12V 1A Power Supply  (277-0104)     Parts List         Faxback Doc. # 9521

This Project Board can be used to power most auto accessories - RADIOS,
TAPE DECKS, C.B. UNITS, WALKIE TALKIES - anything that operates as 12
volts and 1 amp!  By changing the resistor string on the output, the
creative experimenter can obtain fixed voltages of 7 to 12 volts.  The
circuit contains a voltage doubler that enables it to provide a well
regulated output, even with low line voltages!

This package contains a complete printed circuit board - ready for parts
to be added.  To construct this PROJECT BOARD, you'll need the following
parts:

                                                             Radio Shack
Symbol           Description                 Quantity          Cat. No.

C1, C2      22uF 36V Electrolytic                2             272-1026
            Capacitor (PC)

C3          3300uF 35V Electrolytic              1             272-1021
            Capacitor (Axial)

C4          220uF 35V Electrolytic               1             272-1029
            Capacitor (PC)

CR1, CR2,   1 Amp/50PIV Diode                    4             272-1101
CR3, CR4

CR5         1 W 6 V Zener Diode                  1             276-0561

F1          1.5 A Slo-Blo Fuse                   1             270-1284

L1          12 Volt Panel Lamp (w/mounting)      1             272-0322
            clip)

Q1          Transistor RS2019 type               1             276-2019

Q2          Transistor RS2009 type               1             276-2009

R1          680 Resistor (blue, gray, brown)     1             271-0000

R2          1.5 K Resistor (brown, green, red)   1             271-0000

R3          1 K Variable Resistor (Trim Pot)     1             271-0227

R4          2.2 K Resistor (red, red, red)       1             271-0000

S1          Push-on, Push-off Switch SPST        1             275-0011

T1          Transformer 25.2Vct/2A               1             273-1512

            Case (Chassis)                       1             270-0252

            Fuse Holder                          1             270-0364

            Nylon Binding Post                   2             274-0662

            No. 22 Hook-up Wire                                278-1307

Plus hardware, tools, and solder.  The Case listed above is a recommended
Chassis in which to mount the Project.  You might prefer other mounting
styles - select your own.

(ALL-01/25/95)