-8-
ASSEMBLE COMPONENTS TO THE PC BOARD
Care must be given to identifying the proper components and in good soldering habits. Place a check mark in
the box after each step is complete.
VR1 - 250k
Ω
Potentiometer
(see Figure B)
C1 - .082
μ
F 200V Capacitor
D2 - 1N4004 Diode
(see Figure C)
D1 - 1N4004 Diode
(see Figure C)
Figure C
Diodes have polarity.
Mount them with the
band in the correct
direction, as marked on
the PC board.
Figure A
Mount the triac as shown. Bend the triac 90
O
. Solder and cut
off excess leads.
Figure B
Mount the potentiometer
as shown. Solder and
cut off excess leads.
TR1 - Triac BTA12400B
(see Figure A)
D3 - Diac DB3
R1 - 15k
Ω
5% 1/4W Resistor
(brown-green-orange-gold)
IDENTIFYING RESISTOR VALUES
Use the following information as a guide in properly identifying the
value of resistors.
IDENTIFYING CAPACITOR VALUES
Capacitors will be identified by their capacitance value in pF
(picofarads), nF (nanofarads), or
μ
F (microfarads). Most capacitors
will have their actual value printed on them. Some capacitors may
have their value printed in the following manner.
For the No.
0
1
2
3
4
5
8
9
Multiply By
1
10 100 1k 10k 100k .01 0.1
Multiplier
1
2
Multiplier
Tolerance
BANDS
Second Digit
First Digit
Multiplier
Tolerance
103K
100V
Maximum
Working Voltage
The value is 10 x 1,000 = 10,000pF or
.01
μ
F 100V
The letter M indicates a tolerance of +20%
The letter K indicates a tolerance of +10%
The letter J indicates a tolerance of +5%
Note:
The letter “R” may be used at times
to signify a decimal point; as in 3R3 = 3.3
