What is a Pull-Down Resistor?A pull-down resistor is used in electronic logic circuits to ensure a known state for a signal. It is usually used in combination with transistors and switches to ensure the voltage between ground and Vcc is actively controlled when the switch is open (similar to a pull-up resistor).This can sound confusing at first, so let’s go into an example.A digital circuit has three input logic states; High (1), Low (0), and floating (undefined). But the digital circuit only op