Uploaded February 2024 | Updated September 2026, 1 week ago

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Explaining the 555 timer/oscillator chip and what each pin does. Example oscillator circuits for beginners - an LED blinker, changing the frequency and the duty cycle. A beeper and a 2-tone siren with the 555 chip, adjusting the frequency using a potentiometer. Simple schematics easy to understand for newbies.

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