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When a few of electronic components are assembled together by following a simple schematic diagram, it constitutes an mini electronic circuit project.
Today the world around us is heavily knitted with all sorts of electronic systems, gadgets and devices, and all these systems are fundamentally built under a certain project name. This has inspired many youths and students to pursue electronics by building their own hobby projects in their leisure time. Consequently interest simply keeps growing and we see these budding hobbyists ultimately growing into full fledged engineers.
The following page shows a comprehensive list of diverse electronic projects and circuits which are simple to build using minimum electronic components such transistors, resistors, capacitors and some easily available ICs like IC 555, IC 741, IC LM324 etc. These mini projects are specially designed keeping the new hobbyists in view and so ensure that the circuits can be built by all newcomers and newbies in the field of electronics, either for for fun and for learning the concepts.
The first article below discusses a Full bridge or H bridge based Bidirectional motor controller circuit using the 4 opamps from the IC LM324. In the second artilce we learn about a high torque bidirectional motor controller circuit using IC 556 Introduction Generally, mechanical switches are accustomed to adjust the direction of rotation of a … Read more2 Simple Bidirectional Motor Controller Circuits Explored
The simple alcohol detector circuit discussed here will accurately sense the emanation of alcohol gas from a selected source, such as from the mouth of a drunkard, when used as a breathalyzer. It’s cheap and a useful device which can be used by all authorized personnel such as a cops or traffic police for nabbing drunken … Read moreAlcohol Detector Meter Circuit using MQ-3 Sensor Module
This simple circuit will create dazzling LED light effect by detecting any music frequency in the atmosphere and by illuminating a 10 LED bar graph meter, indicating the level of music. The proposed circuit is suitable for applications where music and entertainment are involved, such as in parties, festivals, get to togethers etc. Since the … Read moreWireless Music Level Indicator Circuit
This circuit is designed to sense the whistles from a pressure cooker and count the number over a digital display. The system relieves the user from the stress of constantly monitoring the cooker and from manually counting the whistles. The idea was requested by Mr. P.K. Bajpai Design Concept In many of the Asian countries … Read morePressure Cooker Whistle Counter Circuit
3 easy to build speed controller circuits for DC motors are presented here, one using Mosfet IRF540, second using IC 555 and the third concept with IC 556 featuring torque processing. Design#1: Mosfet based DC Motor Speed Controller A very cool and easy DC motor speed controller circuit could be build using a just a … Read more3 Simple DC Motor Speed Controller Circuits Explained
Technically it may seem impossible to illuminate a 3.3V LED with a 1.5V source, but the amazing concept of joule thief makes this look so easy and effective, and virtually unbelievable. Moreover the circuit additionally makes sure that not a single drop of “joule” is left unused in the cell. A joule thief circuit is … Read more3 Best Joule Thief Circuits