The Top Ten Technologies: #6 Fuel Cell Vehicles The personal automobile is the source of both fantastic benefits to modern life and terrible consequences. Those consequences range from devastating public health effects due to automobile emissions (asthma, lung cancer, throat infections, etc.) to the rapid alteration of our planet's own atmosphere (global warming). But what if a new technology could bring us all the benefits of personal transportation without these drawbacks? Source: EFY Network
Breakthrough in "cool" fuel cells promises revolution in high density power production Imagine powering your notebook computer from a micro fuel cell the size of a cube of sugar. Consider the possibility of powering your entire home with a power plant the size of two soda cans. This is the potential of a breakthrough in fuel cells called "thin-film solid oxide fuel cells," or SOFCs. These thin-film solid oxide fuel cells are currently being developed at the University of Houston. They demonstrate remarkable properties for generating electricity without the high temperatures required by today's fuel cells, and without the need for taking up the space that's currently required by commercial fuel cells. Source: EFY Network
Making of UPS power supply Welcome to this website which brings simple circuit diagram of UPS power supply. Making the circuit for UPS (uninterrupted power supply) is really not a difficult task. This website brings simple form of commercial UPS which can easily provide electric power of 12V. You will be amazed to know that this circuit can be adapted for other regulated and unregulated voltages by using different regulators and batteries. Source: EFY Network
Your own 40W fluorescent lamp inverter Are you wholeheartily interested in making very reliable 40W fluorescent lamp inverter? If your answer is yes, you are at right place. For running 40W fluorescent tube, this 40W fluorescent lamp inverter is specially designed providing current of 3A. This is basically a larger version of the 12V DC fluorescent lamp driver and can be used to light regular or blacklight tubes.
Source: EFY Network
Make your own battery charger Welcome to this website which brings simple circuit diagram of Rx/Tx battery charger with peak detect. It is specially programmed for a C/2 charge rate for 250mAh and 500mAh batteries. Now you don't have to worry for your final year project. By following some simple steps, you can make your own reliable battery charger.
Source: EFY Network
USB battery charger circuit Due to its increased speed as well as flexibility, USB (universal serial bus) is considered as a trustworthy communications interface. And for faultless working, USB has four terminals. As many of the gadgets run on rechargeable battery, it is now the trend to design the charging circuit that uses the power supply from the USB port to charge the rechargeable battery.
Source: EFY Network
Your own automatic emergency light Power cut is one of the main problems for developing as well as developed countries. But here is one solution for the power cut. This web page consists the simple circuit diagram of LED based automatic emergency light. Due to the presence of white LED, this automatic emergency light produces high brightness. This circuit has one more advantage. When the battery is fully charged then the charging process automatically stops. Here is the simple circuit diagram.
Source: EFY Network
Beginners-based uninterrupted power supply (UPS) Power cut is one of the basic problems for most of developing as well as developed countries. UPS can be the better solution for solving power problems. Here is the simple circuit diagram of uninterrupted power supply for providing power supply of 5V. When the AC power is cut this simple circuit automatically starts providing 5V power. Reliability and longevity are some of the salient features of this simple project. Source: EFY Network
6V to 12V Converter for engineering students Here is the simple circuit diagram of 6V to 12V converter. This inverter circuit provides up to 800mA of the 12V power from 6V supply. You will be amazed to know that by changing just a few components, you can also modify it for different voltages. Reliability and longevity are some of the outstanding characteristics of this electronic circuit.
Source: EFY Network
Making of night light saver V5.0 Saving energy shows that you are very conscious regarding this important topic of life. Today we have several methods for saving the precious energy. Here is one more method for saving energy. This is simple circuit diagram of night lamp which can save nearly 5V of energy. Easy to install and nearly no maintenance are some of the salient features of this simple circuit. Source: EFY Network
Battery low voltage beeper for beginners Here is the simple circuit diagram of battery low voltage beeper. This electronic circuit provides an audible low voltage for 12V battery. The LED in the circuit emits light when the voltage of the battery is less than 11V. Additionally, the speaker also emits periodic beeping sound. This circuit is widely used in automobiles and other 12V applications.
Source: EFY Network
Low voltage alarm for engineering students Here you can learn the complete construction of low voltage alarm circuit. For monitoring batteries as well as other volatile sources of current, this simple circuit is specially designed. This electronic circuit produces sound and light an LED when records a low voltage in the circuit.
Source: EFY Network
Battery Tester Project For Beginners The main objective of this project is to design and build a battery tester that is able to test various types of dry cell and rechargeable battery with a voltage of less than 2V. You can also this circuit for your domestic use. The current driving the LEDs is regulated by using the external resistor R1 and hence limiting resistors are not required. Source: EFY Network
1KHz Sine wave Generator Now you don't have to worry for your final year project. Here you can see the simple circuit diagram of 1KHz Sine wave generator. By adopting state-of-the-art technology based wien bridge configuration (C1-R3 & C2-R4), this reliable circuit generates an excellent quality of 1KHz sinewave. Some other salient features of this circuits are as follows: low distortion, variable output, low output impedance etc.
Source: EFY Network
Your own 1.3 Volt power source The transferring of high voltage across your electronic instrument may get harm the internal structure of the instrument. This is a simple circuit diagram of 1.3 V power source for your front panel multi adapter having digital thermometer. This simple circuit works faultless and takes its power from PC. For better understanding, the power connectors have different color coding including red color, black color and yellow color. Source: EFY Network
The Top Ten Technologies: #5 High-Density Portable Power It seems that no matter how advanced notebook computers get, their battery life remains at a standstill: 2-3 hours from most models, regardless of price. From electric vehicles to portable electronics, today's battery capacity lags far behind the steady improvements in other areas of technology. Despite the hype and advertising from battery manufacturers, today's chemical batteries are virtually identical to ones sold three decades ago. Source: EFY Network
