Operation - Elenco Electronics AK-100/SP-1A Assembly And Instruction Manual

PC BOARD ASSEMBLY (continued)
Solder the following parts to
the PC board.
R3 - 68Ω 5% ¼W Resistor
(blue-gray-black-gold)
(see Figure E)
R2 - 1kΩ 5% ½W Resistor
(brown-black-red-gold)
(see Figure E)
C2 - 10μF Electrolytic (Lytic)
(see Figure B)
Q1 - 2N3904 Transistor
Q2 - 2N3904 Transistor
(see Figure G)
LED1 - Light Emitting Diode
(see Figure H)
Figure F
Cut a 1" wire and strip 1/8" of
insulation off of both ends.
Cut the 12" wire in half and the strip
1/8" of insulation off of both ends.
Insert the speaker wire through the
PC board as shown. Then, insert
the wires into the speaker holes
and solder. Solder the other end of
the wires to the speaker.

OPERATION

After completing the assembly of the kit, double back to see that the soldering looks good and all of the
components are in their proper place. If everything is all right, attach the 9V battery to the battery snap. The
LED's should alternately light and the speaker should sound a wobbling siren.
Continue to the Desoldering Practice/Component Replacement Secton.
Note: Refer to the Troubleshooting Section if your circuit does not work.
Figure G
Mount the IC with the flat side in the
same direction as marked on the PC
board. Leave about 1/8" of space
between the transistor and the PC
board as shown below. Solder and
cut off the excess leads.
Flat
1/8"
-12-
R5 - 47kΩ 5% ¼W Resistor
(yellow-violet-orange-gold)
(see Figure E)
R4 - 22kΩ 5% ¼W Resistor
(red-red-orange-gold)
(see Figure E)
C4 - .02μF or .022μF Discap
C1 - 10μF Electrolytic (Lytic)
(see Figure B)
R1 - 470Ω 5% ¼W Resistor
(yellow-violet-brown-gold)
(see Figure E)
Jumper Wire (see Figure F)
LED2 - Light Emitting Diode
(see Figure H)
Figure H
Mount the LED onto the PC board
with the flat side of the LED in the
same direction as marked on the PC
board. Be sure to mount the LED
flush with the PC board as shown
below.
Solder and cut off the excess leads.
Mount Flush
to PC Board
Flat