J Jake 123 New member Mar 14, 2023 #1 Built two of these and one has a high pitched whistle in the background when on and the other one passes a clean signal but does nothing when engaged, the led does not come on (I've checked it's the right way round)
Built two of these and one has a high pitched whistle in the background when on and the other one passes a clean signal but does nothing when engaged, the led does not come on (I've checked it's the right way round)
