Better 555 Duty Cycle Control (PWM).
28:38
Regulador PWM para lamparas LEDs o motores DC (Clase 77.2)
30:13
How a 555 Works as a Timer.
14:48
Adjust the Duty Cycle of the 555 Timer without Changing the Frequency
22:35
Impedance Explained.
23:20
Make: Electronics Book Experiment 17 - Building an alarm system
16:57
555 Chip Explained - LED Blinker, Buzzer, Siren...
34:13
A bit of Op-Amp History and Applications
18:59