Master classes:
Triac power controller
Such a simple, but at the same time very effective regulator, can be assembled by almost anyone who can hold a soldering iron in their hands and at least slightly read the diagrams. Well, this site will help you fulfill your desire. The presented regulator regulates
Stabilizer for LEDs and DRL
Almost all motorists are familiar with such a problem as the quick failure of LED lamps. Which are often put in the side lights, daytime running lights (DRL) or in other lights. As a rule, these LED lamps have low power and
LED water level indicator
Almost anyone who can even hold a soldering iron in their hands can do a water level sensor with their own hands. And this article will help you step by step, with the help of photographs, to make an indicator of the water level in the tank with your own hands from simple and
Simple 4x50W power amplifier
This simplest audio frequency amplifier is capable of delivering 50 watts of power to each of the four channels. In total, it turns out 200 watts of sound power. And this, as it turned out, is not the limit. The microcircuit on which the amplifier is built can give 80
Simple FM receiver on a chip
You will need only one chip to build a simple and full-fledged FM receiver that is capable of receiving radio stations in the range of 75-120 MHz. The FM receiver contains a minimum of parts, and its tuning, after assembly, is minimized. So
Power supply on zener diode and transistor
The stabilized power supply considered below is one of the first devices that are assembled by beginner hams. This is a very simple but very useful device. For its assembly does not need expensive components that are enough
Simple antenna amplifier
The more I learn about the modern elemental base, the more I am surprised at how easy it is now to make electronic devices that you could only dream of before. For example, the antenna amplifier that will be discussed has a working
Simple color music on LEDs
A very simple three-channel RGB color music on LEDs does not contain scarce or expensive components. All the elements can be found in anyone, even the youngest radio amateur. The principle of color music is classic, which has become true
A simple walkie-talkie with three transistors
This shortwave radio circuit contains only three transistors. The easiest walkie-talkie to repeat by beginner hams. The design was taken from an old magazine, but it has not lost its relevance.
Simple tester for checking radio elements
Greetings, dear friends! In this article I will show and tell you how to make a very simple tester for checking radio components such as diodes, transistors, capacitors, LEDs, incandescent lamps, inductors and much more.
Smartphone tester
In this article I will tell you how to make a tester from a smartphone for dialing electrical circuits for an open or short circuit. In fact, I’ll make a prefix for a cell phone (rather, even an adapter with probes), with which
The simplest oscilloscope from a computer
It is no secret that beginner hams do not always have expensive measuring equipment at hand. For example, an oscilloscope, which even in the Chinese market, the cheapest model costs about several thousand. Sometimes an oscilloscope is needed for repair
Very simple powerful chip amplifier
I would say that this is just a super simple amplifier containing all four elements and delivering 40 watts into two channels! 4 parts and 40 watts x 2 power output Karl! This is a godsend for motorists, as the amplifier is powered by 12 Volts, full
LED flasher on transistor
One of the simplest circuits in amateur electronics is an LED flasher on a single transistor. Its manufacture is within the power of any beginner who has a minimum set for soldering and half an hour of time.
Simple infrared sensor
The simplest infrared sensor, which will report the presence of an obstacle, can be done with just one transistor. This homemade product is more likely not a practical application, but rather a theoretical one, demonstrating the operation of an infrared presence sensor
The simplest battery indicator
The most amazing thing is that the circuit of the battery level indicator does not contain transistors, or microcircuits, or zener diodes. Only LEDs and resistors that are turned on in such a way that an indication of the level of
Simple flasher on the timer NE555
A very simple flasher can be assembled on the NE555 chip, which is quite common among hams. The circuit contains a small number of elements and allows you to control one or two LEDs.
Simple universal auto charger
I tried to insert in the title of this article all the advantages of this scheme, which we will consider and naturally I did not quite succeed. So let's now consider all the advantages in order. The main advantage of the charger
Simple flasher for two LEDs
Almost every beginner amateur radio collector multivibrator transistors. This scheme does not require a large number of components and has a principle of operation that is quite understandable for beginners. However, the work of the finished product, despite the simplicity,
Current Indicator
There is a need to track the presence of a current flowing in a circuit in two states: either there is or not. Example: you are charging a battery with a built-in charging controller, connected to a power source, but how to control the process? You can of course
Simple induction heater 12 V
A simple induction heater consists of a powerful high-frequency generator and a low-resistance coil coil, which is the load of the generator. A self-excited oscillator generates pulses based on the resonant frequency of the circuit. As a result
Sensitive microphone for computer
The simplest computer microphone is a Chinese capsule connected to the input. This microphone capsule is also powered by a computer input. It consists of a condenser microphone with an amplifier on a field effect transistor. The sensitivity of such a capsule
Simple Li-ion Battery Discharge Indicator
How tightly Li-ion batteries entered our lives. The fact that they are used in almost all microprocessor electronics is already the norm. So radio amateurs have long taken them into service and use them in their homemade products. Contribute to this
Simple automatic adjuster
Here is a simple diagram for automatically turning on the fan and controlling its speed depending on the temperature of the sensor. This simplest circuit, consisting of only two elements, can be used in your amplifiers, power supplies, computers and