Oscillator circuits are the ones which produces certain waveform with specified frequency. These kind of circuits come in handy when there is a need of signal source for any specified application. Here i have built a primitive Wien bridge oscillator…
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Battery charge indicator circuits are very useful modules for efficient use of the Li batteries. These kind of indicators generally measures the voltage in the battery and indicate the charge by turning up any appropriate LED’s. But its not necessary…
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Spy Bug circuits are something that’s used when we need to listen to conversation without being noticed or to simply put to spy on a person. Generally Spy bug circuits are constructed using a Mic, amplifier and speaker. The medium…
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Alarms are pretty handy to use in alerts, detectors, sensors etc. In such applications the loudness of the alarm can be a challenge since some most circuit you find online won’t produce audible sound. So to overcome this defect here…
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Pump controller circuits hold great importance to manage the water efficiently. Automating water fill pumps and sump pumps based on the availability of the water in the tank or sump are the best way for effective management. Here we are…
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Model trains are fun toys which every one of us used to play with in our childhood. Many sophisticated and attractive model trains are available in the market now a days yet the basic principle in build a controller for…
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Current sensors are used when there is a need to measure the amount of current consumed by a certain appliance or device. There are several methods to measure the current flow and we are about to use Hall effect in our…
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