Tag: electronics
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Cerbo GX MK2 and Blue Opal
For the longest time, I’d avoided going the Victron hardware route – they seemed pricey for the offering, and I wasn’t sure I could make good use of the functionality on Blue Opal. I experimented with running the Venus large image on a Raspberry Pi at one stage, while I was trying to get the…
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Solar upgrade
As noted a while back, the solar panel I have on Blue Opal wasn’t working well with the Votronic MPPT solar charger. The panel I have is a 55 Wp panel, and the testing I did led me to the conclusion that it basically can’t put out enough voltage that the Votronic can buck down…
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Broken wind indicator
Clearly on port tack, but the wind is coming from starboard 90. The wind speed indicator has been borked for a while, but direction being borked too is new. Bother.
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Sending engine RPMs to the network, 3/x
A small re-write of the sender into a Click driven CLI, making hard-codes into CLI arguments.
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Sending engine RPMs to the NMEA bus, 2/x
It turns out that iNavX doesn’t support rendering ERRPM; it only supports the NMEA 2000 variant, PGN 127488. This led me down the path of trying to work out if I could send PGNs to the MiniPlex3 via the WiFi interface. The answer is sort of yes – you can send a specially crafted 0183…
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Sending engine RPMs to the NMEA bus, 1/x
Whilst Dad was visiting, we put his portable oscilloscope across the two terminals on the back of the tachometer, and found a very nice mV signal that changes frequency with engine revolutions. This means that a bit of circuitry plus a microcontroller will enable me to push the rev count to the boat data network.…