2007 Electronic Project Kit2007 Electronic Project Kit

Remote Control NightlightRemote Control Nightlight

Biological &AgriculturalEngineering

ObjectivesObjectives Learn to read and follow an electric schematicLearn to read and follow an electric schematic Identify electronic circuit componentsIdentify electronic circuit components Function of circuit componentsFunction of circuit components How to solder correctlyHow to solder correctly Promote Science and TechnologyPromote Science and Technology

Safety First: How to use a soldering ironSafety First: How to use a soldering iron

Soldering joins metals to make an electrical and Soldering joins metals to make an electrical and mechanical connection mechanical connection

Solder is an alloy of metals which can include tin, Solder is an alloy of metals which can include tin, copper, silver, and leadcopper, silver, and lead

Soldering irons are used to melt solder and can reach Soldering irons are used to melt solder and can reach temperatures of 600-700 degrees Fahrenheittemperatures of 600-700 degrees Fahrenheit

Example of Correct Solder Joints

Assembling the remote control Assembling the remote control nightlightnightlight

General InstructionsGeneral Instructions Refer to Figure 1 for parts layout and parts listRefer to Figure 1 for parts layout and parts list Refer to Assembly Instructions steps 1-7Refer to Assembly Instructions steps 1-7 Suggested assembly order;Suggested assembly order;

Install resistors first (especially if new to soldering)Install resistors first (especially if new to soldering) Install diode (band up)Install diode (band up) Install capacitor and LEDs (polarity sensitive) Install capacitor and LEDs (polarity sensitive) Install transistors (note orientation)Install transistors (note orientation) Install IR Module (solder pins and large flat tabs)Install IR Module (solder pins and large flat tabs) Install 9V battery snapInstall 9V battery snap Any TV/VCR remote will provide the IR signal to Any TV/VCR remote will provide the IR signal to

turn the LEDs onturn the LEDs on

Top Edge

Front (Component side) Back (Soldering side)

Correct Board Orientation

ResistorsResistors

Resistors are electrical Resistors are electrical components that impede the components that impede the flow of electrons. The unit of flow of electrons. The unit of measure of resistance is the measure of resistance is the Ohm (Ohm (ΩΩ))..

Also refer to the color code in Also refer to the color code in the instructions (the instructions (Figure 6Figure 6))..

DiodeDiode

A diode is usually made from two semiconductor materials. It causes electrons to flow in only one direction.

CapacitorCapacitor

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 (-).

TransistorsTransistors

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)Light emitting diodes (LED’s)

LED’s are semiconductors that emit light in response to a small voltage without heat being produced.

Short Leg (-)

Flat Side (Notch)

Polarity sensitive;+ Anode- Cathode (short leg)

Also refer to Figure 4 in the instructions for more information. (+) (-)

LED’s – cont.LED’s – cont.

Additional ResourcesAdditional Resources

4-H Electric Curriculum Project Guide,4-H Electric Curriculum Project Guide,

““Entering Electronics”Entering Electronics”

““Soldering and Troubleshooting TipsSoldering and Troubleshooting Tips” on ” on Electric Program web pageElectric Program web page

Visit the Visit the Electric ProgramElectric Program web site at; web site at;http://www.bae.ncsu.edu/programs/extension/4-h/index.html