![]() ![]() "They should neither be used to POWER the chip or as power sources for other things" - except for output elements as LEDs I guess. ![]() there is a voltage drop in the area of 1/2 a volt. Anytime a voltage must cross a semiconductor material "junction". While the title of this document refers to digital pins, it is important to note that vast majority of Arduino (Atmega) analog pins, may be configured, and used, in exactly the same manner as digital pins. This document explains the functioning of the pins in those modes. the reason a voltage drop is expected is because these pins are "wired" through the use of transistors that switch to source or sink from the GND or POWER rails. The pins on the Arduino can be configured as either inputs or outputs. Logic signals have a wide range of what is acceptable as a LOGIC "1" or LOGIC "0" so a pin outputting a voltage between 3V and 5V is STILL a perfectly acceptable LOGIC "1" signal. If I use 9V input, it can output 106.9mA. they should neither be used to POWER the chip (which they can do in a destructive manner parasitically) or as power sources for other things.ĭigital PINS are "designed" to be senders or receivers of logic level "signals". I got to this schematic by going to -> Products -> Uno -> arduino-uno-Rev3-schematic. I think that the most important thing to understand is that PINS are "flexible". ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |