Differences

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--- glossary:glossary_l [2013/04/07 08:44] – created Anotheran
+++ glossary:glossary_l [2019/10/20 12:29] – [LED] the picture is incorrect, because the longest leg is conventionally the positive leg tom_shenton
@@ Line 7: / Line 7: @@
-A pulse method to change the state from on to off or vice versa.     \\ [[http://www.heathcote-electronics.co.uk/RelayBrd.htm|http://www.heathcote-electronics.co.uk/RelayBrd.htm]]  \\
+Latching can apply to both mechanical devices and electronic circuits.
-[[http://www.4qdtec.com/trd.html|http://www.4qdtec.com/trd.html]]
+An example of mechanical latching would be a push on / push off switch, [[https://en.wikipedia.org/wiki/Latching_switch|see here.]] See also description of a [[https://en.wikipedia.org/wiki/Relay#Latching_relay|latching relay.]] (e.g. [[http://www.digikey.ca/product-detail/en/EE2-5NU/399-11056-5-ND/4291122|relay]])\\
+An example of an electronic latch would be [[https://en.wikipedia.org/wiki/Flip-flop_(electronics)|a flip-flop]] or bistable circuit.\\
+A standard relay may be made self latching by supplying a current path for the coil through one of its normally open contact sets.
+===== Layout Command Control =====
+{{ :lcb:lcc.png?100|}}
+[[:lcb:start&#layout_command_control_lcc|Layout Command Control]] (LCC) s a system for controlling all the functions on your layout that don’t have to do with how fast the locomotive is moving -- things like signals, or sounds, or passenger car lighting.  LCC is NMRANet, just under a different name.  LCC is designed as a separate, generic control bus which is positioned to take the load off your throttle bus. It is a bi-directional data bus that can send and receive data.  Since it is an NMRA Standard, you are not confined to one manufacturer's products. Any manufacturer can make LCC compatible devices.
 ===== Lead free =====
@@ Line 19: / 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:
  \\ {{:glossary:led-2.gif}}
-\\ [[http://www.merg.org.uk/merg_resources/led.php]]
+\\ [[https://www.merg.org.uk/merg_resources/led.php]]
-\\ [[http://www.kpsec.freeuk.com/components/led.htm|http://www.kpsec.freeuk.com/components/led.htm]]
+\\ [[http://electronicsclub.info/leds.htm|http://electronicsclub.info/leds.htm]]
 ===== LENZ =====
-A German 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.
@@ Line 35: / Line 41: @@
-A DCC decoder made especially for lights for a loco or carriages.
+A [[glossary:glossary_d#dcc|DCC]] decoder made especially for lights for a loco or carriages.
@@ Line 41: / Line 47: @@
-In a model railway it is a way to do step by step sequence to make the train do what you require.     \\ [[wp>Logic]]
+In a model railway it is a way to do step by step sequence to make the train do what you require.     \\ [[wp>Logic]]\\ [[logicgates|Logic Gates]]