VEX LIMIT SWITCH ROBORIO HOW TO
VEX LIMIT SWITCH ROBORIO DRIVER

First, they were the only available motors that integrated with the square shaft required for the omni-wheels without the need to jury-rig a shaft adapter. We chose theВ Vex 2-wire motor 393 as our robot's main motors for movement for two main reasons. circuit is always closed until limit switch is pressed, causing the circuit to open), and would then read a low input instead. We chose to use the NC and C terminal such that the Arduino would always read a high input until the limit switch was pressed (i.e. The вЂњnormally closedвЂќ (NC) terminal of the limit switch was connected to the 3.3V source of the Teensy, while the вЂњcommonвЂќ (C) terminal was connected to an Arduino pin, which was then connected to a 10kО© pull down resistor (i.e. We opted to use fourВ limit switches, one on each side of the robot, because they wereВ much easier to integrate mechanically and electronically. This left us to decide between ultrasonic sensors and limit switches. Tape sensors were not needed since our strategy required not following marked lines on the arena but rather the walls. We initially wanted to implement IR sensors but were not able toВ amplify the signal enough and were spending too much time on it that it began to detract from working on other parts of the robot. Tape sensors for the robot to follow the black tape in the arena to get from the Throne Room to the Armoury IR sensors to sense the IR beacons mounted onВ two of the towers and the Dragon There wereВ severalВ available sensors thatВ could have been implemented such as:

VEX LIMIT SWITCH ROBORIO DRIVER

Connecting all the motor driver outputs alone directly to the Arduino required 8 I/O pins, but using the shift register minimized this to just 3 I/O pins subsequently increasing the number of I/O pins that couldВ connect other components. This minimized the number of pins we needed to use in our Arduino as well asВ allowedВ for neater wiring. Our 8-bit, SIPO (Serial-In-Parallel-Out) shift register controlled eight separate outputs while only requiring three inputs from the Arduino. Ultimately, what this allows us to do is control multiple outputs from the shift register.

The 'flip-flops' are connected so that output is the input of one so on each clock pulse, the shift register's contents shift either left or right by one bit. They are made up of smaller parts called 'flip-flops' that each control one bit, move between 0 and 1 states, and are all connected to the same clock. However, using just one Arduino would not be possible without the inclusion of a shift register.ДЄ shift register is a type of sequential logic circuit commonly used for data storage or data movement. This Arduino was powered off a 5V line from one of our L298N motor drivers.

VEX LIMIT SWITCH ROBORIO HOW TO

This started with figuring out how to create the robot's 'Brains.' All of our WARRIOR's movement, sensing and control is managed by a single Arduino Teensy LC.

While designing the electrical system of our robot, we wanted it to be as simple as possible to allow us to test quicker and find problems easier.

Vex limit switch roborio