I diode is the electronic version of a one way valve in plumbing. It allows current to flow in one direction but not the other. How it does this is basically magic, but if you must know, study semiconductors and semiconductor junctions first.
Like all things, diodes are not perfect: There will be a slight flow of current backwards before the diode kicks in and stops it. They are also limited: If you push hard enough (high enough voltage) the diode will give up and conduct in the backwards direction. They also will not conduct in the forward direction until enough voltage has built up to activate the diode; the forward voltage drop. All of these imperfections are different for different types and grades of diodes. Read the datasheet.
The Light Emitting Diodes, or LED is a type of diode.
Which is anode and cathode? Easy way to remember this, look at the diode
symbol and you will see that part of it forms a K, which stands for Kathode
(nay, Cathode). Just remember not to spell it like that when you write it
(K)athode Anode ---------|<------
Thanks to Michael Rigby-Jones for that!
|file: /Techref/diodes.htm, 1KB, , updated: 2016/7/6 10:59, local time: 2021/10/23 05:38,
|©2021 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?|
<A HREF="http://www.piclist.com/techref/diodes.htm"> Diodes</A>
|Did you find what you needed?|
PICList 2021 contributors:
o List host: MIT, Site host massmind.org, Top posters @20211023 Neil, Harold Hallikainen, Alan Pearce, RussellMc, Bob Blick, Allen Mulvey, Dwayne Reid, madscientistatlarge, Sean Breheny, Justin Richards,
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
Welcome to www.piclist.com!