#1. Success and fails to turn the light on LED

My very first experience to play with a breadboard and LED!

Sometimes LED is lighten up, sometimes it did not work, but haven’t found the reason. I thought I connected between power and ground with wired properly, but guess there are some mistakes.


My first attempt was failed. Anybody please explain the reason.



I changed the arrangement of elements and it worked successfully.


I made another shape of circuit.



In the same circuit, I added one more LED next to the previous one, but…

I should not have put it just next to the first one? Current can not flow between LEDs directly from one another? I will connect with a wire between two of them. We’ll see.



3 thoughts on “#1. Success and fails to turn the light on LED”

  1. Hey Jinhee, congratulations on building your first circuit! The issues you are having are about getting a handle on how the breadboard holes are actually connected, so it is normal! It might take a bit of practice. We can discuss this more in person. Also, using a multimeter to check for continuity or voltage flowing through will be very helpful for troubleshooting. Good luck!

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