I was having trouble with inputs and outputs on a new UNO connected to an 8 relay board, so I decided to create a simple sketch to test digital 0-13 as outputs, and strange outputs occur after the first run on the For loop, and then instead of just repeating, it does some crazy outputs (sometimes se…

uno output erratic even with simple for loop output test

Topic		Replies	Views
Freeze in looping program, something wrong? IDE 1.x	28	9625	May 5, 2021
Wacky for loop behaviour Programming	5	1463	May 5, 2021
Arduino Uno no OUTPUT on digital pins IDE 1.x	4	3030	May 5, 2021
Unwanted shut down of outputs. Programming	28	10745	May 5, 2021
pin 13 led on all the time Motors, Mechanics, Power and CNC	5	1072	May 6, 2021