The control circuit for starting and running without missing a phase is shown in the schematic diagram. Just by adding a few intermediate relays and connecting the circuit according to the diagram, it'...

This is a modified machine with 4 antenna (LNB) inputs and 4 independent audio and video outputs. You can use a large TV to watch the channels on one of the satellites (such as A), and the other 4 sma'...

The transmission method of this family integrated TV signal is to mix the signals of satellite TV receivers, DVD (VCD), video recorders and other audio and video equipment with the signals of cable TV'...

Here I would like to introduce you to a pocket transmitter, which is very suitable for beginners. The circuit is simple and easy to make, the cost is low, the output power does not exceed 5-8mW, the t'...

The power of household power inverter is only about 300 watts, which can easily cause damage to the machine due to overload. Fuses are generally used for overcurrent protection, which has poor effect '...

The circuit is mainly composed of lithium battery protection dedicated integrated circuit DW01, charge and discharge control MOSFET1 (containing two N-channel MOSFETs) and other parts. The single lith'...

This circuit is shown in the figure below. Working principle: IC1-1C3 are three decimal counting dividers CD4017. IC1 and light-emitting diodes LED1~LED10 form the ten-digit display of the heavenly st'...

This is an extremely simple circuit that can produce a siren sound similar to that of an American police car. The lights will flash synchronously while the siren sounds. This circuit can provide more '...

MCl3175/13176 is a monolithic transmitter chip designed for FM/AM communication systems, which complies with FCC Title47: Part l5 standards. MCl3175/13176 can also be used as UHF and 9...

This figure shows the SSB mixer circuit composed of the common NE602. C1, C2, C3, RFC, JT and the internal oscillator circuit of NE602 form the VXO circuit, and the generated local oscillator signal i'...

This circuit is a single sideband amplitude modulation signal detector. Its demodulation principle is to multiply the received single sideband (SSB) signal with the transmitted carrier recovered by th'...

As shown in the figure, the circuit uses LM565CN to form a 10kHz±3kHz FM demodulation circuit. The differential demodulation output of V1 and V2 is level-shifted and amplified by the A1 differential a'...

The author designed a simple constant current source LED drive circuit, which has good effect after electronic circuit simulation and actual circuit experiment. The circuit is shown in Figure 2.

Electrolytic capacitors will leak over time. The circuit shown in the attached image allows you to test the leakage of capacitors and decide whether they are worth using. You can suppress leakage by t'...

As shown in the figure, the circuit includes two parts: ultrasonic transmitter and ultrasonic receiver and control circuit. It uses the characteristic that ultrasonic wave has large propagation loss i'...

The figure shows a lithium battery charging integrated circuit. In the figure, IClMAX1811 is a lithium battery charging control circuit. When K is connected, the charging voltage is 4.2V. When K is di'...

The uA78S40 is a switching regulator IC that can be used in a variety of applications. The uA78S40 is an integrated switching regulator circuit that has a reference voltage source circuit with tempera'...

The circuit is simple and clear, a 6BM8 tube, a triode constitutes the front stage RC coupling voltage amplifier, and the open loop gain is about 56 times. In order to improve the characteristics of t'...

The zero-crossing power regulation circuit introduced in this article is simple but can work reliably. It is suitable for power regulation of various electric heating appliances, power regulation of s'...

Figure 1 is the circuit diagram of this power amplifier. There are only about 20 components in the power amplifier, including transistors. At first glance, it looks like a simple schematic diagram, bu'...