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R
R .....Ω
C .....µF
C
TRANSISTOR
Watch the polarity!
JUMPER
E
J
NPN
+
C
+
C
B
Figture 2.
Two way chasing light
two colour 10 LED circuit
+
J
JUMPER
OR
TR
1N4148
A
K
LED
VR .....KΩ
IC 4017
3
1
LED
2
VR
VR
VERTICAL
HORI
ZONTAL
VR
VR
1
IC
Watch the position
of the notch!
A2
A2
A2
A2
A1
LED
A1
LED
A2
A2
A1
LED K
A2
red +
+
black -
9V
+
2
BATTERY
9V
+9V
+
1
GND
1
Troubleshooting:
The most problem like the fault soldering. Check
all the soldering joint suspicious. If you discover the
short track or the short soldering joint, re-solder at that
point and check other the soldering joint. Check the
position of all component on the PCB. See that there are
no components missing or inserted in the wrong places.
Make sure that all the polarised components have been
soldered the right way round.
HIGH QUALITY ELECTRONIC KIT SET FOR HOBBY & EDUCATION
A2
A2
A1
A1
LED LED
JUMPER
A2
A1
A1
A1
LED LED LED
JUMPER
A2
K
Figture 3. Connections
A1
LED
JUMPER
A1
A1
K LED
JUMPER
TRIMMER
POTENTIOMETER
FK157-1
JUMPER
K
A1
A2
red K green
LED
JUMPER
K
A
JUMPER
A
5 mm.
TWO COLOUR
JUMPER
DIODE
J
JUMPER JUMPER
TR
D
This circuit is the chasing light circuit. The light is
chasing saperate from the center (red colour) and
return to center (green colour). This circuit is consist of
3 LEDs of 5 mm. tri-LED. Idea as light-shows for model
construction etc.
Technical specifications:
- power supply: 9-12VDC.
- consumption: 24mA max.
- LED : 5 mm. (tri-LED, red and green)
- chasing speed : adjustable
- dimensions of PCB : 2.90 x 1.82 in.
How to works:
The circuit diagram shown in figture 2 can be
divided into two parts. The simplest part is used to multivibrator (TR1 and TR2) of frequency generator. TR1 and
TR2 will alternately working one by one. Speed of LEDs
chasing is depending on VR100K, R2, R3, C2 and C3. The
pulsating output at the collector of TR1 is fed to pin14 of
IC1. This output is used to clock a decade counter IC1.
This counter has 10 outputs and therefore counts up from
0-10. Each of these 10 outputs is connected to an LED. R5
and R6 is voltage drop for each LED.
PCB assembly:
Shown in Figture 3 is the assembled PCB. Starting
with the lowest height components first, taking care not
to short any tracks or touch the edge connector with
solder. Some tracks run under components, and care
should be taken not to short out these tracks. All
components with axial leads should be carefully bent to
fit the position on the PCB and then soldered into place.
Make sure that the electrolytic capacitors are inserted
the correct way around. The LED has a flat spot on the
body which lines up with the line on the overlay. Now
check that you really did mount them all the right way
round!
Figure 1. Installing the componants
ELECTROLYTIC
RESISTOR
CAPACITOR
R
TWO WAY CHASING LIGHT
TWO COLOUR 10LED
1
VEL
E
L
CODE 157
D
FUTURE KIT
FUTURE KIT
HIGH QUALITY ELECTRONIC KITS
Testing:
This kit has an operating voltage range of 9-12
VDC. Connect the power supply to the circuit. All LEDs
is chasing to separate two ways and all LEDs is red
colour. After that all LEDs will return to the center and
all LEDs is red colour. Adjust VR100K, all LEDs will be
chasing fast or slow follow the value of VR100K.
NEW KIT SET
CODE
FK
NEW
DESCRIPTION
271 LIGHT ACTIVATE ALARM (COCK
VOICE) WITH SPEAKER
272 SPACE GUN 3 TONE WITH SPEAKER
NOTE:
FUTURE BOX FB04 is suitable for this kit.
http://www.futurekit.com
POWER
3VDC
9VDC