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Electronic Circuits

Learn basic electronic concepts with hundreds of simple DIY electronic projects. Each project is covered with tested circuit / schematics, detailed explanation of circuit functioning and demonstration videos. Explore the below collection of mini circuits and projects and get off to a good start as an Electronics hobbyist.
Latest Electronic Projects
This circuit based project demonstrates the working of 555  timer in astable mode to generate pulses of time period 0.5 second. This pulse can be further used [[wysiwyg_imageupload::]]for anything where we need a pulse such as to blink a LED or to create fashionable blinking lights. This circuit of this project makes the use of timer IC NE555 which produces a constant square pulse of a desired frequency. This pulse could be either triggered or could be produced continuously depending upon the mode of 555 we are using. The two mostly used modes of 555 are Monostable and Astable. Here it is used in the astable mode with time period of half second, with high time period of 0.333 seconds and low time period of 0.166 seconds. Keep on  reading to find out how the circuit is constructed and in what mode does the 555 IC works.


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 BC548

2. Resistances

3. Speaker, and

4. 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.