Checked each point in the side rails when the battery is connected to it using a multimeter. They aren't broken
Could it be a bad jumper lead?
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Yeah maybe. One end of jumper lead connected to side rails have a HIGH voltage(multimeter reading). The other end of jumper lead connected to breadboard points from the side rails have 0V reading
OP- DO NOT post screenshots. No one will look at them.
You do realize that in your low-resolution photo you have both wires plugged into GND?
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Thanks for the suggestion.
Both wires aren't connected to GND. The red wire is connected to 5V that's next to GND
To clear the fuss, I am able to measure 5V across pin 13 and GND(using Multimeter). So there's output current from Arduino. However, there is a 0V potential difference across the legs of the LED and even across jumper wires connected onto the breadboard.
The breadboard works good and is tested though. So clearly there ain't any issues with the breadboard.
What may have then gone wrong, guys?
It's hard to see from a low-resolution photo. But the grey lead is on ground, not 13.
If the red is on +5 and the grey on GND, and if the LED is oriented correctly, the LED should be on all the time. Try turning the LED around. Your photo if not clear, but it looks like the flat (Cathode) is not the lead going to ground.
Thanks man, tried switching led terminals several times. But the point is even if LED terminals are wrong, I am supposed to get a negative voltage reading. However, thatās isnāt the case here. the voltage reading is 0 across LED and also across the jumper pins over the breadboard.
Usual debugging stuff, simplify. Forget the code, light the LED from 5V and ground. If that doesn't work, swap out the jumper wires. That's not it? Take the breadboard out of the equation.
Oh, and light the LED again with the battery to verify that your prior test didn't blow it.
Just tried the above steps. The multimeter read 5V for the wires on one end of Arduino. However, on the other end(where LED is connected), it read 0V. Thus, LED didn't turn ON as usal
Is it to be concluded as a problem with the connecting wires!?
Maybe. Try testing connectivity in that wire with your meter.
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