Some unknown models of ferrite cores in hand should indeed be screened. At the very least, it is necessary to determine whether they can be used in the shortwave band. (Some were salvaged from broken computer power supplies.) Prepare the components. Arrange the layout of several components on the perfboard. Soldering. Take out two unknown … Read more
How to measure the quality of diodes? How to measure the quality of a diode? Diodes are one of the most commonly used components in electronic circuits, and learning how to measure the quality of a diode is an important skill in the study of electronic circuit knowledge. Let’s understand how to measure diodes. 1. … Read more
Use the unidirectional conduction characteristics of the parasitic diode inside the MOSFET to determine its health. Step 1: Short-Circuit the Three Pins for Discharge The purpose of this step is to discharge the parasitic capacitance inside the MOSFET to prevent any voltage difference, which could cause erroneous measurements. Step 2: Measure the Internal Diode Set … Read more
Electricity Electricity has become an indispensable energy source in our lives. As temperatures rise this season, the occurrence of rainy and humid weather has also increased, leading to more reports of electrical leakage issues at home. For those with no basic knowledge of electrical work, discovering leakage in the home can be a big headache!!! … Read more
1. Introduction In the production of electronic cones, it is necessary to detect a 20kHz electromagnetic navigation signal to unify the reset state of the electronic cone indicator. To reduce detection costs, the LM567[2] audio signal detection chip is used to detect the electromagnetic navigation signal. This DIP8 packaged LM567 is convenient for testing on … Read more
★ Digital multimeters are widely used in people’s daily life and study due to their simplicity, digital display, ease of operation, and strong anti-interference capabilities. This article briefly describes the common faults encountered during the use of digital multimeters and provides some daily handling methods. 1. Several Common Fault Analysis Methods for Digital Multimeters 1.1 … Read more
Using a multimeter to measure circuit faults is one of our common methods. Here, I will discuss how to use a multimeter to check for circuit faults. When we check for circuit faults with a multimeter, we mainly use three ranges of the multimeter for measurement: First, use the resistance range to measure the resistance … Read more
Oscilloscope, as its name implies, is a machine that displays waveforms, and it is also known as the “eye of the electronic engineer.” Its core function is to display the actual waveform of the measured signal on the screen, allowing engineers to locate problems or evaluate system performance, among other tasks. Its development has also … Read more