All they'd need: One PIC, or other sub-$ microcontroller. A capacitively-coupled power supply, a couple of isolation diodes, a zener diode and a resistor, a rechargeable coin cell suitable for CV charging, a thermistor, a beeper, and a switch. What do you think that would cost in Chindustrial quantities?
-- Jim > On Sep 2, 2022, at 6:42 PM, OK Don via Mercedes <mercedes@okiebenz.com> wrote: > > What Jim said !!!!! > > On Fri, Sep 2, 2022 at 8:34 PM Jim Cathey via Mercedes < > mercedes@okiebenz.com> wrote: > >> <snip> >> It's ridiculous that they can't spend $3 these days to put in a stock >> freezer alarm, one that beeps loudly if it's unplugged, or if it goes >> above freezing inside. What's more, you can't even buy something >> that does this. You apparently have to buy _two_ somethings to >> get this level of protection. >> >> -- Jim >> > > -- > OK Don > > "Quality of life is inversely proportional to the amount of clothing you > are wearing." > > "Whenever you find yourself on the side of the majority, it is time to > pause and reflect." Mark Twain > > “Basic research is what I’m doing when I don’t know what I am doing.” Wernher > Von Braun > 2013 F150, 18 mpg > 2017 Subaru Legacy, 30 mpg > 1957 C182A, 12 mpg - but at 150 mph! > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
