Month: July 2019
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Battery investigations
Iโve been suspicious for a while about how hard my batteries for house are losing voltage over a ~ 12 hour day. I know the fridge compressor comes on periodically at 3 amps to keep the coolant moving around, but that doesnโt add up to taking a battery from fully charged to near fully discharged…
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Flooring contractor fired
For the flooring of my house, I opted to go with MNP Flooring – I had been talking to a different firm earlier in the year about doing engineered wood, and when I reached out to Alex N. at that company, he said they didn’t do laminate or carpet, but that he could arrange that…
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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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More than slightly floored
Getting there, skirting is in upstairs, architraves are in, and downstairs has some flooring.
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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.…
