Recent content by EasyGoing1

  1. EasyGoing1

    Crystal Selection

    This is the crystal I decided to purchase. I'm sure it will work just fine. Thank you everyone who took the time to reply, your time is much appreciated. Mike
  2. EasyGoing1

    Crystal Selection

    I had no idea that body temp was a factor in watch engineering ... fascinating! Thank you. :cool:
  3. EasyGoing1

    Crystal Selection

    Since I never once thought I needed an external resistor, can you enlighten me by citing the exact verbiage that I used that led to your conclusion that I thought I needed an external resistor? Showing me where I went wrong will help me in the future. Thank you.
  4. EasyGoing1

    Crystal Selection

    I never once thought I needed an external resistor. I am merely trying to spec a crystal that meets the requirements of my project. And I have been unable to find a 32.768 kHz crystal that also has a load capacitance of 6 pico farads and series resistance rating of 45k Ohms and therefore my...
  5. EasyGoing1

    Crystal Selection

    That's interesting... so that makes me wonder ... lets assume 4 seconds per day as an expected drift ... is it reasonable to assume that if it were 4 seconds slower one day, then it would always drift 4 seconds slower every day? Or could that change depending on whether or not its summer time or...
  6. EasyGoing1

    Crystal Selection

    See the details on this crystal which clearly has a value of 50k. I have not been able to find one yet with all three of the required specs (32.768 kHz; 6pf; 45 kOhm), which is why I started this thread ... if 50k is "close enough" then ill buy it ... but if its going to cause a drift in time...
  7. EasyGoing1

    Crystal Selection

    It is the property of the quartz crystal that I am referring to. Not sure why you thought I was intending to include a separate resistor???
  8. EasyGoing1

    Crystal Selection

    looking at datasheets from crystals on mouser, the reported spec for series resistance is usually a range that tops out at 50k so im wondering how relevant this spec is to the accuracy of the crystal ... my knowledge of crystals is pretty much nill.
  9. EasyGoing1

    Crystal Selection

    OK, I can appreciate that ... what about the series resistance? It calls for 45k, but I'm able to source 50k fairly easily ... would a 5k difference be very relevant?
  10. EasyGoing1

    Crystal Selection

    Hello, I need to replace a crystal that I busted the leads on ... the specs call for a 32.768kHz at 6pf with 45k series resistance My question is: How relevant is the load capacitance and series resistance in terms of accuracy? The application is a real time clock for an Arduino project using...
  11. EasyGoing1

    Voltage Divider Questions

    That screen shot was taken from my iPad while running the circuit in simulation using the iCircuit app. The voltages are correct, but as KrisBlueNZ pointed out, finding those resistor values will be difficult if not impossible, so I will obviously need to find more common resistor values that...
  12. EasyGoing1

    Voltage Divider Questions

    Gryd was the first one to mention the fact that pins 2 and 3 are only for voltage 'sensing' ... so when I said it makes perfect 'sense' ... I kinda made a punny... And I can find this program where, exactly? :)
  13. EasyGoing1

    Voltage Divider Questions

    All good Steve, thank you again for taking the time to respond. :)
  14. EasyGoing1

    Voltage Divider Questions

    Thank you KrisBlue... I actually worked out the above circuit based solely on Gryd3's reply before even reading your reply. And as you said, Steve's reply was a tad confusing, so I just went to the next one where the light bulb came on in my head (no offense Steve, I absolutely appreciate you...
  15. EasyGoing1

    Voltage Divider Questions

    Thank you! I had "kind of" considered this when I thought about current flow through the whole circuit with the iPad attached, but I wasn't thinking in terms of pins two and three simply needing the voltage there for the purpose of the iPad merely looking at the voltage. Realizing the charge...
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