Amazon.com: EDGELEC 100pcs 5mm White Blinking LED Diodes 1.5Hz Flash (Single Color Flashing) Clear Round Lens 29mm Lead DC 3V Blink Bulb Lamp Light Emitting Diode +100pcs Resistors (430ohm for DC 6-12V)
Adjustable Flashing/Blinking LED Circuit using 555 Timer IC
Blinking LED Circuit with Schematics and Explanation