How to Control Signal Strength with the Redstone Resistor and Inverter
Reducing Signal Strength
Place a Redstone Resistor in line with your redstone dust. Feed the incoming signal into one side and take the output from the other. The Resistor lowers the signal strength passing through it, which is useful when a full-strength signal would trigger a device too strongly or when you want to limit how far a pulse travels. Adjust the Resistor until the downstream device, such as an Analog Redstone Lamp, reacts at the brightness you want.
Inverting a Signal
Place a Redstone Inverter on the line. It outputs the opposite of its input: a powered input produces no output, and an unpowered input produces a full output. Use it to turn a button press into a constant signal that drops when pressed, or to make a Redstone Display show the inverse state of a Redstone Counter.
Combining Both
Run your source into a Redstone Resistor first, then into a Redstone Inverter, then into the target block. This lets you both weaken and flip the signal before it arrives. If you need to merge two lines, route them through a Redstone Adder and then into the Resistor so the combined strength is what gets reduced.
Routing Visibly
Use Redstone Glass for any dust path you want to see through. It carries redstone like normal dust but stays transparent, so you can trace the signal from the Resistor and Inverter to the Analog Redstone Lamp or Redstone Display without hiding the wiring behind solid blocks.