With this device, you can adjust the brightness of a powerful halogen lamp at a voltage of 12 volts.The device uses pulse-width modulation, so the key-field transistor will not get…
While analyzing the car alarm system, I found an interesting sensor made on a piezoelectric element to which a spring is connected.As you know, if you compress the piezoelectric emitter…
In this article I will tell you how to make 10 simple relay devices.Basically, I will use the relay number 1, relays 2 and 3 will be in two circuits.…
With the help of this high-frequency generator, it is possible to set fire to paper or melt small pieces of metal from the fire of an antenna or one wire.…
This microwave motion sensor will see the movement of a person at a distance of more than 10 meters and notify about it by blinking the LED. The principle of…
The TDA7056 chip is a 3-watt low-frequency monophonic amplifier with a bridge output and single-ended power supply. You can see such a chip on the circuit boards of old TVs.…
With this high voltage generator, you can light fluorescent lamps and conduct experiments with high voltage.In this article, I will present two oscillator circuits, one with a bipolar transistor and…
There are microcircuits in cell phones that amplify a weak high-frequency signal by power, and one of these microcircuits is the RF3140.This microcircuit was used in old cell phones, today…
With this electronic fishing rod, you can fish on winter fishing.Do not be confused with another fishing rod, which is prohibited by law, this device is quite harmless and legal,…
On the basis of a powerful IRF3205 field-effect transistor, you can assemble an original soldering iron with which you can solder, and this will be a touch soldering iron, you…
With this simple device, you can adjust the speed of the drill, grinder, in general, electric motors connected to the 220 Volt network.You can also adjust the heating of the…
The BTA16-600 triac is designed for switching loads at alternating current up to 16 amperes.The number 600 indicates that the triac can operate at a voltage of up to 600…
A simple battery charger, with which you can charge them and adjust the current at the output of the battery.The device is not assembled very according to the standard scheme,…
The well-known fan cooler, which can be found in household appliances and mainly in computer power supplies, operates at a voltage of 5-12 Volts.But what if the fan needs to…
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…
There is a cable for charging phones, tablets and other equipment on sale, which has a backlight, and it does not just shine monotonously, but can change colors and there…
On the basis of a laser pointer and a motor, you can make a simple laser level, with which you can set a straight line on the surface. This will…
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…
It would seem that an ordinary computer mouse and there is nothing so special about it, but not everything is so simple, because in a computer mouse there is a…
The RF2418 chip is a frequency converter that can be used in radio receivers at frequencies of 433MHz and 915 MHz.I found such a chip on the remote control board.It…