Semiconductor energy-saving lamp"
A, teaching resources to prepare
1, supporting materials (disassembled): 1. battery box
2. control circuit board
3. switch
4. LED board (including three white LED)
5. p>5. Desk lamp bracket
2, self-provided materials lamp base, lampshade material requirements:
Lamp base selection requirements can be mounted into the battery box, mounted switch, can be mounted on the desk lamp bracket. Lampshade should be selected according to the set form of light irradiation materials. Requirements for beautiful design, structural stability, safety and reliability, as much as possible, the use of renewable resources. In addition, on the basis of the stability of the imagination and creativity, in the appearance of personalized style. Suggestions: Some bad mouse, soap box, packaging box can be used as lamp base; plastic bowl, candy bottles, cardboard, mineral water bottles can be used as the top of the lampshade. Sometimes the old lamp can be converted (see the following two pictures were I used lamp base and lampshade part of the material).
3, tool preparation
Commonly used tools: may be used in the processing equipment has a drill press, vise, screwdriver, sharp-nosed pliers, scissors, in addition to a small number of soldering irons, hot melt gun, adhesive materials, solder, multi-purpose meter and other auxiliary tools and instruments.
Two, wiring and assembly
1, circuit connection diagram
Control board physical diagram
2, physical connection diagram
Precautions: in the power supply is prohibited to short-circuit the output, otherwise the control board integrated circuit will be burned.
Three, energy-saving effect, safe life and other comparative tests (table for reference only)
1, energy-saving effect of comparative test method: the different voltage value of the battery as a power source, respectively, with the controller and not connected to the controller of the table lamp power supply, observation of the brightness of the table lamp and the results will be filled in the following table blanks.
Power supply
3 volts
2 volts
1.5 volts
1 volt
Brightness
Connected to the board
Light
Light
Not connected to the board
Bright
Bright
Not bright
2, energy consumption, safety, life and other comparisons (can be tested by the test). Comparison of life (can be obtained by testing or consulting information, such as: the same energy with the battery on the ordinary tungsten bulb and light-emitting diode LED power supply, so that the luminous intensity of the same, observation records)
Life
Energy
Safety
Incandescent
LED bulbs
10 years
Without control board
Better
Not bright
Bright
Less
Safety (3 to 5 volts power supply)
3, a variety of luminous body physical display, experience the development of the history of luminous body.
Four, innovative design space
First from the appearance of innovation, due to the lampshade, lamp base in certain constraints selected by the students themselves, leaving students with a huge design space; then change the number of luminous body LEDs can be innovative, such as according to the need to choose one or more LEDs as a luminous body, etc.; and again to change the electronic control mode better reflect the innovative design, such as the use of infrared power supply, to experience the history of luminous body development. Design, such as infrared remote control instead of ordinary switches, light control instead of universal energy switch. Of course, if you change the desk lamp for wall lamps, flashlights, computer lights, advertising lights ......
Five, part of the semiconductor energy-saving lamps and lanterns show
(desk lamps and torches)