It is very simple and easy to make a funny flashing light from several parts, and even powered directly from an alternating current network of 220 Volts. Three LED will flash vigorously and create an unusual lighting effect.
For the flasher you will need:
Transistors BC547 - 3 pieces -
LEDs - 3 pieces, any color. It’s better, of course, to take multi-colored ones.
Capacitors 470 uF 25 V - 3 pieces.
Resistor 100 K - 3 pieces.
Flasher circuit
As can be seen from the diagram, it contains three identical nodes with a single power supply through a diode. Transistors are connected in an unusual way and play the role of a threshold element. Their bases are not used. The principle of operation is simple: As soon as the capacitor is charged through a resistor to a certain value, the transistor opens and Light-emitting diode will flash, thereby discharging the capacitor. The cycle then repeats ad infinitum.
Assembling the flasher
For clarity, we will assemble it using a hinged installation. We solder the capacitors with a common minus to each other.
Soldering the contacts LEDs according to polarity.
Now transistors come into play.
Solder the resistors.
Let's make a ring of copper wire and use it to connect all the resistors together.
Solder a diode into the place where the capacitors are soldered.
This completes the flasher. All that remains is to solder the power wires from the power plug.
Examination
Be especially careful not to touch live contacts after the circuit is connected to the network!
The circuit does not require adjustment and, if the parts are in good condition, works immediately.
We serve food. The lights begin to flash periodically in a chaotic manner.
A very beautiful effect, which you can check out firsthand in the video below.
It is not necessary to use a scheme consisting of three blocks. Their number can be either reduced to one or increased to infinity. It's up to you to decide.
