Design of Power Tester Based on LM324
The general-purpose integrated operational amplifier LM324 has four operational amplifiers, and a power supply tester can be made by using two of them. This tester is especially suitable for the inspection of mass-produced power...
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Design of power-down protection circuit for single-chip microcomputer based on LM358
In order to prevent data loss caused by sudden power failure in the single-chip microcomputer system, it is generally necessary to store important data in EEPROM. Due to the limited erasing life of EEPROM,...
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Design of linear DC regulated power supply based on LM358
In today’s society, people enjoy the great convenience brought by electronic equipment, but any electronic equipment has a common circuit – power circuit. The requirement of electronic equipment for the power supply circuit is...
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The working principle and characteristics of LM386
LM386 is a common type of integrated OTL type power amplifier circuit. It is an audio integrated power amplifier. It has the advantages of low power consumption, adjustable internal chain gain, large power supply...
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Walkie-talkie circuit based on LM386 design
The positive power amplifier integrated circuit LM386 is commonly known as “universal power amplifier circuit” because of its wide application. LM386 has the advantages of low power consumption, wide operating voltage range, few peripheral...
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Oscillator circuit composed of LM386
LM386 is a low-power audio amplifier integrated circuit. It adopts 8-pin dual-in-line plastic package. The working voltage is 4V-15V. When the power supply voltage is 12V, the output power of 300mW can be obtained...
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Measures and precautions for preventing self-excited howling of LM386
LM386 is widely used in audio power amplifier circuits. In most occasions or when used alone, LM386 can work normally, but when used in conjunction with other circuits, it may cause self-excitation and reduced...
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Typical application circuit of LM386
To minimize external components, the voltage gain is built in to 20. But by adding an external resistor and capacitor between pins 1 and 8, the voltage gain can be adjusted to any value...
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Pager circuit and voice circuit composed of LM386
Pager circuit is composed of a preamplifier stage and LM386 low-power integrated circuit. The circuit is simple, the cost is low, the volume is small, and it is easy to use. It is suitable...
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Design of low-power active sonar transmitter circuit and receiver circuit based on LM386
The development of modern sonar technology began in the 20th century and was initially applied in the military, that is, to detect, classify, locate and track underwater targets, conduct underwater communication and navigation, and...
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