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)
Blinking LED Controller Easy To Install Flash Strobe Controller for Fog Lights for LED Headlights for Small Lights | AliExpress
How hard can it be to make a simple LED blinking circuit? Conor's stupid questions to self, Episode 5892 · Cross Dominant
ATtiny85 microcontroller tutorials, Part 3: Building LED blinking application using ATtiny85