Re: ICT WSPR Tracker BOM?
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The resonator should be bigger. Or the PCB footprint smaller. I came up with the BOM, see below:
Resistors
R1 4k7 0402
R2 4k7 0402
R3 DNP 0402
R4 4k3 0402
R5 100k or 110k 0402
R6 10k 0402
Capacitors
C1 4.7uF 0603
C2 1uF 0603
C3 100nF 0402
C4 1uF 0603
C5 DNP 0402
C6 100nF 0402
C7 100nF 0402
Oscillators
Q1 27MHz TCXO TXETBLSANF-27.000000
RES 4MHz Resonator with included loading caps ECS-SR1-4.00-B-TR
Note: I used a different Murata Resonator but now it is no longer available.
Actives
GPS Ublox Max M8C
MCU Atmega 328P
Transmitter Si5351A
High side switch MIC94092
Reset monitor MIC2775
Good light, good magnification, and no coffee!
I thought the same thing. How much weight is saved by not using something more usable like 0802?
It will be a good challenge though..
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