In this 220 V blinking LED circuit, we powered a 3-volt DC LED directly with 220 V AC. This circuit can be used in special places to identify the main voltages. The capacitor is charged by a 470 k resistor and diode.
The capacitor is charged by a diode IN4007 and a 470k resistor. The capacitor voltages are 35v. When capacitor charging reaches 35 volts, the disc breakpoint is reached (the diac can block a maximum of 35v).
DIAC stands for Diode for AC It is a two-terminal device. It is a combination of parallel semiconductor layers that activates current only in one direction. It consists of two terminals, namely MT1 and MT2. A DIAC is used, which is basically equivalent to two diodes connected in reverse. Whenever the voltage across the breakdown over-voltage, it starts conducting and remains in a conduction state until the current flows through it.
The above symbol clearly shows that a DIAC is a combination of two diodes.
Circuit diagram
Components Required
- Diac DB3
- Diode IN4007
- 470k resistor
- 1k resistor
- LED
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