pwd=b2pLZWk1LzI1cmY4bVFRV2x3Wko4Zz09 Meeting ID: 885 2907 8014 Passcode: Literacy One tap mobile +16465588656,,88529078014#,,,,,,0#,,15476386# US (New York) +13017158592,,88529078014#,,,,,,0#,,15476386# US (Washington D.C)

. > Provision for a coin cell back up battery. > > unknown) One of the DS3231 parts, in a thermal enclosure that has a time > constant in excess of 24 hours. I think it's about the size you request. A > temperature sensor changes the divisor based on calibration data. Sort of a > doubly compensated device TTCXO or T2XO.

.: Unobtainium (looses a proton)-> Readiliobtainium Readiliobtainium (looses a proton)-> Notsorarium Notsorarium (looses a proton)-> Aprilfoolarium Tom Abbott (inventor of the Calculagraph) coined the phrase "Time is Money", see: http://www.prc68.com/I/Calculagraph.shtml Have Fun, Brooke Clarke http://www.PRC68.com Tom Holmes, N8ZM wrote: > Brilliant!

I have seen some RTC’s that won’t last a month on a coin cell. My recollection is that the Oncore backup is closer to that category than the “many years on a cap” group.

> > Now, if you have the more normal tiny coin cell involved with 1/10 or > 1/100 that capacity and much lower self discharge …. > > Bob > >> On Nov 2, 2014, at 3:17 PM, Hal Murray wrote: >> >>> By the way the z3801 is off most of the year so the drains quite small. >> >> I think that's backwards.

The write cylces, speed, and power consumption of FeRAM/FRAM is so good that TI has been using it as SRAM replacement for the MSP430FR family of lowest power uC (think of years-of-runtine-from-a-tiny-coin-cell kind of low power). So, if continuously writing the EFC value to FeRAM simplifies the software flow, then this isn't a wrong thing to do.

the connection would have to be a minimal 3-wire serial (RS-232 or TTL/UART)https://en.m.wikipedia.org/wiki/RS-232#3-wire_and_5-wire_RS-232 Ground is easy to find, and TxD and RxD is a coin-toss (50:50) if you hook-up right. greg, w9gb === I thought I could answer this question (Acron Zeit) easily, since I had the cable right at hand.

. > >> Both of these have 3 battery packs made of some form of coin cell, NiCd, > >> 225ma, 5 to a stack. > > > > These are what I'm familiar with (I presume you mean 4 packs, not > > 3?). 

An even better way was to use a Mercury coin cell since they were 1.35 volts and very stable. They were used for light meters and voltage references because of the very flat discharge curve. But when you are looking for many more digits of accuracy/precision then a battery may not be the best choice since pretty much everything will cause a variation.

Participants will: Hear an overview of ALL IN, recognizing the collaborative work that led to this initiative   Meet ALL IN's Director and Coordinating Council members   Get informed about ALL IN’s 2023 priorities   Explore opportunities for engagement via research, communications, and partnership This meeting will be recorded.