Industry News
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The difference between switching power supply and linear power supply
First, from the principle Principle of linear power supply Linear power supply mainly includes power frequency transformer, output rectifier filter, control circuit, protection circuit and so on 1. Pass the alternating current (AC) through the transformer to reduce the voltage amplitude. 2. After...Read more -
Temperature control alarm circuit
The temperature control circuit is composed of a special intelligent temperature sensing integrated circuit. It has high and low temperature light tube function, no mechanical contact, wide temperature control range. Safe and reliable, high temperature control accuracy. (1) Circuit composition a...Read more -
Circuit design of zero-crossing power regulator+ A simple small power supply circuit
Zero crossing power regulator circuit Although the zero-crossing power regulation circuit introduced in this paper is simple, it can work reliably. It is suitable for the power adjustment of various electric heating appliances and the power adjustment of series excited motor. For electrical staff...Read more -
Solar flash lamp
This is a LED flash (see the attached picture), it does not flash during the day, using solar cells to charge the battery, and at night by the battery power. Give off a flash. Suitable for temporary construction sites and other fields cooperation warning lights. Flash circuit: RC oscillator is fo...Read more -
Why does a transformer become magnetically saturated?
If at a meal we have eaten a lot and the stomach cannot hold more, we are said to be “full”. In transformers, a similar situation occurs. According to Ampere’s law: any wire that carries an electric current will generate a magnetic field around it. As the current (voltage) incre...Read more -
Circuit Fault Tracker
When repairing the amplifier circuit of radio, tape recorder, power amplifier, combination speaker, etc., the fault finder can be used to determine the fault location quickly and accurately. It has the characteristics of compact, light and easy to carry, and can be used as a regular tool for elec...Read more -
Infrared radiation alarm circuit
This circuit is mainly composed of power supply circuit, infrared transmitting circuit, infrared receiving circuit, logic processing circuit and alarm circuit. The circuit principle diagram of this infrared anti-theft alarm experimental model is shown in the following figure. VT7, VT8 and relate...Read more -
Sunday reminder device
The circuit shown in the picture is one that works on a seven-day weekly cycle. You can switch S1 on the diagram within seven days. Select a day as a reminder day. In order to remember a particular job, event or other important thing that should be done that day, the circuit’s reminder mod...Read more -
Energy saving LED flashlight circuit
The flashlight battery is not durable, not too long to replace the battery, which will bring a lot of trouble. Recently, an energy-saving LED flashlight was modified with a small flashlight to solve this problem. Due to the use of a dedicated LED driver integrated circuit, the original small flas...Read more -
Simple and practical LED light driver circuit
LED lighting set low power consumption, long life and other advantages, is becoming increasingly popular. With the continuous decline in prices, LED has begun to be applied in home lighting. Recently contacted several commercially available 36-head, 60-head LED lights, power consumption is only a...Read more -
Switching transformer: ② Pulse sequence magnetization of transformer core
Pulse sequence magnetization of single-excitation switching power supply transformer core part 2 The magnetic field strength H drops to zero, but the magnetic flux density in the transformer core can not follow the magnetic field strength to zero, but can only drop to a residual value of magnetic...Read more -
Switching transformer: ① Pulse sequence magnetization of transformer core
Magnetization of the core of a single-excitation switching power supply transformer by pulse train part1 For simplicity, we equivalent the single-excited transformer switching power supply to the circuit shown in Figure 2-1, where we regard the DC input voltage through the control of the switch o...Read more