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I/O Input trip voltage — Parallax Forums

I/O Input trip voltage

VANITYVANITY Posts: 6
edited 2009-12-24 20:38 in BASIC Stamp
Hello,

I'm trying to make a charge controller with a BS2 that will detect when the batteries are empty and fully charged. I'm planning to use a simple voltage divider tuned to trip two BS2 I/O pins at 8.8 V and 11.2 V.

Does anyone know at which voltage the BS2 input pins switch to high?

I'll also be running the BS2 of the very batteries that its regulating and I'm wondering if this may affect the trip voltage.

Comments

  • kf4ixmkf4ixm Posts: 529
    edited 2009-12-24 18:42
    i do believe the pins on the bs2 trip from low to high at 1.2 or 1.3 volts. Anyone please correct me if im wrong.
  • VANITYVANITY Posts: 6
    edited 2009-12-24 20:28
    kf4ixm - Thanks for the intel

    I just did a test with a pot and an analog volt meter and the dial read about 1.5 volts when the input tripped.
    This was with a $15 multimeter from RadioShack so it aint saying much.

    Hopefully Santa gets me a digital multimeter!
  • kf4ixmkf4ixm Posts: 529
    edited 2009-12-24 20:38
    glad to be of help!
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