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Small-scale Nano setup with pullup inputs and CR2032 batteries

Arduino TeamMarch 20th, 2019

Arduino boards are used in a wide—massive even—variety of projects. Sometimes, however, all you need is something to give your project the ability to blink an LED, sound an alarm, or accomplish some other simple task. 

For this purpose, maker Jeremy S. Cook has developed a sort of standard method for using these devices, with a 4-position DIP switch soldered to inputs D9-D12, and a double-CR2032 battery pack attached with shrink wrap.

This standardization makes for a very compact setup that can be implemented in a project very quickly. The configuration also highlights the use of “INPUT_PULLUP” in Arduino code, with switches wired to ground. Cook’s technique avoids floating inputs without the need for external resistors.


One Response to “Small-scale Nano setup with pullup inputs and CR2032 batteries”

  1. Hacino Says:

    I need a lot of information about this shot. If you have enough time to help you get more information

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