The optically-controlled circuit has essential function in urban street lamps or corridors are lighted, adopt the optically-controlled circuit, can open and shut off the lighting lamp automatically according to power of the light, make sure nobody automaticallies control, can lighten workers` labor intensity, valid power saving. But optically-cont
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rolled circuit have defect their, night there is no light, the lighting lamp will be working, in this way, will cause the waste of resources, will shorten the life-span of the lighting lamp too. Add one the intersection of sound control and circuit on the basis of optically-controlled circuit at this moment, make lighting circuit when there is no lighting, only controlled by sound, when there are sound of one`s walking or other high sound, automatic working of the lighting circuit. When the sound disappears, the lighting lamp goes out automatically, this needs to add a time delay circuit on condition that the optically-controlled circuit unite the job with the circuit of sound control, after making the lighting lamp light, went out automatically after certain time of delaying time. This text designed the acousto-optic controlled lighting lamp, when this circuit has acoustical signal at night, lighting lamp Use LED luminotron simulation Light; Delay 5 seconds when being silent, go out; If the sound interval is smaller than 5 seconds, then LED lights continuously. The voiced-unvoiced is not lighted in the daytime. The small and exquisite esthetic and practical energy-conservation of this fund, can be installed to fix to can nail with the mosquito on the own gate on corridor, can also be used in the factory building, the construction site. Using this kind of lighting circuit, people needn`t try to find out the switch in the...
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....
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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....
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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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