Hi Dave – sorry for the long pause in response – I was building a table and heated work surface. I have used the resistor circuit using a 15 ohm resistor and a 10 ohm cross over to the ground I get 6.4 volts from the signal pin for the ramps. I need a resistor combination that will cut the voltage to less than 5 volts but don’t know enough to change the values.
I have tried several combinations and always get around 6.4 volts which is too much. I don’t understand the basic concept of a resistor bridge and need help to solve it…..