Solve Black Box Circuits w/ Switch & w/o Switch

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SUMMARY

This discussion focuses on identifying the circuits of black box setups involving a 6V power supply and light bulbs. The user sought assistance in understanding the circuit diagrams, specifically the notation used for the light bulbs, which is represented by a circle with an 'x'. Participants clarified that this symbol is commonly used in the UK and Australia for incandescent lamps. Ultimately, the user successfully resolved their issue with the help of community insights.

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  • Understanding of basic circuit components, including light bulbs and switches.
  • Familiarity with circuit diagram notation, particularly symbols for lamps.
  • Knowledge of voltage sources, specifically 6V power supplies.
  • Awareness of different regional standards in electronic symbols, such as UK and US conventions.
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  • Research the use of circuit symbols in various regions, focusing on UK and US standards.
  • Explore the principles of circuit design involving switches and light bulbs.
  • Learn about the functionality of incandescent lamps in circuit applications.
  • Investigate resources on black box circuit analysis techniques.
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Electronics enthusiasts, students learning circuit design, educators teaching electrical engineering concepts, and hobbyists experimenting with circuit setups.

Physdiot
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Hi

I'm experimenting with some black boxes and I'm trying to figure out what's their circuit. I can't seem to find what these two circuits could be.. Could someone please help me out?

The purple crosses mark which ports are connected to the power source (6V). The yellow marks show how hard every lamp is burning.

Circuit 1 w/ switch:
circuit-1.png

The second setup shows the lamps when the switch is pushed.

Circuit 2 without switch:
circuit-2.png


The purpose is to get something like this: (this is from another black box I tried)
example.png


If anyone could help me with this, I'd be glad! Thanks!
 

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So what is the "Green, Red, Blue"? Are those lights? is that the circuit diagram? I'm not familiar with that notation.
 
@scottdave They refer to the colors of the ports where you can plug the wires into. The wires are connected to a power supply (6V). The purpose is to get a circuit that you could rebuild the black box with.
 
Is this a problem you made up yourself?

There is not enough information for us to understand what you mean or what you are trying to accomplish.
 
I have attached my suggested circuits.
upload_2019-2-16_21-3-15.png
 

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OK, the circle with an x is a light bulb. I hadn't seen that used before.
 
I think both circuits that you have drawn would produce the results that you observed.
 
scottdave said:
OK, the circle with an x is a light bulb. I hadn't seen that used before.
The Wiki article shows it as an incandescent lamp used as an indicator. It is taught to the kids at school in the UK. I don't like the symbol myself.
https://en.wikipedia.org/wiki/Electronic_symbol
 
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And in the US, the Ladder Diagram used in industrial control schematics shows this for a lamp (although the Switch symbol shown here is rarely seen):

04006.png


from: https://www.allaboutcircuits.com/textbook/digital/chpt-6/ladder-diagrams/
 

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  • #11
scottdave said:
OK, the circle with an x is a light bulb. I hadn't seen that used before.
tech99 said:
The Wiki article shows it as an incandescent lamp used as an indicator. It is taught to the kids at school in the UK.

Yeah, pretty standard here in Australia and New Zealand as well :smile:
 
  • #13
Thank you very much all for your replies! Thanks to you guys I was able to solve my problem!
 
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