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…
A computer mouse is an input device that is used to control the cursor on a computer screen. It allows the user to move the mouse pointer across a surface…
In modern radio receivers you can find an interesting KT0936M microcircuit. What is so interesting about this microcircuit? It is interesting that this DSP radio receiver can receive radio stations…
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…
I bought a digital thermometer with a humidity sensor on Ali. I was attracted by its price. Measures temperature from -50 to +110 C with an accuracy of +/- 1…
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…
With this simple device called a converter, you can receive FM radio stations in the 88-108 MHz range on a 52-72 MHz radio. You can also receive 123-143 MHz signals…
Direct conversion receiver. Such radio receivers are capable of excellent reception of CW signals and single-sideband SSB signals. Usually you can hear such signals on short waves, this is how…
The Retekess company has released a new radio receiver, Retekess tr111. This radio receiver can be controlled from your smartphone. Here are its characteristics: Brand: RetekessSpecial Feature: Bluetooth, APP Control, SOS, Rechargeable,…
smd chip 9A1LZ BDGCFA chip LED driver Chip HC2015,HC2020 Power bank model HB-SOS Flarx 200243AE (D5323) chip from the phone BPON797 from bluetooth earphone Microcircuit MX24-1. Used in the radio…
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…
For spare parts today, the board from the electrolux hob and the panasonic th42pv8 plasma TV will go On the board from electrolux kite 387 4371 00 rev.b there is…
In old image scanners there is a voltage converter for a fluorescent lamp.This lamp highlights the image when it is being scanned.In more modern scanners, LEDs are already used for…
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…
In this article I will tell you how to make a simple mechanical TV, with simple electrical control circuits.This "TV" will show simple images.If you want to make a high-quality…
In the review, there are current pliers with the BSIDE U6 multimeter function.With this tool, you will be able to measure AC and DC current in a contactless way, measure…
With this DT71 digital tweezers you will be able to measure voltage, resistance,inductance,capacitance, frequency, check diodes.There is also a built-in generator of various signals and there is also an automatic…
Variable capacitors were used in radio receivers to tune into radio stations.As a rule, an inductor was connected to the capacitor, and by changing the capacitance of the capacitor, we…
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…