In the diagrams of radio transmitters, in the output stage you can see an LC filter to which the antenna is connected. Why is this filter needed? The thing is…
On the Internet you can see various shows called “Tesla Coil and Faraday Cage”. In this show, people enter a metal cage and high-voltage sparks strike the cage, but these…
Common mode choke. This detail can be seen on boards from switching power supplies, next to the network connection socket. Choke consists of two identical coils, which are wound with…
On the boards of old TVs you can see TV tuners on the kinescope. These tuners use double-gate FETs and what's called a MOSMIC (a dual-gate transistor with bias resistors…
Datasheets for MOSFET transistors indicate such a parameter as RDS. This is one of the main parameters of the transistor and it shows the resistance of a fully open drain-source…
In radio-controlled models, you can see that three capacitors are connected to the electric motor.One capacitor is parallel to the power supply, and the other two are from the power…
Recently, while disassembling an old DVD player, I discovered that a 220 V power switch is connected in parallel to a 10 Nf capacitor with a voltage of 2 kV.Why…
TVS diode (Transient voltage suppression), such an electronic component that you can see on electric motors, in electrical circuits next to a MOSFET gate, etc.This part serves to protect the…
On the electronic circuits, you can see that two diodes are connected in counter-parallel.This can be seen in the high frequency amplifier circuit of the radio receiver.Why are they doing…
In the electrical diagrams you can see that the diode is connected in parallel to the relay coil, the cathode of the diode is connected to the positive terminal.This is…
Hello everyone.Today, almost every normal household appliance has special filters installed that do not pass interference signals from the 220 Volt network to the device or back from the equipment…
The diode bridge is used to rectify alternating current into a constant pulsating current and is mainly used in rectifiers in power supplies.This is its standard application and nothing unusual…
A posistor is a radio component-a semiconductor with a positive temperature coefficient of resistance.The basic principle of operation of this part is simple:when heated, the posistor increases its resistance or…