Types of transformerless power supplies In industrial production equipment. And radio amateurs very often use transformerless low-power power supplies in their designs. Usually, two types predominate. The first is pulsed, in which the mains voltage is rectified and then powers a pulse generator of a higher frequency, from the secondary voltage of which the output […]
Mili Micro Pico Nano consoles and confusion with Capacity The capacitor is its capacity, as well as some of the confusion that arises among beginning radio amateurs associated with this. Often when I touch on a capacitor in my videos or articles. Sometimes I hear questions: What is the difference between microfarad, nanofarad, picofarad, and so […]
Problem — lost signal from the antenna The situation is different, the TV stopped showing, writes: “ No signal” . There can be many reasons, but today we will focus on the power supply of the antenna amplifier. How to check it if you do not have a device at hand. Or you don’t have a device at all. And you don’t […]
What is a Capacitor Most radio components can be divided into two groups passive and active . And the capacitor must be attributed to the first group of passive components. In theory, any capacitor can be represented as two plates separated by an insulator. They are characterized by capacity. The unit of capacitance is the farad (F), defined as one coulomb per […]
About the fact that you can connect LEDs not only one at a time. And also in groups. We have already discussed the previous article. Serial connection of LEDs pros and cons As I said, there are not so many options for connecting LEDs. And we have already discussed the first option. It was a serial connection of […]
AMPLIFIER on one transistor Assemble an amplifier on a single transistor. It turns out it’s not so simple. You need to know some subtleties. And the main one is how to choose the operating point of the transistor? Let’s not get into the jungle of formulas and graphs, but let’s try everything in practice. I will still give a few […]
What are MOSFETs afraid of? Experience grows in proportion to the burned radio components. There is such a saying. Well, there is another wise saying “A smart person learns from his mistakes, and a wise person learns from others” . If all this is applied to radio electronics, then in order to avoid mistakes, we need to know […]