Why the transformer in the speakers, power supply, microwave, amplifier and other devices can buzz, and also what to do in such a situation. Causes of increased noise during operation.

To power the LEDs, direct current and low voltage are used. Therefore, it is important to know the difference between the power supply from the driver and the transformer in order to choose a suitable device.

Various types of solders are used to solder aluminum, copper, steel, pipes and electronic components. Find out what solders are and where they are used.

Methods for measuring AC and DC voltage. How to measure voltage and how to do it right. Examples of measuring voltage in different conditions.

The principle of operation of bipolar transistors, the internal device, wiring diagrams with a common emitter, collector or base. Two main operating modes.

What is the electric strength of insulation and what are the types of breakdown. Characteristics of the electric strength of gases and power cables and the reasons for its decrease.

The article discusses the definition of EMF and voltage, the main parameters of the current source and its internal resistance, and most importantly, the difference between the EMF and the voltage.

What is EMF in physics, chemistry, electrical engineering and how it arises. Definition of concepts and formulas. The difference between EMF and voltage in an electric circuit.

What is a Hall sensor, what is its working principle and purpose. The device and types of Hall sensors, their applications. Symbol on the diagram.

Triacs are semiconductor switches that are used to switch mains voltage circuits. Find out how the triac works and why it is needed in a circuit.

What dependence is established by the law of the total current for the magnetic field. The wording of the law in simple terms and all the necessary formulas for calculation.

What are the ranges of denominations of radio components? Typical values ​​of resistance, capacitance and inductance are given in the article. Tables and examples of row selection.

Simple ways to check the triac for good condition. Checking triacs and thyristors with a multimeter, a battery with a light bulb, a special tester.

The device, the principle of operation and the purpose of the diode bridge are examined in detail. Characteristics of this element and rectifier circuit. How to solder and connect a diode bridge.

What is an inductor, what is its principle of operation and purpose. The main types and characteristics of coils, as well as marking options.

What is a photoresistor, what is its principle of operation and purpose. The main technical characteristics of photoresistors and their scope.

What is a thermistor, what is its principle of operation and purpose. The main types and characteristics of thermistors, the scope of all options.

The main difference between a transformer and an autotransformer. What is the difference between these two devices. Comparison of the principle of operation, design and scope.

Methods for producing alternating current at home and on an industrial scale. A brief explanation of the basic definitions. The device of the alternating current generator.

What is a voltage divider, what is its principle of operation and purpose. Types of voltage dividers and real examples of their application in electrical circuits.

What is a capacitor, how is it built and what is it for.The principle of operation and the scope of capacitors of different types. Characteristics of energy storage.