I wired everything exactly as you showed in the tutorial but I have an issue. The pot only slightly controls the fan. If it were to have numbers 1 thru 10.....1 through 8 is off and the 9 to 10 gives basically 2 speeds. I have 12v .3a fans. 100k ohm pots. Used the same wire....wired it the same way as shown....the power supply is 12v 1.0a.
Where did I go wrong? Did I go wrong? I would like to have full range of speed control if possible.
By the way.. im new here and have limited to no knowledge of electronics.