How Electromechanical Relays Work - DC to Daylight
Автор: element14 presents
Загружено: 2022-04-06
Просмотров: 8355
In this theory-based episode, we take a look at the evolution of the relay, how it changed telegraphy, and how to actuate a relay safely from a low-current source like a microcontroller. The method Derek typically uses to select the proper base resistor for a given BJT transistor is presented, as well as why you always see a freewheel protection diode across the relay coil; the resulting waveform, with and without protection diode, are viewed on the oscilloscope. https://bit.ly/37dbe0p
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#0:00 Welcome to DC to Daylight
#1:06 Relays
#2:53 Telegraph Relay
#5:36 Drive a Relay from a Microcontroller
#9:16 Circuit
#10:33 Scope
#12:17 Give Your Feedback
#relays #electromechanical #electromagnet #transistor
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