220V AC Powered Blinking LED


I needed a pulsating
light for a certain signaling. Voltage was 230V. So I decided to make a
simple circuit, consisted of a LED diode, two
capacitors, two resistors, a diac and a diode. Activity of the circuit
is extraordinarily simple. The capacitor charges by the diode and the
resistor. When the voltage on the capacitor achieves 30V the diac
“releases” the electrical tension and the capacitor empties thorough the
diac, LED blinks. Time base is dependent from
the capacitor and the resistor, which is in series with diode 1N4007.
Capacitor must be at least for 40V.

The pulsing LED

The pulsing LED

Schematic of pulsing LED circuit

Schematic of pulsing LED circuit

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