Difficult to observe in order to solve the leaning phase in adjusting the electric transmission line manually, record and difficult and normalizing three major difficult problems this difficultly. This design passes the design of the software and hardware, have realized it for longer time, do not have it to the electric current in the electric tra
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nsmission line disconnectedly, voltage, zero sequence current, power factor, active power, reactive power, apparent power, group involve the monitoring, record of the harmonic electric energy and store. This design adopts MSP430F135 one-chip computer in order to control the core, combine voltage, current transformer, DSP electric energy chip, human-machine interface, acoustooptic alarm circuit and signal processing circuit, etc. and realize the supervision on electric transmission line parameter, system this can data that gather for a long time carry on curve analyze in upper computer in the plate with leave U in, offer science, reliable basis for adjusting circuit load in the utility. This design chooses DSP electric energy chip, chip this have seven No. second order 16 sigma-delta ADC, basic reference voltage output, the voltage, electric current are sampled, fundamental wave, harmonic wave and metric signal processing circuit of energy frequency, have SPI communication interface at the same time, and support gain to noise temperature ratio of the whole digital domain, phase correction. Can automatic computation active power, reactive power, look at year power and power factor. Inside has voltage that monitors the circuit, work and go on normally when can guarantee power up and power down. This design can carry on high-accuracy measuring, input the dynamic operating range 1000: 1, Guarantee the non-linear error in...
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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