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Recent content by Eufalconimorph

  1. Eufalconimorph

    Smart Garden System

    I'll note that I2C is designed as an on-PCB bus, it's not meant to run over long cables. It *can*, but excessive bus capacitance has certainly caused me annoying failures in the past. I much prefer differential buses like RS-485, CAN, or Ethernet, but do a test with I2C first because it's MUCH...
  2. Eufalconimorph

    what factors consider as data loss

    That's not data loss, that's almost certainly a code bug. First guess would be you messed up a timer configuration, e.g. got the wrong prescaler setting. You might want to use a logic analyzer on the I2C bus, and verify that you're sending samples quickly enough. I'd bet you aren't. I'll also...
  3. Eufalconimorph

    Air India 787 crashes on take off

    Another video with sound, that *does* sound like a RAT deployed. But I agree with kontiki99, it's way too early to tell much of anything useful. The causes of the crash will likely be found, since it was low speed the FDR & CVR will almost certainly have survived. There's a lot of confusing and...
  4. Eufalconimorph

    what factors consider as data loss

    Each component can have data loss. I'd guess that the analog signal integrity will be the hardest to deal with, though a lot will depend on how long the analog cable is & how much environmental EM noise there is. Signal bandwidth might also be a concern, depending on how fast the edges of the...
  5. Eufalconimorph

    Titan sub noise heard on board support ship.

    It's just non-religious faith. Faith (belief held without evidence or in the face of evidence to the contrary) shows up all over the place, not just in religions or flat-Eartherism. E.g. I'd bet Rush had faith that Titan's design was safe, and that faith contributed to him ignoring the warning...
  6. Eufalconimorph

    Most (all?) hybrids and BEVs have a 12V (or 16V) battery. Why?

    The 12V system is already powered primarily by a DC-DC converter from the traction battery, there's just a 12V battery to provide power when the traction battery is disconnected or otherwise inoperable (discharged into lockout, overheated, etc). That allows powering things like the hazard lights...
  7. Eufalconimorph

    keep getting this pop-up every 5 seconds.

    Sounds like your ad blocker is broken. I recommend uBlock Origin on Firefox (doesn't work as well on Chrome or other browsers) but any ad blocker is better than none. Never forget that ads can run scripts, and have been used as attack vectors to spread malware. They're a first line of defense...
  8. Eufalconimorph

    Archiving a Thread

    Also note that this site is public. Assume that all the usual archiving sites have archived it, e.g. archive.org, archive.is, etc. Remember Murphy's Law of Public Data: once it's on the internet it's public forever, unless you need to find that data again in the future at which point it'll...
  9. Eufalconimorph

    Helicopter crash Hudson River

    Helicopters are thousands of parts temporarily flying in close formation. My favorite explanation is that they work because they're so ugly the ground doesn't want to touch them, but when the parts also don't want to be something ugly, so when the parts go their separate ways that ground stops...
  10. Eufalconimorph

    AA jet and Military helicopter collide over Potomac

    Yep. The FCC regulates allocation of the RF spectrum. They sold unused spectrum to the telecoms for 5G, with a ridiculously huge 220MHz guard band between that and the allocation they'd sold to the aircraft radar altimeter & TCAS manufacturers (the 5G allocation in question is 3.7-3.98 GHz, the...
  11. Eufalconimorph

    need HP calculator

    I've got multiple calculator apps on my phone. And some on my computers. And physical calculators. Sometimes it's nice to not need to swap what's on screen, and instead just swap to a different device. Definitely worth having a good phone app or two (or eight, maybe I have too many) for...
  12. Eufalconimorph

    Minimum reliable SPI clock speed MPC3008 ADC

    That chip uses the SPI clock to generate the sample clock for the ADC. > The MCP3004/3008 A/D converters employ a conventional SAR architecture. With this architecture, a sample is acquired on an internal sample/hold capacitor for 1.5 clock cycles starting on the first rising edge of the serial...
  13. Eufalconimorph

    flame sensor

    Which flame sensor? Link the datasheet, there are too many different types with entirely different operating principles to know anything from just "flame sensor". Likewise for the solenoid. Do you have a circuit diagram? It's difficult to follow what's connected where from your description. The...
  14. Eufalconimorph

    need HP calculator

    There are lots of RPN calculator app or programs. RealCalc on Android, Orpie for Linux/MacOS/BSD CLI, or for a more full-featured GUI application Qalculate is extremely capable (even includes propagation of uncertainty & interval arithmetic).
  15. Eufalconimorph

    Toronto place crash

    Another angle here
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