-4-
ASSEMBLE COMPONENTS TO THE PC BOARD
P1 - Probe (see Figure A)
H1 - Twisted Wire (see Figure B)
B1 - Battery Snap
(see Figure C)
D1 - LED Red (see Figure D)
S2 - SPDT Slide Switch
T1 - Transformer
Insert the transformer into the PC board
as shown. Solder the four leads into place
and cut off the excess leads.
R2 - 47k
W
5% 1/4W Resistor
(yellow-violet-orange-gold)
R1 - 470
W
5% 1/4W Resistor
(yellow-violet-brown-gold)
SCR1 - C106B SCR
(see Figure E)
S1 - Push Button Switch
Figure A
Assemble the probe (P1). Solder an excess
lead from the resistors to a side of the double
sided PC board. Leave 1/2 inch extending from
the end. Form a loop at the end of the wire.
Cut two 9 inch wires and strip 1/2 inch of
insulation off of both ends. Solder a wire to
each side of the double sided PC board. Insert
the other ends of the wires in the holes marked
P1. Solder and cut off the excess leads.
Figure B
Bend the 9” bare wire into the shape as shown
below. Insert one end of the wire into the PC
board, in the hole marked H1 and solder into
place.
Figure C
Insert the battery snap wire through the PC
board as shown. Then, insert the red wire
into the positive (+) hole and the black wire
into the negative (–) hole. Solder and cut off
the excess leads.
Figure D
Mount the LED with the flat side of its body
in the direction as marked on the top
legend. Leave 1/4” between the LED and
the surface of the PC board. Solder and cut
off the excess leads.
Figure E
Mount the silicon controlled rectifier (SCR)
with the back side (metal backing) in the
same direction as the marking on the PC
board as shown.
B1
Flat Side
1/4”
Back Side
PC Board
Marking
PC Board
Marking
B
A
