Completely new to Arduino and all things prototyping, I have the book “Make: Getting Started with Arduino” and an uno r3
One of the projects in the book is to make a simple LED operate via using pin 7 and digitalRead
I had this working yesterday but have come back to it today and recoded it, but instead of an off LED connected to any of the digital outputs, Im getting a half lit LED until I trigger pin 7 then it goes full brightness, sometimes the led remains on after the trigger is removed sometimes it goes back to half and sometimes it goes off but then it flickers, this even happens to the on board pin 13 led.
Have I blown something? Multimeter is getting .8v/.9v on all un-configured digital pins at all times and upto 2.5v on the LED pin even though it is not triggered.