How Does a Pull-Up Resistor Work?
A resistor is a portion of an electronic device that lowers the voltage between its two terminals. The voltage drop is intended to oppose, or “resist,” an electrical current. The drop in voltage is inversely proportional to the amount of current that is being opposed. Resistors are part of most electronic equipment, and are used in electromagnetic circuits as well. Resistors are composed of several elements and can be in many different forms, including wire made of a nickel and chrome alloy. They are part of most types of circuits, including printed and hybrid circuits. The size of the resistor must be taken into account when designing a circuit because a smaller resistor can overheat from power dissipation problems. There are several different types of resistors, including pull-up resistors and pull-down resistors. Pull-up resistors are resistors that are used in logic circuits. Pull-up resistors work to make sure that logic system inputs remain at the correct levels in the event that
