Master classes:
Simple flasher on one transistor
There is a strong need to make the LED blink, in order to enhance the attraction of human attention to the signal. But to make a complex scheme, there is simply no time and place to place radio elements. I will show you a diagram consisting of only three, which
Simple light music at 220 V
This is the simplest light music has only one element. Yes, absolutely one and nothing but: no resistors, no transistors ... It is quite possible to assemble such a light and music installation in 30 minutes. All you need is one solid state relay.
Simple metal detector
I can undoubtedly say that this is the simplest metal detector of all that I have seen. Which is based on only one chip TDA0161. You will not need to program anything - just compile it. Still, his huge difference is that he
Simple wall lamp
This wall lamp gives a smooth and even illumination. This is achieved by the fact that light is reflected from external obstacles and scattered. Such a peculiar lamp can, if desired, be assembled in about 30 minutes, of course having everything at hand. This wall
Simple circuit of a mobile signal detector
A mobile phone signal detector can detect the presence of an activated cell phone at a distance of about one and a half meters. Thus, the detector can be used to prevent the use of mobile phones in exams, in
Simple driver for a powerful LED
Probably everyone, even a novice amateur radio enthusiast, knows that in order to connect a regular LED to a power source, you need only one resistor. But what if the LED is powerful? Watt so at 10. What then? I will show you a way to do
LED power from a 1.5 volt battery
LEDs have long supplanted incandescent bulbs from almost all areas. It is understandable: the LED is superior in brightness to lamps, given its energy consumption. But LEDs also have a number of disadvantages. Of course, we won’t talk about everyone, but one
The simplest inverter 1.5 V - 220 V
I have not seen an inverter circuit easier than this. For repetition, you need a minimum of parts - there are no more than 10 pieces. To obtain a voltage at the output of 220 volts, we need one finger battery with a voltage of 1.5 volts. Inverters needed
DIY do-it-yourself hidden wiring detector
An AC voltage detector is a device that detects the presence of alternating current over a short distance without any electrical connections to the line. This simple device will help you determine if there is a life-threatening voltage.