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Prop-1 board

Learning from scratchLearning from scratch Posts: 14
edited 2005-11-26 03:41 in BASIC Stamp
Any one maybe give me a tip on why the output terminal strip don't have an output, the pins show the program is running and the switch is at number two position and there is the supply voltage on the strip.· Thank you so much.

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Old redneck hillbilly born and raised on a redwood stump

Comments

  • Jon WilliamsJon Williams Posts: 6,491
    edited 2005-11-26 03:26
    The Prop-1 output terminals actually switch to ground when active. What this means is that you can connect a device (solenoid, relay, etc.) between V+ and an OUTx terminal. When the power switch is in position 2, V+ will be available and you'll be able to control the external device.· The reason for this is that the output actually goes through the ULN2803, a Darlington sink·driver.

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    Jon Williams
    Applications Engineer, Parallax
  • Learning from scratchLearning from scratch Posts: 14
    edited 2005-11-26 03:41
    Thank you Jon, without your help my displays would not be near as nice.

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    Old redneck hillbilly born and raised on a redwood stump
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