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Areous Ahmadtj
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 · JosNigeria
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Hello

i didn’t see any thing here

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engineering student (Project Leader)
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will be pleased to welcome investors and thanks . :)

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student
 · SaharanpurIndia
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bro, why the relay part is not completed yet… do you want any help in connecting relays?

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engineering student (Project Leader)
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actually yes and im having my midterm exams so im free only after 10th of march till then i will see what other people have for this projects. And you could tell me about connecting relays to the output of decoder ic and ac signal. actually i know about the terminals but like in ic’s we have one small dot and that signifies pin 1, here also there is some dot is there and the coil terminals. You could help me telling where to connect what and what does that dot signify. :)

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No that dot not for any information. it is not there for any sign.

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Abhi Verma
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ROBOToTHON 2017 Mentor, Electronics Engineer
 · DelhiIndia
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relays don’t have that dot. there are few terms in case of relays. i.e. coil pins, NO pin, NC pin, COM pin.
coil pins are used to power up the relay. usually the have a operating voltage 5V, 12V,24V etc.
NO pin is normally open pin. which mean when relay coil is not powered COM pin will not be connected to NO pin. when coil is powered NO will be connected to COM.
NC pin is normally connected pin. which mean when relay coil is not powered COM pin will be connected to NC pin. when coil is powered NC will not be connected to COM.

the pin between two pins on left side is COM pin. others two are coil pins.
on right side are NO and NC pins.

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engineering student (Project Leader)
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thank you so much Abhi Verma . It was such a simplified description of a relay.!

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