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IoTIoT
IntroductionIntroduction
toto
ElectronicsElectronics
Marian HackMan Marinov
Chief System Architect of SiteGround.com
<mm@1h.com>
Who am I?Who am I?
DisclaimerDisclaimer
➢ I'm not an Electrical Engineer
➢ I don't know the laws of Ohm and Kirchhoff
BooksBooks
What we will talk about?What we will talk about?
➢ Switches
➢ Relays
➢ Transistors
➢ Diodes
➢ Fuses
➢ Capacitors
Electric circuit schemeElectric circuit scheme
Real world electronicsReal world electronics
➢ Your lights
Real world electronicsReal world electronics
➢ Your lights
➢ Your TV
Real world electronicsReal world electronics
➢ Your lights
➢ Your TV
➢ Your audio system
Real world electronicsReal world electronics
➢ Your lights
➢ Your TV
➢ Your audio system
➢ Electric cooking stove
Real world electronicsReal world electronics
➢ Your lights
➢ Your TV
➢ Your audio system
➢ Electric cooking stove
➢ Water/Heating system
SwitchesSwitches
Single Throw Switch(ST)Double Throw Switch(DT)
SwitchesSwitches
Single Throw Switch(ST)
SwitchesSwitches
Double Throw Switch(DT)
SwitchesSwitches
➢ Single Throw, Single Pole (STSP)
➢ Double Throw, Single Pole (DTSP)
➢ Single Throw, Double Pole (STDP)
➢ Double Throw, Double Pole (DTDP)
➢ Throw == Terminal
STDP DTDP
RelaysRelays
➢ Separate the control circuit from the actual
device
RelaysRelays
➢ Separate the control circuit from the actual
device
RelaysRelays
RelaysRelays
ContactorsContactors
➢ Used for high power electronics like
➢ ovens
➢ electric sockets
➢ engines
PitfallsPitfalls
➢ Relays and contactors share a few problems
➢ Reverse voltage
➢ Sparks causing
EMI/EMP
Arduino and relays?Arduino and relays?
TransistorsTransistors
TransistorsTransistors
N Never
P Points
N iN
N Negative
P Positive
N Negative
P Points
N iN
P Permanently
P Positive
N Negative
P Positive
TransistorsTransistors
➢ Bipolar
➢ Junction FET
➢ MOSFET (a.k.a IGBT)
➢ Unijunction FET
Arduino - transistorArduino - transistor
Transistors vs. RelaysTransistors vs. Relays
TransistorTransistor RelayRelay
Long-term reliabilityLong-term reliability ExcellentExcellent LimitedLimited
Configurable for DP and/or DT switchingConfigurable for DP and/or DT switching NoNo YesYes
Ability to switch large currentsAbility to switch large currents LimitedLimited GoodGood
Able to switch ACAble to switch AC Usually notUsually not YesYes
Can be triggered by ACCan be triggered by AC Usually notUsually not OptionalOptional
Suitability for miniaturizationSuitability for miniaturization ExcellentExcellent Very limitedVery limited
Sensitive to heatSensitive to heat HighHigh ModerateModerate
Ability to switch at high speedAbility to switch at high speed ExcellentExcellent LimitedLimited
Price advantage for low-voltage low-currentPrice advantage for low-voltage low-current YesYes NoNo
Price advantage for high-voltage high-currentPrice advantage for high-voltage high-current NoNo YesYes
Current leakage when “off”Current leakage when “off” YesYes NoNo
DiodesDiodes
DiodesDiodes
Arduino with IR diodeArduino with IR diode
FusesFuses
CapacitorsCapacitors
➢ Fast rechargeable batteries
➢ Surge protection
➢ Can be used as timers
➢ Can be used as hold the key
Ohm's Law
The things
you are
AFRAID
Io t   introduction to electronics
Io t   introduction to electronics
Marian HackMan Marinov <mm@1h.com>
hackman @ irc.freenode.net
https://github.com/hackman

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