Changes between Initial Version and Version 1 of construction_manual


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Timestamp:
Oct 9, 2013, 9:23:37 PM (12 years ago)
Author:
smoser
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  • construction_manual

    v1 v1  
     1
     2==== Infrastructure & Assembly ====
     3We used the following components to build up our client infrastructure. Note that links provided are just proposals for your convenience, other components will also work.
     4  - a FLARM device
     5  - a [http://www.raspberrypi.org Raspberry PI]
     6  - Power supply:
     7   - As Flarm is running on 12V and to ease use of a mobile flarmradar gound station powered by a 12V battery, we recommend a 12V power supply for the flarmradar ground station (FGS)
     8    - Use a standard power converter (e.g. [http://de.rs-online.com/web/p/steckernetzteile/6666928/ RS-Online]) if an electical outlet is available to power the FGS
     9    - For battery powered FGS, use a 12V battery as used in most gliders
     10    - To connect the FGS to external power supply or battery, use a connector, which is protected against polarity reversal (e.g. [http://de.rs-online.com/web/p/dc-buchsen/7684419/ RS-Online])
     11    - To protect your Flarm against over current, a 500mA fuse should be installed in the power supply route to the Flarm (e.g. [http://de.rs-online.com/web/p/sicherungshalter-fuer-frontplattenmontage/3595961/ RS-Online])
     12    - To connect your Flarm to the FGS, we recommend installing a RJ45 connector on the FGS front panel and to use a short network cable to connect the FGS to the Flarm
     13    - For pin assignment of the RJ45 please consult [http://www.flarm.com/support/manual/FLARM_InstallationManual_v5.00E.pdf Flarm Installation Manual]
     14    - Wiring instructions: 12V DC In --> Flarm fuse --> RJ45 connector --> network cable --> Flarm
     15    - Alternative way of Flarm power supply: [http://shop.segelflugbedarf24.de/product_info.php?info=p32_Update-Cable-RS232.html update cable]
     16   - Raspberry is running on a 5V power supply therefore the 12V power supply must be converted to 5V for the Pi.
     17    - Power conversion can be performed using DC/DC converter. Make sure the DC/DC converter can deliver at least 1A.
     18    - To protect your Pi against over current, a 500mA fuse should be installed in the power supply route to the Pi (e.g. [http://de.rs-online.com/web/p/sicherungshalter-fuer-frontplattenmontage/3595961/ RS-Online])
     19    - Use a Micro-USB connector to feed the power into your pi
     20    - Wiring instructions: 12V DC IN --> Pi Fuse --> DC/DC converter --> Micro-USB connector --> Pi
     21    - Alternative way of Pi power supply: A USB charger to power the Raspberry, just make sure it can deliver at least 1000mA
     22   - All in one power supply: The Mean Well power converter [http://www.meanwell.com/search/ADD-55/ADD-55-spec.pdf ADD-55A] offers 12V and 5V power output which can be run on standard power supply (88-264VAC) when available. If no power line is availble the device features a battery connection, which serves as backup power source.
     23  - Flarm <--> Pi Data connection
     24   - Flarm delivers RS232 signal on its data port. To feed this signal into the Pi, there are presently two alternative ways of doing:
     25   - RS232-USB-cable
     26    - Buy a RS232 to USB converter cable. Preferable one which uses the FTDI chipset (e.g TBD). If you use a different chipset, this may not be supported by default by the Pi operating system.
     27    - Attach the converter to your Flarm and to one of the USB connectors on the Pi
     28   - Serial-In of the Pi
     29    - The Pi features a serial interface (UART) on its GPIO pins.
     30    - Pi's serial interface works on 3.3V. Hower, Flarm supplies higher signal levels. DO NOT CONNECT THE FLARM DATA LINES DIRECTLY TO THE PI'S GPIO PINS!!!
     31    - Buy a RS232 to TTL level shifter (e.g. [http://www.ebay.de/itm/115200bps-Stucke-Mini-RS232-auf-TTL-Converter-Module-Konverter-Board-MAX3232-/261070156589?pt=Wissenschaftliche_Geräte&hash=item3cc8fe732d E-Bay] - costs less than 2 EUR)
     32    - Solder Flarm's TX, RX and ground (coming from the RJ45 jack) onto the RS232 side of the level shifter. Most level shifters have well labeled soldering pads
     33    - Solder 4 wires to the TTL side of the level shifter. Ground, +3.3V, TX and RX need to be connected
     34    - Buy a 2x13 IDC connector which attaches to the Pi's GPIO pin headers (e.g. [http://de.rs-online.com/web/p/idc-steckverbinder/3237902/ RS-Online])
     35    - Connect the four wires coming from the TTL side of the level shifter to the IDC connector. Pin layout depends on the version of your Pi. See [http://www.raspberrypi-spy.co.uk/2012/06/simple-guide-to-the-rpi-gpio-header-and-pins/ GPIO Pins]. If you have a revision 2 Pi, this is the pin connection: Pin1=+3.3V, Pin6=GND, Pin8=TX, Pin9=RX.
     36    - Disable console output and boot messages on the serial interface. See [http://www.irrational.net/2012/04/19/using-the-raspberry-pis-serial-port/ here]
     37
     38 
     39
     40- optional, recommended for a stationary installation: we use currently an [http://shop.segelflugbedarf24.de/product_info.php?info=p29_FLARM--Outside-Antenna-4-m-cable.html external antenna]