A prototype for the latest Star Ring. Q1, Q2, and Q3 use this N-channel MOSFET. The circuit runs from a 3V battery. When one of the transistors is turned on, the six red/green LEDs in the associated row can be turned on or off using six microcontroller outputs. At least that’s the theory. I built this, and it works – barely. The LEDs are extremely dim. Why?
Hint: what gate voltage is needed to turn on the transistors?
I’m not sure if there’s any way I can patch this, without having to redesign a new board.