With the high-speed development of social economy, the human demand for electric energy is larger and larger. Under non-renewable, situations in short day by day of energy such as the fossil energy, etc. , the increasingly many country realizes the power saving and develops the importance of the regenerated energy. So in recent years, new and high t
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echnology such as high voltage direct current transmission, solar electrical energy generation get the fast development. And high-new technical development these leave controlled device of high-power that the characteristic promote day by day, such as IGBT. These large power devices are often taller than the large, integrated level in power and costing an arm and a leg, and need suitable his work`s driving circuit. Because big power device these make up, form bridge circuit, work only more often at work, each power device is independent, so its required voltage of driving circuit must be offered by multi-channel isolated direct-current volts, and such multi-channel isolated direct-current volts is exported and generally realized by the switching power supply. The switching power supply is generally supplied power for it by city power, so long as city power is normal, the switching power supply can work, and can export stable and multi-channelly and isolate the direct-current volts. Once city power breaks down, the output voltage of switching power supply will drop, and because the direct-flow mother who connects the HPSD is connecting the electrolytic capacitor greater in capacity in parallel on the line, the output voltage of the switching power supply must lead to the fact the voltage of the driving circuit drops while dropping, therefore will probably cause the power device to shut off and burn immediately at the moment...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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