The generation of electric potential by the application of pressure, strain or any force is known as the piezoelectric effect. This effect can also be implemented to sense any audio signal. This can be achieved by using a piezoelectric diaphragm as audio sensor as shown in this project. Apart from the piezo sensor, other parts used in the circuit are as follows:1.Transistor BC5482. Resistances3. Speaker, and4. Capacitances
The generation of pressure variation or strain by the application of electric potential across a piezoelectric material is reverse of the piezoelectric [[wysiwyg_imageupload::]]effect. The circuit based project mentioned here uses this principle to use a piezo diaphragm as an output device. This is the concept used in commonly used piezo buzzers. As buzzers, they are also used in horns, telephone keypads, calculators etc. Shown below is an image of external features of a piezo buzzer. Read more to find out how piezo buzzer can be constructed and how it can be put to work with easy steps.
This small alarm circuit protects your valuables from thefts by engaging the alarm when somebody attempts to pick up your suitcase.It can be operated with the [[wysiwyg_imageupload::]]help of 3V therefore power consumption is also very less.It uses very less components that why it can be easily fit on the suitcase. Due to its small size you can easily carry this small alarm while you are travelling.The circuit is build around IC LM358 which is a low power transducer amplifier. The important component of this circuit is piezo sensor. Piezo sensor converts vibration or pressure into electrical signal. This same piezo element can be found inside the buzzer or you can purchase the same from market. Its working is somewhat similar to capacitors. Piezo element holds the charge when potential applied, until it is mechanically disturbed or some vibration will be there.
Even though several breakthroughs in Chemistry were achieved by them, the Curie’s are known to majority of the world for their revolutionary work on radioactivity. However, it is amazing to know that one of their discoveries has given one of the most common accessories any kitchen has. Not related to radioactivity, this is the Gas Lighter. Based on the principle of piezoelectricity, which is one of the discoveries made by Jacques Curie and Pierre Curie. Piezoelectric lighters are an economic solution to light gas stoves. Ever wondered how does a small force of thumb produces a spark of the order of kilo volts (kV)? Let’s have a look on the insides and working of the lighter in this device dissection article.
Piezo buzzer is an electronic device commonly used to produce sound. Light weight, simple construction and low price make it usable in various applications like car/truck reversing indicator, computers, call bells etc. Piezo buzzer is based on the inverse principle of piezo electricity discovered in 1880 by Jacques and Pierre Curie. It is the phenomena of generating electricity when mechanical pressure is applied to certain materials and the vice versa is also true. Such materials are called piezo electric materials. Piezo electric materials are either naturally available or manmade. Piezoceramic is class of manmade material, which poses piezo electric effect and is widely used to make disc, the heart of piezo buzzer. When subjected to an alternating electric field they stretch or compress, in accordance with the frequency of the signal thereby producing sound.