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This is a 5V to 12V DC-DC step-up (boost) converter circuitry that is especially ideal for the USB powered applications. First of all a USB port has two current supply modes. Before detecting the connected device, it supplies maximum 100mA to the load. After recognizing the device, it increases the output current up to 500mA. In this circuit, controller (LT1618) also provides two input current modes. 100mA and 500mA input modes can be selected by the user. Output currents are limited due to the increased potential difference at the output. When the demand of the load increases, output voltage will start to decrease. For example, if the circuit operates in the 100 mA input mode, when the load is 35 mA, the output voltage will be kept at 12V. But if the load increases to 50 mA,output voltage will reduce to 8V to maintain the constant 100 mA input current.

This a simple and very easy bulid Electronic Circuit Project of 8A regulator using By LMZ13608 Circuit. High efficiency switching power supply electronic circuit project can be designed using the LMZ13608 8A regulator . This 8A regulator electronic circuit project based on the LMZ13608 has an very high efficiency and require few external electronic parts . This power supply electronic project supports a wide input voltage range between 6 to 36 volts and will provide an fixed output voltage from 0.8 volt up to 6 volt. 8A Regulator Circuit Diagram: Some features of this power supply regulator are : fixed switching frequency (350 kHz), flexible startup sequencing using external soft-start, protection against inrush currents and faults such as input UVLO and output short circuit ,– 40°C to 125°C junction temperature range ,single exposed pad and standard pinout for easy mounting and manufacturing.

Around us will be a large amount of energy scattered in space, are the RF waves emitted by TV channels, radios, cell phones, computers, etc.. What most people do not know is that we can capture the scattered energy and transform into electricity. To capture any wave, we have to have a coil in the same resonant frequency, we can also simply capture radio signals by a common antenna and light an LED if we get a strong signal.Setup is simple. You will need an antenna too high, most likely on roof or on top of a mast and make sure that isolated and fixed. Then connect the enameled copper wire antenna and take it to the circuit. Power of the environment by using an antenna Circuit

In a press release today, Nintendo announced that starting Sept. 20, the Wii U Deluxe set would sell for $299.99, down from $349.99 at launch. Also on Sept. 20, Nintendo will release a Legend of Zelda: Wind Waker bundle – complete with the game, a bunch of limited-edition artwork, and a "GamePad with Zelda-inspired gold accents" – for $299.99.  So what's behind the announcement? Well, for one thing, the Wii U has been selling rather dismally. According to Reuters, Nintendo has unloaded 3.6 million Wii U units since launch, which sounds like a big number until you consider that the Wii U launched all the way back in November of 2012. Globally, in the months spanning April 1 and June 30, the Wii U sold a measly 160,000 units. (That figure is "really, really bad" Kotaku has noted.)  But there's also the small matter of the impending launch of the Microsoft Xbox One and Sony PlayStation 4. Microsoft is said to be eyeing a Nov. 8 release date for its device; So...

While detecting discontinuities on a circuit board, it is probable to include resistors, semiconductors or other elements in measurements. This situation may cause wrong results. On the other hand sometimes the voltage or current of the multimeter may defect some circuit components. Our circuit overcomes this inconvenient conditions. The circuit determines greater than 1 ohm values as discontinuity. Measure voltage is not more than 2mV. So no kind of diode, IC or other component is bypassed. Maximum current output of the circuit is about 200uA. Simple Wire Continuity Tester by LM709  Indicator of the circuit is a LED. Voltage supply may be two 9 Volt batteries. Voltage adjustment of the amplifier is done by P1 potentiometer. To do this process, first short circuit the probes and then turn P1 until LED brights. When you separate the probes again LED will fade out. This is a cheap and very useful circuit. You can build it on a PCB to use more easily.