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question on power supply to stamp — Parallax Forums

question on power supply to stamp

tedbeautedbeau Posts: 48
edited 2008-02-13 20:48 in BASIC Stamp
I notice that most or all of the designs for project boards for the stamp have a reset switch and use a 9 volt battery plugged into the board. What puzzles me is the fact that there is not a power switch to turn off the battery power to the stamp. Is it OK to be making changes to the breadboard while the stamp has power to it? Does everyone unplug the 9 volt before making changes. Maybe I'm missing something but wouldn't an off switch be a good idea.
What about when your program has run and has "End" ed, does the stamp continue to draw energy and waste power while it waits for a reset button press?

Ted
·

Comments

  • PJAllenPJAllen Banned Posts: 5,065
    edited 2008-02-12 23:47
    I don't know about "everybody", I think that it's best practice to power down before making changes because·little slip-ups can have big consequences.· What's the rush?

    I think the BS2 HomeWork Board doesn't have a power switch because they wanted to keep the price down.· The Board of Education (BoE) has a power switch.
  • tpw_mantpw_man Posts: 276
    edited 2008-02-13 01:47
    PJ Allen is correct. The BS2 HomeWork board does not have a power switch.

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    I am 1010, so be surprised!
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-02-13 20:48
    In the cases where the battery is not removed, simply downloading the following program prior to changing any wiring will ensure all I/O pins are in Hi-Z mode and that the BASIC Stamp is in sleep mode. Take care.
    ' {$STAMP BS2}
' {$PBASIC 2.5}
end

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    Chris Savage
    Parallax Tech Support
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