This is a design for very simple lamp flasher circuit. The circuit is use only three components (a capacitor, relay and one resistor) other than the lamp. This is the figure of the circuit.
The working of the circuit is very straight forward. When the power is switched ON, the capacitor C1 will charge through the resistor. When the voltage across the capacitor is sufficient, the relay switches ON and the lamp connected via the normally open contact of the relay glows. The relay remains energized until the capacitor discharges and then the lamp extinguishes. The charging and discharging cycle of the capacitor gives a flashing effect to the lamp. The relay L1 can be a 12V SPDT relay. The lamp L2 can be a 12V, 5W lamp. The frequency of flashing can be varied by changing the value of C1 and R1.
The working of the circuit is very straight forward. When the power is switched ON, the capacitor C1 will charge through the resistor. When the voltage across the capacitor is sufficient, the relay switches ON and the lamp connected via the normally open contact of the relay glows. The relay remains energized until the capacitor discharges and then the lamp extinguishes. The charging and discharging cycle of the capacitor gives a flashing effect to the lamp. The relay L1 can be a 12V SPDT relay. The lamp L2 can be a 12V, 5W lamp. The frequency of flashing can be varied by changing the value of C1 and R1.
a nice flasher!! can we add 4-bulbs for this circuit? what would be the modification?
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