25V, ceramic
C8 = 100uF, 100V, electrolytic
C9 = 22nF (0.022uF), 100V, polyester or similar

Semiconductors:
D1-D8 = 1N4007 Br1 = 6A, 200V
Bridge Rectifier, KBPC102 or similar
Br2 = 1A, 50V Bridge Rectifier, MDA100A or similar
1 = TIP31C, NPN power transistor
TO-220 (NTE184)
Q2 = 2N6385, NPN power transistor, T
O-3 (NTE245) IC1 = MC1466L, p
recision regulator IC, 14-pin DIL (no known substitute) L
ed1 = LED, your choice on/off indicator

Miscellaneous:
T1/T2 = Transformer with two windings; 17VAC/300mA, and 36VAC/3A (JS-92-096) (or two separate transformers, but will take more space) S1 = SPDT, Power on-off switch (the Led1 for on/off can be part of S1)J1,J2,J3 = Binding posts, one Red (+), one Black (-), one green (Gnd.) Knobs = 2 knobs for voltage and current potentiometersOther:Heatsink for transistors Q1 and Q22 meters 250uA (microAmp) eachCabinet or enclosure Hammond 1458 series.