Hello, I'm newbie in Arduino Uno and my questions maybe does not make any sense but I'm struggeling with using button to switch my LED Cube off/on. Since I'm not using pins for 5V and my PWM pins are full I don't know how to use it and connect it. :o
Also, I wish I would know the anwer of: if I connect my powerbank to USB port everything works just fine although if I connect 9V battery to external power supply (DC jack) after some time (half of hour) the one site of cube get stuck (just 3leds are lighted up, no more effects). Why is that?
Here is the scheme:
Please don't hate me and thank you in advance for your help !