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--- glossary:glossary_l [2018/09/28 09:11]
Bob Vetterlein
+++ glossary:glossary_l [2019/10/20 12:29]
tom_shenton [LED] the picture is incorrect, because the longest leg is conventionally the positive leg
@@ Line 22: / Line 22: @@
 ===== LED =====
-Light Emitting Diodes (LEDs) emit light when an electric current passes through them
+Light Emitting Diodes (LEDs) emit light when an electric current passes through them. The longest leg is the +ve leg which is also called the anode (not as in the picture)
  \\ {{:glossary:led-1.gif}}
 \\Circuit symbol:
@@ Line 32: / Line 32: @@
-A German [[glossary:glossary_d#dcc|DCC] system and decoder manufacturer.
+A German [[glossary:glossary_d#dcc|DCC]] system and decoder manufacturer.
+=====LiFo=====
+__L__ast __i__n __F__irst __o__ut, data buffer where the most recent entry is the first to be retrieved. Commonly referred to as a 'Stack' it is used to save the return address (Program Counter) and other data that must be restored when a Sub Routine terminates.

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