So I’m quite confused with what’s happening here, my LED bar is dimming but lights up fully when I touch the bed of my breadboard… the video explains it best. It will also stop dimming if I put my finger on the shift register.
Videos:
https://photos.app.goo.gl/yx85PCBvYJxE5Y1x7
https://photos.app.goo.gl/msYmNL43oxzq9r3G9
I’d like to know what is happening, is there some electrical term for it? Is it because the power cable for the board doesn’t have a ground? Any ideas what I can test?
Details and testing:
I’m running a 3.3V to the shift register power with 165 ohms in series so 20 mA. The shift register inputs have the 3.3V digital output signals with 330 ohms in series so 40 mA. I’ve played with the current by changing the resisters, I’ve tried a different breadboard, different power supplies (usb and barrel), and a few other things… I’m stumped
Products:
Board - https://www.sparkfun.com/products/13321
Shift Register - https://www.sparkfun.com/products/13699
LED bar - https://www.sparkfun.com/products/9936
Circuit pictures:
https://photos.app.goo.gl/rCXDusvdP1HCJJcW6
I can post the code if needed but this seems like an electrical issue, not a code issue