Bright LED flashlight homemade

High-brightness LEDs have made great progress with the breakthrough of gan technology. High-brightness visible light LED has been widely used in various fields of life, such as: display, traffic signs, automotive electronics, backlights, architectural lighting, architectural decoration and so on. With the application of the market, high-brightness LEDs have achieved unprecedented development.

The main markets for high-brightness LEDs include monochrome display subtitles for road conditions and highway information; full-color billboards for large display screens; LEDs for interior and exterior lighting; backlights for portable products; architectural and special lighting Lighting applications; and applications in the electronics sector, as industrial indicators and customer-required indicators (such as the blue light LEDs used by Sony's playstaTIon 2). Looking forward to the development of high-brightness LEDs in various future applications, the backlight, automotive, and lighting markets for portable products will become the driving force for their growth.

1) Long life, reliable and durable, extremely low maintenance cost. LED can be used continuously for 105h, 100 times longer than ordinary incandescent bulbs;

2) High efficiency can now reach 201m/w. It is estimated that by 2005, it will reach 501m/w], and the spectrum of led) is almost exclusively concentrated in the visible light band, and its luminous efficiency can reach 80% to 90%, and LED is more energy-saving than energy-saving lamps;

3) The color is bright, the light color is purely a 12-inch red traffic light. It uses a low-efficiency 140w incandescent lamp as the light source. After the 2000lm white light is generated by the red filter, the light loss is 90%. The red light of 2001m, and the lamp designed by lumileds lighTIng with 18 red led light sources, including circuit loss, only consumes 14w, can produce the same light effect;

4) Fast lighting speed The car signal light is an important field of LED light source application. Because the LED response speed is fast (ns level), installing a high-level LED brake light on the car can reduce the occurrence of car rear-end accidents.

In recent years, the high-bright led has been applied in the low beam of the car, such as the Audi a86.o of the Audi company in Germany, the concept car yak launched by the Italian fioravanTI company at the 2003 Geneva Motor Show, and the Ford Company of the United States recently at the Detroit Auto Show. The model u launched on the beginning of the use of high-bright led in the design of the headlights.

1) Low power on the market, the single led power is generally below 5w, and there is no LED with higher power. This is the biggest bottleneck for LEDs to become the first choice for lighting.

2) Strict control of temperature is required. LED is a semiconductor material. It has the same pn junction as ordinary diodes. Since the power of high-brightness diodes is relatively large, it is the same as power semiconductor devices. The heat dissipation problem needs to be considered. The junction temperature is too high and will directly affect. Led life, and will increase the light decay of led, the situation will seriously burn led;

3) In addition to low price, the price is difficult to become the main factor of lighting. Although LED has been recognized by most people, it is also favored by most people, but its high price is difficult to be accepted by consumers. About o. 6 yuan / month, green and blue single led at 1.8 yuan / month, the price of white led reached 2.2 ~ 5.5 yuan / month; if you combine dozens of single led, its cost will be greatly increased If a LED is installed in a lawn lamp, its unit price is equivalent to several times that of a general lawn lamp. If LED is to become the mainstream light source for future lighting, it must be developed in the direction of big lumens, and the cost can be reduced. It is possible to break through.

Flashlights, such household appliances, are not unfamiliar to everyone, but in the face of the same product in the market, a single product, do you think it is necessary to do something? Yes, let's take a look at this flashlight "small straight", definitely "only this one"! As a DIY party, you know ~ 1 homemade flashlight tools and materials ● electric iron

Flashlights, such household appliances, are not unfamiliar to everyone, but in the face of the same product in the market, a single product, do you think it is necessary to do something? Yes, let's take a look at this flashlight "small straight", definitely "only this one"! As a DIY party, you know~

1 homemade flashlight tools and materials

● Electric iron

● Hand grinding

● Utility knife

â—‹ 350 ohm resistor 1

â—‹ 1 IN4007 LED

â—‹ Silicone rubber and thermal curing adhesive

â—‹ AB glue

â—‹ 1WLED1

â—‹ 15 degree condenser lens 1

â—‹ 18650 lithium battery (to be charged with protection board) 1

â—‹ AMC7135 steady current chip 1

â—‹ One stainless steel tube with an inner diameter of 21mm

â—‹ 1 switch

â—‹ Heat shrinkable tube

â—‹ wire

2 Working principle

● Circuits provided by manufacturers of 7135IC

● Circuit diagram

3 welding current regulator chip and LED

● Place the 7135IC on the PCB side of the LED, clip it with the book clip and solder

● Good welding

4 wiring

● According to the description of the circuit diagram, the red line is connected to the LED positive pole, and the black line is connected to the GND pin of the 7135IC.

5 processing condenser lens

● Install the LED

● Apply silicone rubber to improve waterproof and dustproof performance

● Install the lens lighting test, yes, bright

● Mount the lens into a stainless steel tube

● Pull the wire from the tail and pour the heat-cured silicone to transfer the heat of the LED to the stainless steel tube. 6 Install the battery.

● Install the battery and take out two wires at the negative pole of the battery

● Invert the silicone rubber to fill the space between the battery and the stainless steel tube

● Connect the 2 negative wires to the negative pole of the charging socket

● The positive pole of the charging socket is soldered to the diode, and then the thermal shrink tube is insulated. The positive line of the battery is connected to the output of the diode, and the other line is connected to the positive line of the charging socket.

● Connect a 350 ohm resistor to the positive output wire of the charging socket, put on the heat shrinkable tube, and stick the LED with the glue in the indicator light hole of the switch (the switch has the indicator light inside, and the original indicator light of the switch is removed. Drop it, just put it on. You can see the brightness of this LED through the translucent red shell of the switch when charging)

This switch has its own indicator light. Its function is to turn on the switch. This light will be on, but we don't need it as a flashlight, so we will connect the charging indicator on the other circuit to the position where the original switch is lit. Got it.

● 1Wled's positive line is connected to the switch's free end, and the other end is connected to the battery's positive line.

● Connect the other end of the resistor to the positive pole of the LED indicator and cover the heat-shrink tubing. Now all the wires are connected. Fix the charging hole before the charging socket is extended with AB glue. Finally, apply AB glue to the switch and press the stainless steel tube to wait for the glue to solidify.

7 test

● Charging

● Switch when charging

● The spot of 2 meters away. More round, huh, huh~ you're done!

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