Automatic headlamp is very useful for miners as it eliminate the need to manually switch the headlamp ON and OFF while entering into the mines where light is [[wysiwyg_imageupload::]]not sufficient. The circuit described below works as a human eye to outside light levels and independently turns on and off the lights when needed .It hence offers both safety and convenience. This circuit is very helpful when you are entering into a tunnel at twilight or sunlight even in foggy and rainy condition. For example when you enter into a dark tunnel you will not have to search for headlight switch it will automatically turn on after sensing the poor quality of light and when you come out from tunnel it will turn off automatically.The headlamp circuit is based on NE555, which is widely known to generate accurate timing pulses. Being a multivibrator IC, NE555 works in monostable and astable mode.
During the last two decades, organic light-emitting diodes (OLEDs) have attracted considerable interest owing to their promising applications. They have already made inroads into the displays used for mobiles, PDAs and OLED TVs are also available in the market. Soon, OLEDs will be replacing incandescent and fluorescent lamps. Fig. 1: Image Showing a Regular…
The multi color lighting circuit describe below can be used to decorate your house or your temple with light of different colors and this will not use electricity [[wysiwyg_imageupload::]]but solar energy. We can use solar charger in the range of 9V – 12V. The circuit is built around the CD4060 and few more components. IC CD4060 is 14 stage ripple carry binary counter, divider and an oscillator. Its built in oscillator is main feature of this IC that’s why it can be used in numerous application like flasher, clock generator in timer circuits. Power supply for the circuit is provided with solar charger as shown in circuit diagram. This solar energy is converted into electrical energy and store in the battery connected to it. During day time you can charge the battery through solar charger. You can also 9V battery instead of solar charger.
The dazzling Water Cube swimming arena at last summer’s Beijing Olympics was lit up by around half a million LEDs. Famous Bridges, buildings and hotels are opting LEDs for their exquisite night lighting and general illumination too. Why there is this sudden rage for the tiny LED? A little light emitter, a well renowned indicator that faithfully served in the display units of calculators, digital watches, and mobile phones for years is now geared up to take away the headache of efficient as well as Eco-friendly lighting.Yes, the tiny LED is all set to light our lives. It has taken a giant leap, from being a humble indicator to on the way to monopolize the lighting market. Years of research has brought LEDs to this advanced stage.
LED bulbs are the future of lighting. Be it automobiles, industries, household or any hobbyist requirement, LEDs form the best solutions in terms of long-term cost savings and power efficiency. Not only are these devices more efficient than traditional lighting devices, they are built to outlast any of their lighting predecessor. The internals of a typical LED bulb will be explored here.Externally, a LED bulb might look similar to a conventional incandescent lamp, but the two are quite different. The chassis of the bulb is made of ceramic and houses the electronic ballast. Ceramic is used for its insulating and heat dissipative properties.
Automatic night light control system needs no manual operation for switching ON and OFF when there is need of light. It detects itself whether there is need for light or not. When darkness rises to a certain value then automatically light is switched ON and when there is other source of light i.e. day time, the light gets OFF. In the project we use light detecting resistor as a light sensor & a NAND gate for detection of high level or low level of voltage to energize the RELAY coil which is used to interface the control circuit with the external light source.