The above figure shows the internal structure of a brushed DC motor. The commutator on the rotor rotates with the rotor and keeps in contact with the two brushes in turn. When the motor rotates, spark'...

Due to the rich content, good sound quality, wide frequency response, and the upper limit of the audio frequency response of FM radio with good quality can reach 15000Hz, especially the emergence of F'...

The working principle of the device application circuit is shown in Figure 6. Its typical application is as a wire-break burglar alarm. X is a very thin enameled wire, which is connected to the circui'...

The non-external voltage-controlled phase-loss protection controller is shown in the figure above. The capacitor is used to step down the voltage to provide the working voltage. When the phase is lost'...

See the attached diagram for the circuit. In the figure, T is a 3AG germanium high-frequency triode. Here, the temperature sensor is made by using the characteristic that the penetration current ICeo '...

In the market, alarms that use magnets as activation signals are very common. When the magnet and the alarm are close to each other, the alarm does not sound, but when the magnet and the alarm are rem'...

The circuit diagram of the electric mosquito killer is shown in Figure 1. It consists of an ultraviolet lamp light-emitting circuit, a high-voltage DC generator, a high-voltage circular power grid, et'...

The figure shows the LM4904 differential input audio amplifier circuit. The audio signal is input to the IN terminal and the -IN terminal in a differential form.

The hysteresis voltage comparator is the same as the temperature control switch mentioned above, and can be understood by analogy. As we all know, the operational amplifier can be used as a comparator'...

When powered by a 5V power supply, its minimum output voltage can be adjusted to 0V. With the circuit structure shown in the figure, the minimum output voltage can be adjusted to nearly 500mV. The tem'...

System configuration: A new 30W semi-transistor amplifier is used to drive the speakers to produce bass, while the mid-range and treble are produced by the speakers inside the radio, and the audio sig'...

This circuit is a self-excited, flyback, transformer-coupled, PWM switching power supply; the power conversion process: alternating current (AC, input mains) → direct current (DC) → alternating curren'...

As shown in the figure, after RTD collects temperature on site, it converts it into voltage, which is then converted into 4-20mA current output by XTR105 and then transmitted via twisted pair cable an'...

This simple circuit uses the energy from solar cells to charge a lead-acid battery. The circuit consists of an oscillator, a DC booster, and a voltage regulator.

The circuit of this pulse wave generator is shown in the figure below. Working principle: 1. The trigger D1 forms an oscillation circuit. When IQ is 1, it charges C2 through R2, causing ICP to be trig'...

6N7P is a common cathode dual triode with excellent performance. It can be used for negative gate bias voltage amplification as well as zero gate bias power amplification. The tube has low internal re'...

The scheme of motorcycle electronic ignition is as follows: the ignition part of the original magneto is shown in Figure 1. When the contact is disconnected, the engine ignites. In order to use the or'...

In this article, we will discuss the applications and identification of NPN sensors, clarifying why they work and how to properly use them in a control circuit setting.

Distance relays respond to the voltage and current at the relay location, i.e. the impedance. The impedance is fairly constant per mile, so these relays respond to the distance between the relay locat'...

This article introduces the Advanced eXtensible Interface (AXI), an extension of AMBA. The AXI protocol was originally designed for high-frequency systems to meet the interface requirements of a wide '...