First off, thanks in advance you guys were awesome on code help and apologies if this is posted in the wrong area.
What I'm trying to do:
Use a transistor as a relay. The DPST kills the whole circuit / LED goes on when circuit is live. This is 1 of 6 that connect to the arduino, just drew 1 other 5 are on the same board / identical but different pins.
0) Disregard Ohms / parts numbers haven't figured out correct numbers yet 1) Can all grounds connect to the same point? 2) Worried about voltage drop on the LED's if 6 are coming off the same 5v or how to deal with some being on / off. Basically not sure on that part. 3) Edit, if LED's are backwards etc will flip that when I put it in. Same with transistor.