Saturday, 30 November 2013

piRadio Hardware & Connections

Hardware

The connections detailed here work with the code uploaded to Github however it is a simple enough procedure to reconfigure as needed. Most of the hardware connections are defined in oeta.h

1x case
1x rPi (either Model A or B works fine, Model A uses less power so for portable operation it might be a better choice. a WiFi USB dongle can be used for network mode at home)
1x RF upconverter. I chose the Ham-It-Up because it has a switch for passthrough or up convert mode. If you choose an up converter without this feature you'll need to set up a way to disable it if you want to receive above HF) 
1x DVB-T dongle (E4000 are the best models with the widest receive band)
1x SMA male coax cable, 6" (one end will be cut so male-male or male-female are fine)
1x 2.2" SPI LCD (ebay is a good source, ~$8)
1x 3.5mm panel moult headphone socket (stereo or mono is fine depending on preference)
Push button rotary encoder with 6mm shaft and knob
2x SPDT
1x DPDT
1x MausBerry shutdown circuit that allows use of your own switch (if you want keyboard-les operation). This seems the simplest approach or you can create your own using a small Arduino board. If you aren't running on battery then this isn't really needed
4x PCB board spacers, 15mm, (brass or plastic are ok)
4x 40mm PCB spacers to separate the acrylic sheets
2x acrylic sheets (A5 size)
A selection of duPont cables for connecting to the rPi
1x USB type B male socket


Connections

P1-4: To Ham-It-Up converter 5v
P1-6: To Ham-It-Up converter GND
P1-14: Rotary Encoder (middle pin)
P1-16: Rotary Encoder (right pin with pins facing away)
P1-18: Rotary Encoder (left pin with pins facing away)
P1-20: LCD GND & Menu select (push button on the rotary encoder) (splice cable)
P1-22: LCD D/C
P1-24: LCD CS

P1-1: LCD 3.3v
P1-3: Menu select (push button on the rotary encoder)
P1-5: TCP / Standalone radio mode select switch
P1-7: Mausberry switch out
P1-9: Menu select (push button on the rotary encoder)
P1-11: Mausberry switch in
P1-13: HF / passthrough mode switch
P1-15: LCD reset
P1-19: LCD SDI
P1-21: LCD SDO
P1-23: LCD SCK
P1-25: TCP / Standalone radio mode select switch

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