... link between low power digital

electronics and high (a)   devices

relays allow digital circuits and .....

relays allow digital circuits and

digital microcontrollers to (a)   high

powered devices on and off in the

this main component here this is the relay

and a relay basically consists of a (a)   which

relay basically consists of a coil which

builds up a magnetic (a)   when current

a relay it actually (a)   a small

magnetic field which will actually

magnetic field which will actually

magnetically (a)   a switch into the

closed position to allow current to flow

two different circuits and the only

thing between them is this relay they're

actually both electrically (a)  

meaning that this side of the circuit is

not electrically (a)   to this side

of the circuit so I have a DC power

and on this side of the circuit I have

an AC power (a)   which could be high

power it could be the full AC mains

voltage it could be 120 or 240 volts and

it's connected to this (a)   so what

happens is by switching on this circuit

switch on the low powered side which is

a completely (a)   circuit you can

see the electrons do not flow

because there is now a magnetic force

pulling this switch (a)   this closed

position so it's allowed this AC circuit

to run this lamp and the lump is

(a)   because it is AC and it is

running in slow motion in real life that

ave a closer look at that again focus

on this (a)   of the screen and on the

low powered side I'm going to flip the

switch and watch what happens the switch

was (a)   attracted towards the

coil but both of these circuits maintain

coil but both of these circuits maintain

complete (a)   they are two separate

circuits now the reason why relays are

which run at a very low power to control

high-powered electronic devices such as

motors heavy industrial (a)   and

many other things basically allowing

computers and microcontrollers to

(a)   with these much larger devices

will show in the future where I used an

Arduino which is a low powered device

which runs off of (a)   volts I used an