Category: IC 741 Based Projects

IC 741 is the most used and popular operational amplifier IC, because of its unique feature and low price. Various op-amp 741-based projects are already posted in the operational amplifier-based projects section. Now, here is a simple project using a couple of op-amps 741 IC called voltage into frequency converter. Description of voltage into frequency converter Circuit using 741 IC The circuit of voltage into frequency converter consists of a couple of op-amp 741, a couple of transistors, and a few passive components (resistors). The voltage of 0.5V to 15V…

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Various sound generator projects is already posted in bestengineeringprojects.com in alarm and sound generator section. Now here is one another sound generator circuit using most popular and versatile operational amplifier IC 741. The circuit posted here is of wind sound generator using IC 741 produces wind sound. Circuit Description of Wind Sound Generator Using IC 741 The circuit of wind sound generator comprise operational amplifier 741, two NPN transistors (BC148) and some passive components (resistors and capacitors). Transistors T1 and T2 generate wind sound. A jumper is connected to emitter…

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Now, here is another basic electronic project using the most versatile operational amplifier IC 741 “DC Volt Polarity Indicator”. Using the project DC volt polarity indicator one can know the positive and negative polarity of DC volt. This project is very useful for electronics hobbyists to check either battery polarity or polarity at the output of the DC source. The circuit present here is so simple that even electronics beginners can understand how the circuit works. Circuit Description of DC Volt Indicator Using IC 741 The heart of the circuit…

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As per the name of the circuit, it is clear that this circuit connects four different audio signals as one. So, it is call four channel audio mixer. Here is that simple circuit; “four channel audio mixer” using op-amplifier 741.  It is to be noted in the circuit that the op-amplifier 741 works here as an inverting amplifier. Circuit Description of four channel audio mixer: The circuit of four channel audio mixer is wired around op-amp IC 741 followed by few other active as well as passive components. The IC 741…

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