On October 1st, we began work with analog signals! Here's the quick overview of digital and analog signals The Arduino can read digital inputs and write digital outputs. In other words, we can use a digital pin to sense electricity coming through from our circuit, and send electricity through a pin to our circuit. So far, we've only been writing (sending) to digital pins (with the digitalWrite function) to light LEDs. We haven't done anything with reading digital signals yet. Also, keep in mind that digital signals are either HIGH or LOW, ON or OFF, 1 or 0. They only have two values. Analog signals can have a range of values, not just two, like with digital signals. The Arduino can only read analog signals in the circuits we build, and only with the special analog pins on the opposite side of the board from the digital pins. We'll start using analog signals to respond to more human input, such as force and light sensing! Our servo experiment didn't kick off as we'd liked; many people's servos weren't working. We figured out it was important that the wires that connected to the servo are really snug, but we'll have to experiment with that. Will built an awesome prototype-robotic arm using servos. We'll hopefully post a video of that in action on the blog, and make more of them that can do awesome things. This Thursday, October 8th, we will continue experimenting with servos, and start with capacitive touch sensing. Smartphone touch screens use capacitive sensing to sense human touch, and we can mimic that behavior with the arduino to control some awesome things. |
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AuthorsRam Goli Archives
November 2015
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