Hello fellas, since this is my first post here, i’m greeting you all !
Now onto the problem:
I built a LM3915 (Waiting for LM3916 to arrive) VU Meter based on Sparkfun’s tutorial https://learn.sparkfun.com/tutorials/do … okup-guide.
Problem is, when i plug the power, only the last LED (LED 10) lights up and the LED9 kinda flickers. If i pull the Pin 9 of the LM3915 to HIGH (+5v) then all of the LED’s are lit up. I’m providing input to Pin 5 (SIGNAL) via 3.5mm audio jack. So i connected GND of the 3.5mm jack to the GND in the circuit, and tried the both the TIP of the jack and the RING. Nothing, always the same results.
I’ve Google’d a lot on this, and found a couple of guys with the same problem, but no solution. So if there is anyone that might know whats up with this, it would be much appreciated.
Schematic:
