IC LM741
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18650 Lithium Battery Capacity Tester using Arduino With the advent of technology, our electronic gadgets and appliances are becoming smaller and smaller with more functional and complex applications. With this increase in complexity, the power requirement of the circuit has also increased and in our quest to make the device as small and as portable as possible, we need a battery which can provide high current for a long… |
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Zero-Crossing Detector Circuit A zero-crossing detector circuit is a useful application of an op-amp as a comparator. This electronic circuit precisely identifies when an AC waveform transitions through zero voltage, tracking the changes in the sine waveform from positive to negative or vice versa while it crosses zero voltage. It can also be used as a square wave generator. They have many… |
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Automatic Light Fence Circuit with Alarm Light fence circuit is used to detect the presence of any human or object in a particular area. The detecting range of Light Fence Circuit is about 1.5 to 3 meters. It’s quite simple to design the circuit using LDR and Op-amp. This portable circuit can work smoothly with a commonly available 9V battery and the alarm sound generated from the buzzer is loud enough to detect… |
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Peak Detector Circuit Peak Detector Circuit is used to find the peak amplitude in a rapidly changing waveform. Peak detectors are generally used in the sound measuring applications to find the maximum level of sound in a particular area or place, that helps in determining the maximum loudness level in that place. So, like this there are number of applications where a Peak Detector Circuit is used… |
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LC Meter using Arduino: Measuring Inductance and Frequency All embedded lovers are familiar with multimeter which a great tool to measure voltage, current, resistance etc. A multimeter can measure them easily. But sometimes we need to measure inductance and capacitance which is not possible with a normal multimeter. There are some special multimeters that can measure inductance and capacitance but they are costly. We already built… |
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Voltage Follower using Opamp Voltage Follower is simply a circuit in which output follows the input, means output voltage remains same as input voltage. It is also commonly known as Unity gain Opamp Amplifier or Opamp Buffer. Here we construct a voltage follower using Opamp LM741 and see how its output follows the input. We already discussed about it in our Non-inverting Operational Amplifier tutorial,… |
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Wireless Switch Circuit using LDR and CD4017 Have you ever feel a shock by touching the switch? It does not generally happen but sometimes physical contact with switches may be dangerous. But what if the switch gets wireless and you don’t have to press any button at all for switching on or off your home appliances. So today we are building a Simple Wireless Switch Circuit in which there is no need of physical contact… |
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Temperature Controlled DC Fan using Thermistor “Automation is good, so long as you know exactly where to put the machine’’, In this tutorial we are making a Temperature controlled DC fan using Thermistor, as it starts above the preset level of temperature and stops when the temperature return to normal condition. This whole process is done automatically. We have previously made the Temperature controlled Fan using… |
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Op-amp IC Tester Circuit Op-amp (Operational Amplifier) is very important component in Electronics, and used in many Electronics circuits to serve different purposes. We have used different Op-amps in many circuits and developed a separated section for Op-amp Circuits. Op-amp basically has Voltage Comparator inside, which has two inputs, one is inverting input and second is… |
