Alternating Flashing LED's / Lights - One LED ON, One OFF

This small and simple electronic circuit behaves like the flash lights that you see at dangerous corners where your driving or at a railroad. i.e. it has two LED's / lights that flashes in an alternating fashion. You can use any color LED's e.g. red LED's, green, LED's, yellow, orange, etc.

The circuit has only 6 components, and that's including the 2 LED's. The main part of the circuit is the venerable 555 timer IC. Is there any timing circuit that doesn't use the 555?

• 1 x 555 Timer IC
• 1 x 33k Resistor
• 1 x 120k Resistor
• 1 x 1 µF (micro-Farad) Capacitor
• 2 x LED

Anyway... this is perfect if you want to experiment with the 555 timer, build a warning signal for a model railroad, or, well.... just about anything else that might required alternating flashing LED's

Happy soldering!!!