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rad1o: CCCamp15 SDR Badge

Home Page: https://rad1o.de

License: GNU General Public License v2.0

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hardware's Issues

Replace the two SI5351A with one SI5351C

Check land pattern of mixer

Check flash part and footprint

Increase min distance of copper to edge to 0.4 mm

See http://www.eurocircuits.com/clientmedia/ecImage/pages/pcb-layout-data/ec-design-guidelines.pdf page 10

Discuss multiple blocking Cs for the trx

Check paste for RF switches

Optimize component spacing in HF section

Some of them seem to close to each other.

Ground LNAs properly

From the datasheet:

Exposed Pad. Connect to PCB ground plane by a 3 x 3 array of vias. Connect to ground lead
(1, 3, 6, 8) land patterns and to layer 1 ground plane with thermal relief traces.

Provide virtualbox image offering common tools

LPC buildchain
some SDR software http://www.rtl-sdr.com/big-list-rtl-sdr-supported-software/

PEN2-Pin am Ladecontroller

Der Pin PEN2 am Ladecontroller muss entweder mit PU oder PD versehen werden, da der Ladecontroller sonst eventuell mit nur 100mA I_max startet und der NXP vielleicht dadurch nicht hochkommt.

Make top layer RF traces .1 mm thicker

This is required for the new stackup

Add audio jack and amplifier

Check if DC blocks are needed on the switches.

The switched on the hackrf need a dc block: http://www.skyworksinc.com/uploads/documents/SKY13350_385LF_201174G.pdf

check if ours need that too.

Add fiducials

Replace USB socket footprint with correct one

Akku-Thermistor-Pin: Routing falsch

Das Routing am Akku-Thermistor ist noch falsch:

THMSW: Widerstand nach THM und THM an den Akku
THMEN: auf GPIO vom NXP

Arrange headers in 2.54 mm grid

Add optional micro SD socket on the back

Add layer legend

Add silkscreen art work

Check NTC characteristics of battery

We need a beta of 3477

Add option to connect the LCD to the SPI of the TRX/ADC

Add two WS2812B footprints

Add LED driver for LCD

Check that the firmware does not clock the CPU from the external PLL

Maxim footprints not in line with recommended land patterns from PDFs

See http://pdfserv.maximintegrated.com/land_patterns/90-0007.PDF

It recommends 0.2 mm width pads. Ours are 0.254 mm. This creates problems with clearance. See also the revision history of the PDF.

Calculate feedback resistors for the voltage regulators

@amperpirat I think you already did that?

Check forward voltage of LCD backlight again

Check land pattern of high pass

Use correct 32 kHz crystal footprint

Add calibration termination

Check IPC footprint of all passives

Add optional filter for analog clocks

Check joystick location

Recheck soldermask for BGA

Just to be sure

Add holes for the lanyard

Two holes, so the thing does not turn

Add paste and stop to footprint of Maxim VREGs

The paste is missing completely and the stop layer is removed on only half the pads

Move power switch to enable pin of IC701

Add PCB antenna

Add two LEDs and move LEDs around

New footprint for new switch

http://www.alps.com/prod/info/E/HTML/Switch/Slide/SSSS8/SSSS811101.html

Set soldermask oversize to 0

See http://www.eurocircuits.com/clientmedia/ecImage/pages/pcb-layout-data/ec-design-guidelines.pdf page 15

Add 3-pin JST connector for the battery

Check paste layer and via placement below HF components

Take the HackRF as reference

Check boot from USB option

I think it needs some way to be triggered. Default should be the flash with some custom bootloader in it.

Check heatsinking of the VREGs

Connect second I2C bus for PLL cascade

Change width of traces to RF switches to 0.25 mm

This removes the DRC errors

Add voltage divider to measure battery voltage

Change MAX8394 to MAX8934

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