03/07/2025 10:26 am
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Hi all
New here ...so please bear with, as I find the ropes , First let me explain. Quite a bit on the distant side of yoof. Am a mechanical engineer who has spent considerable time playing with motorcycles, So im familiar with the " basics", Now that computers and such simulation software has become more available ,,,I decided to "upgrade", and have been playing with circuits. However, I think Im into this a bit deep, I modelled a LED lighting circuit using tinkercad, things flashed ... but didnt work, Then I noticed there were many "similar circuits " on line.... Heres, the question; Are these "ai generated circuits?" are the "use-able? and if so what am I doing wrong,,, are these value for the components valid? Ive never used a 555 chip before and while I understand how it works ,,,ive never actually used on,,, Thank you in advance ,,,any help is gratefully received
Kind regards
Stephen
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04/07/2025 5:57 am
Hi!
Welcome to the world of Electronics 🙂
Here are the answers to all of your questions:
1. It's not possible to generate circuits using AI(at least as of now).
2. Most of such circuits available online are copied from somewhere and then designed again. You will find a lot of circuits similar to each other online.
3. Can you trust these circuits? In most of the cases they are correct but it's better to simulate them first.
4. In you particular case, the LED chaser circuit that you shared is correct. I checked from beginning to end. Seems okay. Although, if you have a stable 5 V power supply, you don't need the regulating circuit(L7805 one).
Did you simulate the exact same circuit on TinkerCad? Can you share the design file here so that I can take a look.
basilwatson Topic starter
06/07/2025 1:10 am
@ankunegi
Thank you
Really appreciative of the reply. Interesting about "Ai" ,,,i asked it many times and the circuits I got back even I could see were Junk
So here is the Tinkercad link ... No bread board, just in desperation , randomly joining things together to see if I get a response. https://www.tinkercad.com/things/8KM0gtZ2SP9-sequential-led-circuit-?sharecode=bBxZuQtCi6Ij17lLwW9QNU6HdWHhWPO3mI3HIlo7cOU I hope this link works .... Now bass usual for me ,,, I have probably , A; over looked the obvious ...B; done something stupid, Im looking forward to finding out .... My guess is Ive got the pins round the wrong way....
Thanks in advance
Stephen
Admin 07/07/2025 6:15 am
Hi! I checked the circuit on TinkerCad. There were some mistakes, like wrong capacitor connection and value. Here's the edited one:
A couple of points worth mentioning here:
1. On running the simulation, TinkerCad shows too much current drawn from the IC and may damage it.
2. This is true if you are running it continuously. In this case, all LEDs are ON at the same time for a very small duration, so it somehow works.
3. Still, not a good idea in the long run.
I will suggest:
1. Use a 220-ohm resistor instead of 100. And connect two LEDs per pin to only one resistor. Meaning a total of 8 resistors for an 8-pin. This will reduce the overall current draw from the IC and per pin as well.
2. Better use 330 ohm..but not that it will reduce the brightness of the LEDs further.
basilwatson Topic starter
07/07/2025 10:23 pm
This post was modified 7 months ago by basilwatson
@ankunegi Thank you that was kind of you, I had connected up the capacitor and tinker cad said "wrong way round " so I left them ,,, not knowing what I was doing ... Another "similar" circuit I have suggests 440 ohm resistors I will use your suggestion. Once I know the circuit works ..I have a safe point to retreat back to Once again thank you for taking the time to look at the tinkercad sim kind regards Stephen
