With the aggravation and improvement of human environmental consciousness day by day of the energy crisis, the development and utilization of new energy is paid attention to more and more by people. And the solar energy has been favored by people recently as the inexhaustible high-efficient and pollution-free energy. The photovoltaic sine inverse
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power supply system that this text introduces is exactly a for suitable for the familying, a kind of power system especially suitable for the few electric western users of outlying district of electroless, its market prospect will be broader and broader with the proceeding of development of western regions of China. The basic structured flowchart of system is shown as in Fig. 1. Pursued knowingly, the solar cell array passes the charging circuit to the accumulator charge at first, thus get a basic stable direct-current volts, and then invert the direct current the high-frequency alternating current through the inverter circuit, filtered by voltage transformer boost and smoothing circuit of mains frequency finally and turned into the alternating current voltage of 50Hz, 220V sine. The control of the overall system was finished by MR16 one-chip computer. Its key part samples and forms and feedbacks the constituent digital PI controller part for the forming of SPWM wave and alternating current voltage of the foundation output. 68HC908MR16 one-chip computer is a low-cost, high-performance eight-bit one-chip computer. It have the intersection of 32k and byte can wipe flash memory FLASH, RAM with 768 bytes on-chip that write, totally enough to this system; PWMMC module that a special PWM of No. 6 used for electric machine control exported, are suitable for single-phase, three phases to reverse, this module has special No. FAULT...
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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