N A T H A N P R E N T I C E I 6 N T P

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1 RASPBERRY PI AMATEUR RADIO M N A T H A N P R E N T I C E I 6 N T P

2 WHAT IS A RASPBERRY PI Low cost computer Credit card sized Originally made by The Raspberry Pi Foundation to encourage young children to program Used in schools all over the globe to teach computer programming and computer science Also used by others to create simple, to complex solutions to problems. There is a wide online community of people, sharing project ideas and inspiration. Arduino Raspberry Pi

3 TYPES OF RASPBERRY PI Original Pi 512MB RAM 2 USB Ports Ethernet 700MHz Dual Core Processor 26 GPIO Pins 3.5mm Audio Jack HDMI Composite Video Port Camera Port Pi 2 Pi 3 Same as before, though upgraded: 900MHz Quad Core Processor 4 USB Ports 1GB RAM 40 GPIO Pins 3.5mm Audio Jack and combined Composite Video Port 1.2GHz Quad Core Processor (64bit) WIFI and Bluetooth Connectivity built-in

4 TYPES OF RASPBERRY PI Pi A+ Same as Original Pi, just smaller form factor 40 GPIO Pins Micro SD Card Slot Instead of full sized slot in Original Pi Low power consumption ~ 0.5W - 1W 2cm shorter, + slimmer design Better audio circuit Pi Zero (W) Built in LAN/Bluetooth Connectivity 1GHz Processor 512MB RAM Mini HDMI Port USB On The Go Port Cheapest Pi ~ All the versions of Raspberry Pi run on a special Operating System (OS), the operating system is saved and burned onto a SD card, and then the card is put in the Pi. There are many operating systems, the main being Raspbian, (Based on Debian, which is a Linux OS)

5 SO WHAT CAN IT DO? Ask yourself another question What do you want it to do?

6 MEDIA CENTRE XBMC Media player uses an engine called Kodi to connect to the internet. This makes it possible to access streaming sites such as YouTube, BBC iplayer, 4OD. Online radio can also be listened to Completely free to use

7 SMALL DESKTOP COMPUTER Could be used on a daily basis Small tasks performed with no problem Larger tasks may prove difficult Web browsing is very effective, though video streaming not recommended Similar performance and speed to a modern phone when surfing the web LibreOffice can be installed (Equivalent to Microsoft Office, files are compatible) It is a full desktop editing suite. Completely free to install

8 GAMING There is a specialised app store for gaming on the Raspberry Pi A special Pi version of Minecraft installed by default All games can be edited and modified since they are open source Schools are encouraged to teach programming through Minecraft

9 WEBSERVER Can be used to host a personal website Some configuration needed on home router Domain name can be set up for free Simple to do Reliable DIY Webhosting, can be used as a hub for other projects. E.g. turning on lights or heating from phone

10 SURVEILLANCE SYSTEM Raspberry Pi has a slot for both a normal camera, or an infrared camera Normal camera used for taking photos and videos during daytime. Infrared camera can be used for night time photos and videos Possible uses include a daytime and night-time surveillance system, without the need for lights to be on outside to keep an eye on property outside

11 HOME AUTOMATION If something needs done, chances are it can be solved using the Raspberry Pi Need a window opener in the greenhouse when it gets over 30 C?

12 SURE!

13 HOME AUTOMATION If something needs done, chances are it can be solved using the Raspberry Pi Need to turn on the heating in your home as you are coming home from work?

14 EASY!

15 HOME AUTOMATION If something needs done, chances are it can be solved using the Raspberry Pi Need someone to feed the dog while you sit back and watch TV?

16 NO PROBLEM!

17 USES IN AMATEUR RADIO All of these are great, but how can the Raspberry Pi be used in amateur radio?

18 MORSE OSCILLATOR Original article features a MFJ 550 Also features a homemade Morse key Leslie s homemade toothbrush Morse key from last month s talk could be easily implemented into this project Works well, recognises what you are sending Brilliant for practicing or learning 3D Printed Morse Key Full project details found at this link, along with the source code:

19 DECODE DATA MODES FLDigi can be used for decoding digital/data signals Decodes wide range of digital modes including RTTY and PSK Software installs onto raspberry pi SD card, and Pi is connected to radio output. Basically replaces the need for a dedicated home PC to run the software. A Pi is only the size of a credit card and uses up very little power. Pre installed SD Card available from Mike Richards G4WNC Card costs 9.50 and guaranteed 100% success on first boot

20 SOFTWARE DEFINED RADIO (SDR) Uses RTL Dongle (Frequency range of 25MHz to 1.8GHz) Other dongles can be used for different frequency ranges Uses SDR# (Pronounced SDR Sharp) software Pre installed SD cards can be bought again from Mike, G4WNC

21 WSPR STATION QRP/QRPp Mode Pronounced Whisper (Weak Signal Propagation Reporter) Sends low power transmissions to test propagation paths on MF, HF and UHF bands Software can be installed, however a Low Pass Filter is required Mostly used on 20m band A Shield/Hat is required for the Pi It contains all the extra required hardware Map of propagation shown online 20m Hat/Shield

22 SATELLITE TRACKING - GPREDICT Real time satellite tracker and orbit prediction Free to download, simple to use Can be used to track ISS also Displays satellite passovers in multiple forms, tables graphs, radar views etc Rotor control available to direct antennas towards satellites.

23 HOME FM RADIO TRANSMITTER PiFM is a downloadable package made by Make Magazine Songs can be added to the Raspberry Pi storage Radio loops songs continually Pi can transmit between 1MHz and 250MHz, choose the frequency carefully! <1h setup and you have a fully functioning FM transmitter for your house, or car. Simplest Pi project, just install the files and connect ideally a 75cm piece of wire to one of the pins. Full tutorial and article at:

24 PIVFO (BASED ON FREQ_PI MODULE) Turns Pi into a Variable Frequency Oscillator using the clock output of the Raspberry Pi Transmits a carrier wave on desired frequency Filters are recommended for operation Can be used along with the Language Spy boards (Sold at 2016 LEARC Rally) RF Breakout Kit (BNC Connector) Low Pass Filter Kit ~ 8.00 Sold for 40m, 30m, 20m, 17m

25 WEATHER STATION - MAPLIN For the IRTS Sunday broadcast, some people like to say what the weather is like with them. This could be done online by using a phone or a more professional approach would be a weather station, so exact information can be given about the conditions at the QTH.

26 WEATHER STATION RASPBERRY PI Or, you could buy a raspberry pi, and some sensors to create your own weather station! Weather Station Components Price Raspberry Pi Temperature Sensors x Humidity Sensor 3.45 Barometer/Pressure Sensor Grand Total 40.27

27 THE IDEAS ARE ENDLESS Amateur radio clock? Displays UTC Displays time at QTH Alarm to remind to repeat callsign during contact Keep a digital log using the Raspberry Pi as a logging device? Free software (Linux database equivalent) Labels etc can be printed out easily for QSL Cards Anything is possible

28 THANK YOU FOR LISTENING If there are any questions, I d be happy to take them.