555 Astable Oscillator (Blinker)
An NE555 in astable mode self-oscillates into a square wave via two resistors and a capacitor; the RC values set the blink period.
Timers & OscillatorsIntermediate
An NE555 in astable mode self-oscillates into a square wave via two resistors and a capacitor; the RC values set the blink period.