Summary of knowledge about integrated operational amplifiers

One: Integrated amplifier Referred to as integrated operational amplifier, it is a high-gain analog integrated circuit composed of multi-stage directly coupled amplifier circuits, and it is also the most common type of linear integrated circuit. Different feedback networks are connected between the input and output of the integrated integrated amplifier, and the functions of signal […]

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Build an LED VU Meter Using the LM3914 and LM358

We can think of the volume meter as the equalizer present in the music system. In it we can see the lights (LEDs) that dance according to the music, if the music is loud the equalizer hits its peak, and in low music it stays low. We also built a volume meter or VU meter, […]

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Design of Simple Microphone Preamplifier Circuit Based on LM358

Here is a simple microphone preamplifier circuit design based on the monolithic IC LM358. The circuit is very simple, cheap and easy to build. This mic preamp circuit operates on 9V DC and you can use a 9V battery for this circuit. Components list: R1、R3、R4 = 10K R2 = 1K R5 = 100K-1M potentiometer C1 […]

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Bluetooth speaker design circuit diagram

The following figure is the design schematic diagram of a typical Bluetooth small speaker, and its main components are: (1) The receiving module adopts OVC Bluetooth module, which has the advantage of low cost compared with CSR scheme; (2) Ht6809 is selected as the power amplifier IC, and its unique anti clipping distortion function can […]

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Operational amplifier popular explanation operational amplifier lm358 into the clamping state of the principle and problems to avoid

Operational amplifier is a kind of amplifier that can realize different arithmetic operations by changing peripheral devices. Any operational amplifier integrates many transistors. These transistors not only constitute the basic working circuit, but also realize the protection functions such as input and output voltage clamping. However, due to the production process, parasitic transistors and diodes […]

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Complete circuit diagram of induction cooker current detection (lm358 / current inspection pot / current transformer detection circuit diagram in detail)

Current detection circuit diagram of induction cooker (1) When the induction cooker is heating normally, if the heating power is increased or increased, the current flowing through the copper wire will also increase correspondingly. The amplifier circuit composed of comparator lm358 and feedback resistance R016 will be amplified and sent to 16 pin of single […]

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