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Changyi

Member Since: February 15, 2017

Country: United States

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http://limerick.pulserain.com

  • I used the previous version of this shield in one of my projects: http://limerick.pulserain.com/2017/07/how-to-build-lego-monster-truck.html

    Now I’m trying to use the new one (DEV-14129) to replace the old one (DEV-09815) for another project. The difference between those two versions are:

    a) The pin assignments are different. The new one uses pin 2 and pin 4 to control the rotation direction, while the old one uses pin 12 and 13

    b) The new one added some LEDs with 1K ohm resistors on the IO pins directly to show signal activity. However, this will cause problems for some Arduino compatible boards, because those boards often support dual voltage IO (3.3V/5V). So the IO outputs are OD (open drain) instead of totem-pole. And the 1K ohm resistor on the new shield will pull the voltage below its threshold. To use the new shield for my project, I have to have those 1K ohm resistors removed.

No public wish lists :(