Troll circuitry. Decision
A few months ago, a task from Youtube user Fredzislaw100 about three LEDs with switches (a post on Habré ) made a lot of noise. Let me remind you: the video shows how, from ordinary, at first glance, details - a battery, a resistor, three LEDs and three switches - they assemble a series circuit in which each switch controls its own LED.
What is the secret of focus? Recently, the author has published a clue.
No cheap tricks like video editing or invisible thin wires. The scheme is really assembled as shown in the video. Another thing is that the components were slightly modified, or rather, only the resistor and the battery remained intact.
A two-frequency alternator (300 Hz + 5 MHz) is built into the battery terminal block. Two LEDs (LED1 and LED3) are shunted by conventional diodes and capacitors, the same is done with the corresponding switches (SW1 and SW3). This part of the circuit operates at a low frequency. The diodes are turned on in the opposite polarity, so one LED illuminates a positive half-wave current and the second a negative one. Switches allow you to independently skip or cut one or another half-wave.
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The third LED (LED2) is shunted by an inductor, and it is lit by the RF component. An inductance is also built into its switch (SW2). The high frequency current easily passes through capacitors on the remaining elements, so that the third LED is controlled independently of the first two.
Video showing the manufacture of components:
It remains to admire the author's straightforwardness and wait for the next version, with five LEDs.
What is the secret of focus? Recently, the author has published a clue.
No cheap tricks like video editing or invisible thin wires. The scheme is really assembled as shown in the video. Another thing is that the components were slightly modified, or rather, only the resistor and the battery remained intact.
A two-frequency alternator (300 Hz + 5 MHz) is built into the battery terminal block. Two LEDs (LED1 and LED3) are shunted by conventional diodes and capacitors, the same is done with the corresponding switches (SW1 and SW3). This part of the circuit operates at a low frequency. The diodes are turned on in the opposite polarity, so one LED illuminates a positive half-wave current and the second a negative one. Switches allow you to independently skip or cut one or another half-wave.
')
The third LED (LED2) is shunted by an inductor, and it is lit by the RF component. An inductance is also built into its switch (SW2). The high frequency current easily passes through capacitors on the remaining elements, so that the third LED is controlled independently of the first two.
Video showing the manufacture of components:
It remains to admire the author's straightforwardness and wait for the next version, with five LEDs.
Source: https://habr.com/ru/post/137244/
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