Download 4-H Electric Project Remote Control Nightlight

2007 Electronic Project Kit
Remote Control Nightlight
Biological &
Agricultural
Engineering
Objectives
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Learn to read and follow an electric schematic
Identify electronic circuit components
Function of circuit components
How to solder correctly
Promote Science and Technology
Safety First: How to use a soldering iron
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Soldering joins metals to make an electrical and
mechanical connection
Solder is an alloy of metals which can include tin,
copper, silver, and lead
Soldering irons are used to melt solder and can reach
temperatures of 600-700 degrees Fahrenheit
Example of Correct Solder Joints
Assembling the remote control
nightlight
General Instructions
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Refer to Figure 1 for parts layout and parts list
Refer to Assembly Instructions steps 1-7
Suggested assembly order;
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Install resistors first (especially if new to soldering)
Install diode (band up)
Install capacitor and LEDs (polarity sensitive)
Install transistors (note orientation)
Install IR Module (solder pins and large flat tabs)
Install 9V battery snap
Any TV/VCR remote will provide the IR signal to
turn the LEDs on
Correct Board Orientation
Top Edge
Front (Component side)
Back (Soldering side)
Resistors
Resistors are electrical
components that impede the
flow of electrons. The unit of
measure of resistance is the
Ohm (Ω).
Also refer to the color code in
the instructions (Figure 6).
Diode
A diode is usually made from
two semiconductor materials.
It causes electrons to flow in
only one direction.
Capacitor
A capacitor is a combination
of conducting and insulating
layers that has the capacity to
receive, hold, and release
electrons.
Note that Capacitors are
polarity sensitive, positive (+)
and negative lead (-).
Transistors
Transistors are transient resistors—they are
made from semiconductor materials that
enable a small current to control a larger
current
Light emitting diodes (LED’s)
LED’s are semiconductors
that emit light in response
to a small voltage without
heat being produced.
LED’s – cont.
Polarity sensitive;
+ Anode
- Cathode (short leg)
Also refer to Figure 4
in the instructions for
more information.
Flat Side
(Notch)
Short Leg (-)
(+)
(-)
Additional Resources
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4-H Electric Curriculum Project Guide,
“Entering Electronics”
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“Soldering and Troubleshooting Tips” on
Electric Program web page
Visit the Electric Program web site at;
http://www.bae.ncsu.edu/programs/extension/4-h/index.html