Electronic Basics #26: 555 Timer IC
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Electronic Basics #25: Servos and how to use them
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Using the 555 Timer
30:13
How a 555 Works as a Timer.
7:31
Electronic Basics #31: Schottky Diode & Zener Diode
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6 awesome application of 555-timers in circuits
28:56
EEVblog #392 - 555 LED PWM Hack
10:29
555 Timer Modes Explained - The Learning Circuit
1:02:29