Siren system circuit
Posted on Sep 22, 2012
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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..... -
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to....
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A LED is defined as "light-emitting diode: diode such that light emitted at a p-n junction is...
The supply voltage is 5V and I am seeking to increase it to 12V with a load current of 1A, or an...
Circuit Hello HELLO! Are you deaf Do you have disco ears ` If people ask you this and you`re...
Marx Generators are often used in pulsed power and high voltage applications to generate a high...
Simple and easy to do single flashlight battery DC-DC driver circuit and leave the battery...
Shows - typical of six dynamic display circuit. In the figure, the PA 8255 end date display...
Adjustable dual voltage power supply lines shown, can be used as a power supply line frequently...
CS3843 and CS5101 constituted by the output of 5V/3.3V switching DC power supply circuit as...
Circuit MVBR traditional two-transistor and other components to provide a simple phase locked...
Explanation Here is a simple fire alarm circuit based on an LDR fire detection sensor. Smoke...
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