All posts on January, 2008
Posted on 31 Jan 2008
This a wide rang input DC-DC converter that is designed to accept a range of input voltages that are present in a car’s electrical system which not alway equal 13.8V, and provide a regulated 12v output. Nominally, the battery voltage is about 13.8v, but when the engine is being started, the voltage can often droop down to 6 or 7 volts for a short time, and peaks can be present somewhat above the nominal voltage as well. Because the input voltage can be either above or below the desired output of 12v, the converter needed to be a buck-boost configuration.[more]
Posted on 31 Jan 2008
A dc-dc regulator/converter or another name known as buck regulator, provides stable regulated output voltage to supply electronic circuits. LM2576 circuits perform same function as the commonly known voltage regulator LM7805 from National Semiconductor. The 7805 voltage regulator dissipates a lot heat. The higher input voltage, the more heat is generated. The extra input energy is converted to heat, keeping the output voltage regulated at 5V.[more]
Posted on 31 Jan 2008
If you are interesting Arduino projects.this is one that cool design.Funax is MAKE Flickr Pool member he made an Arduino-compatible board powered by a single AAA battery. In the circuit he used step-up converter circuit to boost the battery’s 1.5V output to 5V and meet Arduino’s minimum power requirements. Keep in mind - this circuit would considerably reduce current supplied to the board and therefore limit its ability to power external components.[more]
Posted on 31 Jan 2008
If you have some old junk electronic parts and extra circuit boards laying around, don’t leave it around the your room,make a cool gift like resistor man, he makes a cool piece of art from junk electronic parts such resistor and LED.[more]
Posted on 31 Jan 2008
This is a wide band amplifier cicuit which is suitable for the frequencies between 10MHz and 500MHz.Wide band amplifiers are used in communication receivers, RF measuring equipment and tons of other devices. The circuit described here uses a state of the art transistor to get maximum performance at high frequencies. It can be used as a low noise pre-amplifier due to his low noise characteristics. [more]
