220V AC Powered Blinking LED
Posted Apr 18, 2013 at 12:35 pm
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
Schematic of pulsing LED circuit