You are browsing the site archives for July 2023.
As many may have already assumed from the name, in native metal soldering, the process of fusing parts together is accomplished without solder, or without the use of another, more easily melted metal. It occurs either by fusing the molten ends and edges of the parts to be soldered, or by using molten pieces of …
Read more A nugget of solder
Trees not only provide us with oxygen, tasty fruits and an escape from the baking sun in the hot season, but also an excellent building material. Every person should protect and preserve the living nature (sometimes even from himself) and rationally use wood material. In order to make a quality wooden product, it is necessary …
Read more Types of wood
Many amateur radio designs use fuses or self-resetting fuses as fuses. In order to quickly and easily detect the failure of your fuse (protection tripping) you can use the fuse blown indication circuit, which is described in our article. A circuit where the indicator is an LED with three legs: The considered circuit of the …
Read more LED electronic fuse blown indicator circuit diagram
The inductance coil as a radio-electronic element is quite common. Sometimes not replaceable, for tuning many radio receivers and is used in many devices. It should be noted that exclusive things, sometimes do not get exclusive coils, so it is necessary to know not only the device coil inductance, and formulas for its calculation, but …
Read more Inductance coil by your own hands
It is quite natural that both a beginner and an experienced amateur radio operator face the problem of lack of a power supply. In the most primitive case, this problem can be solved by using a circuit with a quenching capacitor. In our article we consider the use of a reactive resistor to obtain the …
Read more A power supply unit with quench capacitor
This article presents an elementary circuit of a capacitance meter on a logic chip. Such a classic and elementary circuit solution can be reproduced quickly and easily enough. Therefore, this article will be useful for a beginner amateur radio operator who wants to build an elementary capacitor capacitance meter. Operation of a capacitance meter circuit: …
Read more Capacitor capacitance meter schematic
Electric current passing through the human body can cause two types of injuries – electric shock and electric trauma. Electric shock is more dangerous because it affects the entire body. Death occurs from paralysis of the heart or respiration, or sometimes from both at the same time. Electrical Injuries: Electric traumas are defined as electrocution …
Read more Effects of electric current on the human body
Every radio amateur should at least a little, but understand the marking of certain radio electronic components. Of course, for this purpose there are many different reference books, in which such information is presented in sufficient volume. This article contains data on the code marking of capacitors and summary tables of capacitance conversion. In order …
Read more Capacitor capacitance conversion
Probably many of the readers of this article know such a common, versatile device as an oscilloscope, which is used for observing digital and analog signals. This article is useful for beginners or inexperienced radio amateurs who are just thinking about buying an oscilloscope. The following information is informative, but may help beginners in choosing …
Read more Oscilloscope review
This article contains basic terms, the correct perception of which is the foundation for understanding the work of radio electronic devices and circuits. This article briefly outlines the concepts known to many from the school physics course, but thanks to the brevity of the material, they will not be difficult to master and memorize the …
Read more For beginner radio amateurs, the basic values of radio electronics