Diode Polarity & Symbolsĭiodes are polarized components, meaning they have a very specific orientation that needs to be connected in a circuit to work correctly. It’s either closed (on) and letting current flow through it, or open (off), and no current can flow through. While these two terms might seem overly complicated, think of a diode as a switch. Reverse-Biased: When you slip a battery into a circuit backward, your diode will block any current from flowing, which is called a reverse-biased state.Īn easy way to visualize the difference between forward-biased and reverse-biased states of a diode in a simple circuit.Forward-Biased: When you insert a battery correctly into a circuit, current will be allowed to flow through a diode this is called a forward-biased state.There are two ways to describe how current will or won’t flow through a diode: Unlike passive components that sit idly by resisting or storing, diodes actively have their hands deep in the ebb and flow of current as it courses throughout our devices. The diode is well known for its ability to control the flow of electrical current in a circuit. Today, we’ll cover the diode, the notorious control freak that only allows electricity to flow in one direction! If you’ve seen a LED in action, you’re already well ahead of the game. These parts come to life when wired into a circuit and can manipulate electricity in many ways. There are two semiconductor components that you’ll be working with: the diode and transistor. It’s time to level up your knowledge and move beyond simple passive components into the realm of semiconductor components. Learn how the diode works to control the flow of electric current in a circuit with the use of n-type and p-type semiconductors.
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