MrDEB
Well-Known Member
Planning on constructing a simple tempeture module that measures 4 refergerator temps.
wanting to add some spice to the mix. if say ref 1 temp is too cold a green LED flashes. If too warm, a red LED flashes.
thinking there's got to be a better way than using two ports for each ref. not that I don't have the room but ??
thinking an NPN and a PNP transistor connected to one port. port goes low or high thus lighting desired LED.
sounds like too much trouble, just use 8 ports?
even wondering if chariliplexing would work??
wanting to add some spice to the mix. if say ref 1 temp is too cold a green LED flashes. If too warm, a red LED flashes.
thinking there's got to be a better way than using two ports for each ref. not that I don't have the room but ??
thinking an NPN and a PNP transistor connected to one port. port goes low or high thus lighting desired LED.
sounds like too much trouble, just use 8 ports?
even wondering if chariliplexing would work??