Hello everyone. I'm rather new to this, and I've never seen a few parts on this schematic. I searched through sparkfuns guide on schematic symbols, but couldn't find what these few were. I pointed them out with black arrows, but I'll also describe part of what I'm talking about. I haven't been able to figure out why some ends are red while other are highlighted in green. The other pieces I can't seem to find. I assume that the red is supposed to connect with red, except that there are multiples and they don't have matching numbers.

Much appreciated,
J

 

https://www.google.is/url?sa=t&sour...ghHMAo&usg=AFQjCNH8RCevxqDepNRSypCNhvs5pOaIXQ

It's an optocoupler.

 

4N35 = Optocoupler

The other one is possibly a relay coil. Would that make sense?

 

https://www.google.is/url?sa=t&sour...ghHMAo&usg=AFQjCNH8RCevxqDepNRSypCNhvs5pOaIXQ

It's an optocoupler.

Thank you very much for your quick reply! I really appreciate it.

 

4N35 = Optocoupler

The other one is possibly a relay coil. Would that make sense?

Thank you for replying so fast! Yes, I believe it would. Do you happen to know why certain wires are marked red and others green?

 

Oh! I think I have it. They're red because they don't connect to anything.

 

Hello everyone. I'm rather new to this, and I've never seen a few parts on this schematic.
Much appreciated,
J

U generally refers to an IC which can be looked up with a search, the Q usually refers to an inductor, but in this case as mentioned, appears to be a relay coil where it would be the custom to label it R(#) normally.
Edit: Make that RL =relay.
Max.

 

Do you happen to know why certain wires are marked red and others green?

Color coding schematics is generally pointless.

Do us a favor next time and print those fritzing in black and white before posting. Anyone who can read a schematic can identify terminals that are connected and those that aren't.

 

Color coding schematics is generally pointless.

Do us a favor next time and print those fritzing in black and white before posting. Anyone who can read a schematic can identify terminals that are connected and those that aren't.

I actually found this on a project website and I was trying to figure out if it meant anything. This isn't my schematic.

 

This isn't my schematic.

You can still modify the image in a photo editor or print it as black and white.

 

You can still modify the image in a photo editor or print it as black and white.
View attachment 132016

Fair enough, I needed to know if the green and red held any significance though. Thank you for informing me though that they don't, that'll be good to know in the future. I'm a first year student and I'm still learning.

 

U generally refers to an IC which can be looked up with a search, the Q usually refers to an inductor, but in this case as mentioned, appears to be a relay coil where it would be the custom to label it R(#) normally.
Edit: Make that RL =relay.
Max.

Thank you! In the far right corner there's a D1
1N4007
I looked up the 1N4007 and found that it's a rectifier diode. Does the D normally stand for something like the U and Q do?

Thanks,
J

 

Thank you! In the far right corner there's a D1
1N4007
I looked up the 1N4007 and found that it's a rectifier diode. Does the D normally stand for something like the U and Q do?

Thanks,
J

As in Sesame Street, D is for Diode.
Max.

 

As in Sesame Street, D is for Diode.
Max.

Ah, yes. It would help if I would use some common sense, eh? Thanks again

 

Ah, yes. It would help if I would use some common sense, eh? Thanks again

Don't beat yourself up to much I mean U and Q weren't very obvious were they.

 

The "inductor" could be a solenoid, with an iron core that pulls in when the coil is energised.
The other thing it could be is a permanent magnet attached to the coil to prevent saturation, the double arrows may indicate the north/south pole orientation, but I'm more inclined to think it is a solenoid like an electro-mechanical door lock etc.

 

Does the D normally stand for something like the U and Q do?

In older schematics, CR was used instead of D for diodes.

IC is sometimes used instead of U for Integrated Circuits.

T is sometimes used for transistors instead of Q.

Sometimes LEDs are designated as D, sometimes it's LED (e.g. LED1).

 

The "inductor" could be a solenoid, with an iron core that pulls in when the coil is energised.
The other thing it could be is a permanent magnet attached to the coil to prevent saturation, the double arrows may indicate the north/south pole orientation, but I'm more inclined to think it is a solenoid like an electro-mechanical door lock etc.

Yes, you're right. There is a solenoid in the design. I found a finished product, and I'll link it so that everyone can

The "inductor" could be a solenoid, with an iron core that pulls in when the coil is energised.
The other thing it could be is a permanent magnet attached to the coil to prevent saturation, the double arrows may indicate the north/south pole orientation, but I'm more inclined to think it is a solenoid like an electro-mechanical door lock etc.

Yes, there is supposed to be a solenoid in the design so I think you're right. I found an image of the finished product that I'm going to link so everyone can see more clearly. Thank you!

The "inductor" could be a solenoid, with an iron core that pulls in when the coil is energised.
The other thing it could be is a permanent magnet attached to the coil to prevent saturation, the double arrows may indicate the north/south pole orientation, but I'm more inclined to think it is a solenoid like an electro-mechanical door lock etc.

Yes, I'm inclined to agree with you since there is supposed to be a solenoid somewhere in there. I'm going to link an image of a finished product I found so everyone can see more clearly. Thank you! Why would there be a diode connected to both terminals of the solenoid?

Regards,
J

 

Thank you all for your help. I just realized I left out something that could definitely help. Here's a link to the original project.
https://www.hackster.io/Advanced/punch-activated-arm-flamethrowers-real-firebending-95bb80

Regards,
J

 

Accidentally posted that multiple times. The page kept refreshing and not showing them. My apologies