Glossary L

Return to main Glossary index

Latching

A pulse method to change the state from on to off or vice versa.
http://www.heathcote-electronics.co.uk/RelayBrd.htm
http://www.4qdtec.com/trd.html

Lead free

This is a change in the content of solder. Lead free solder is generally recommended due to Health and Safety considerations, but 60:40 tin:lead is preferred for electronic kits and is still available from suppliers such as Rapid Electronics.

LED

Light Emitting Diodes (LEDs) emit light when an electric current passes through them
\\Circuit symbol:
http://www.merg.org.uk/merg_resources/led.php
http://www.kpsec.freeuk.com/components/led.htm

LENZ

A German dcc system and decoder manufacturer

Lighting decoder

A DCC decoder made especially for lights for a loco or carriages.

Logic

In a model railway it is a way to do step by step sequence to make the train do what you require.
Logic
Logic Gates