Trent W said:Actually i went ahead and wired the entire thing with both fans and the relay and the first led when both fans are running is out but the second one is on then when the 210f stat is triggered then the led comes on. So wjhen both are running pin one voltage is at 1.9vdc
At half speed run in series led one runs trough 2 shunts.... maybe making them 3feet long? Also what would happen if you increased the resistor rating from the led to a higher ohm? Wouldnt that drop the voltage? i can post pin voltages but when both fans are running at low speed the voltsges are really close to what you said
Thanks for the updates,Trent.
The resistor(s) in series with the LED(s) are "current limiting" devices meant to protect the LED(s) from damage. While it is true they dump some voltage it's so little that the overall voltage level across the devices is not significantly altered.
Very interesting how the circuit is responding. Might be able to salvage this after all. I'll play some more with the existing breadboard circuit, taking into your account of how it's reacting and see if I can get where we need to be, i.e., LEDs OUT when the fans are functioning properly.