Human folly for 02021-09-06

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• Design for a radio controlled car (planetanalog.com):

  discussion of #radio #communication #hardware for cheap #27MHz radio-controlled cars

• Maximum range of 27 MHz ISM band nlos radio broadcast (electronics.stackexchange.com):

  #27MHz #radio #communication range at 100mW (Czech legal maximum) might reach 10 km at a 1kbps data rate?

• Way down low 27MHz an unexpectedly useful radio control band allocation (lemosint.com):

  #27MHz #hardware vendor explains super cheap #radio #communication

• S0950061820330294 (sciencedirect.com):

  #paper on #mechanical properties of #seacrete #materials as a possible replacement for #concrete, describing it as “electrolytically precipitated calcium carbonate”

• (theatlantic.com):

  it’s possible to get #lead poisoning from bullets embedded in your body. #toxicology

• Gun violence survivors lead poisoning (time.com):

  #lead poisoning from bullets; Colin Goddard has dozens of bullet fragments from the Virginia Tech shooting and had blood levels “seven times higher than what is considered safe” which turns out to be 37 μg/dl, so he’s on chelation therapy. “at least 457 adult shooting survivors tested positive for elevated blood lead levels from retained bullet fragments between 2003 and 2012” #toxicology

• Melting temperature metals (engineeringtoolbox.com):

  melting points of metal #materials