glossary:glossary_r
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glossary:glossary_r [2017/02/16 10:04] – [Raspberry Pi] WortingUK | glossary:glossary_r [2020/03/12 05:25] – [RailCom] michael_smith | ||
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[[start|Return to main Glossary index]] | [[start|Return to main Glossary index]] | ||
- | ===== Raspberry Pi ===== | + | ===== RailCom ====== |
- | [[https:// | + | |
- | Raspberry Pi Zero (aka Pi0) a single board computer | + | |
- | - 1 GHz single-core CPU, 512 MB RAM, HDMI, micro USB and 40 pin GPIO (~ £4) | ||
- | Raspberry Pi 3B (aka Pi3) a single board computer | + | A relatively new DCC standard to implement return messages from a train/ |
- | - 1.2 GHz quad-core CPU, 1 GB RAM, Ethernet, Wireless, Bluetooth, HDMI, 4 x USB and 40 pin GPIO (~ £35) | + | RailCom works by having the command-station/ |
- | ===== RailCom | + | |
+ | RailCom/Plus allows: the identification of unknown trains; block occupancy; transmission of train information, | ||
- | A relatively new DCC standard to implement return messages from a train/ | + | ===== Raspberry Pi ===== |
- | RailCom works by having the command-station/booster stop driving the rails between DCC packets, during the inter-message idle packets, and then the decoder generates a 20 mA serial encoded signal. | + | [[https:// |
- | RailCom/ | + | Two current models |
+ | |||
+ | Pi Zero (aka Pi0) | ||
+ | 1 GHz single-core CPU, 512 MB RAM, HDMI, USB and 40 pin GPIO (~ £4) | ||
+ | |||
+ | Pi 3 B (aka Pi3) | ||
+ | 1.2 GHz quad-core CPU, 1 GB RAM, Ethernet, Wireless, Bluetooth, HDMI, 4 x USB and 40 pin GPIO (~ £35) | ||
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The Positive voltage goes to the Negative part of a circuit and vice versa. | The Positive voltage goes to the Negative part of a circuit and vice versa. | ||
+ | |||
+ | ===== Reversed Linked Section Control ====== | ||
+ | |||
+ | This is a method for the control of the switching of power to sections of track on a model railway layout. | ||
===== RFID ===== | ===== RFID ===== | ||
**R**adio **F**requency **ID**entification\\ | **R**adio **F**requency **ID**entification\\ | ||
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[[http:// | [[http:// | ||
[[glossary: | [[glossary: | ||
+ | **MERG RFID systems**\\ | ||
+ | The tags generally used in MERG RFID systems have a 40 bit ID number, that is 5 bytes, when transmitted there is then a sixth byte added which is a checksum for data integrity. The tag readers transmit the data over a serial link using [[glossary_h# | ||
+ | The MERG Concentrator replaces the STX with a reader identification letter, A to H or I to P. For CBUS the incoming data is converted back to its original 5 bytes and checked against the checksum. These 5 bytes are then transmitted as bytes 3 to 7 of an 8 byte message. < | ||
===== Risk assessment ====== | ===== Risk assessment ====== | ||
glossary/glossary_r.txt · Last modified: 2023/12/11 11:06 by michael_smith