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Still in Development3 April 2019
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• Basic Computer Complete
• 4 – USB2 Connectors
• BCM43438 WiFi and Bluetooth
• Low Energy (BLE) on board
• Runs on 5 volts through Micro-USB connector
• Video – built in HDMI
• 40pin extended GPIO
• 4 pole stereo output
• Software runs on SD Card
• Many options available –including color touch screens
• Software is a form of LINUX –no cost
• Starting cost – about $35
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Three Experiments of Operation Using Raspberry Pi
Packet Radio
Experiment 1: Using Standard TNC
Experiment 2: Using Sound Card
Experiment 3: Using PCB -TNC
1. Radio2. TNC – Heathkit
HK-213. Interface Cable4. RS232 to
Raspberry PI interface or USB to RS232 Cable
5. Software
1. Radio2. Interface Cable3. USB Sound Card4. Software
1. Radio2. Interface Cable3. PCB-TNC4. Software
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Experiment 3: Using PCB - TNC
1. Radio – checked and verified in Slide #9
2. Interface Cable – New interface cable to Radio
3. PCB-TNC
4. Software
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Working the Experiment
• Detailed information:
• http://www.qrvtronics.com/CatHAM_Radio/files/MyPacketRadio_Experiment_3.pdf
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End of Presentation - Questions?
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Books and Other Material Websites
• Books
• Raspberry Pi 2 Workshop Manual (Haynes)
• Raspberry Pi for Dummies (Wiley)
• Websites
• https://www.raspberrypi.org/learning/software-guide/quickstart/
• https://raspberrypihq.com/
• TNC (Kit $40) https://www.tnc-x.com/TNCPi.htm
• Raspberry Pi: ($35)• https://www.adafruit.com/product/3775?src=ra
spberrypi
• OR https://www.newark.com/raspberry-pi/rpi3-modbp/sbc-arm-cortex-a53-1gb-sdram/dp/49AC7637?src=raspberrypi
• New Raspberry Pi Zero W – Just $10 https://www.adafruit.com/product/3400
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Bibliography
• www.tapr.org
• M0HPA – for example
• http://www.g0hwc.com/raspberry-pi-ham-radio.html
• http://f6bvp.org/AX25_BBS_Node_RaspBerry_Pi_install.html
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Appendix
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HK-21 Pinout Schematic HK-21 Pinout Motorola Microphone Pinout
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Appendix
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Pinout for PCB-TNC
Puxing Wiring
General Connection
Micro USB Connector
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Cable for TNC-Pi
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J1 – DB9 MaleP1 – 2.5 mm Stereo Phone PlugP2 – 3.5 mm Stereo Phone Plug
P13 2 1
3 2 1
TX AduioPTT
RX AudioGND
Speaker
Mic
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Additional Products
12
$31.16
3.5 Inch 320 X 480 TFT LCD Display Touch Board - $16.51
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Hard Disk Controller
13$33.65 Hard Disk Controller
https://www.banggood.com/X820-2_5-Inch-SATA-HDD-SSD-USB3_0-Storage-Expansion-Board-For-Raspberry-Pi-3-Model-B-2B-B-p-1170391.html?rmmds=myorder&cur_warehouse=CN