By Martin Diaz (Project Manager) Edgardo Villalobos (Solar – Design and Manufacturing Engineer) Anthony Dunigan (Chassis – Design and Manufacturing Engineer) Renpeng Zhang (Electronics and Control Engineer) Abdullah Albelbisi (Missions, Systems, and Test Engineer) Table of Contents Executive Summary By Martin Diaz (Project Manager) Program Objective 1. Articulating custom solar panels which are able to […]
By Renpeng Zhang HC-SR04 range test Table of Contents Table Range HC-SR04 was tested Code /* * HC-SR04 testing code * Connect Vcc to 5V * Connect Gnd to Gnd * Connect Trig to pin 9(PWM) * Connect Echo to pin 10(PWM) */ // defines pins numbers const int trigPin=9; const int echoPin=10; […]
By Renpeng Zhang Chassis Schematic Schematic Description For the chassis eagle schematic, I choose to use two PCA9685 I2C expanders because one doesn’t have enough PWM pins for all our needs. We also used six VNH2SP30 motor driver for our motors. We use the PWM input from the I2C to the PWM pin in the […]
By Edgardo Villalobos Wire layout out for the solar panels. Table of Contents Top View Bottom of panels 1. 2. 3. Top Level
By Anthony Dunigan Back of the envelope calculations for wheels and electronic slip differential. Table of Contents Requirements Level 2 Requirements In order for the project to move forward in our Level 2 requirements numbers 8 and 9. We need to gather calculations based on our 6 in (0.0762m) wheel diamater. Constants and Variables r […]
(Written By: Edgardo Villalobos – Manufacturing/Solar Panel) Using INA3221 current sensor breakout boards to measure current and voltage of a battery. INA3221 current sensors will be implemented in project to isolate voltage of each solar cells. Table of Contents Overview This project requires current sensors in order to measure the current running through the solar […]
By Renpeng Zhang Demoing control of a stepper motor. Table of Contents Overview In this demo, I tested the 28BYJ-48 stepper motor with the ULN2003 stepper motor driver. I used one Arduino for the control of the stepper motor. Since it’s recommended to use an external power source, I just used another Arduino solely for […]
By Edgardo Villalobos Calculations to find what voltage and current the solar cells need to provide to charge the battery in 8 hours. Table of Contents Voltage Battery Solar Panels need to be able to charge a 12-Volt, 7-Ah (10-Ah) battery Rule of thumb Rule of thumb: Solar Panel Voltage = Battery Voltage x 1.5 […]
By Edgardo Villalobos Study on types of solar cell encapsulation. Table of Contents PLEXIGLASS Plexiglass provides a lightweight, about 3 lbs per 8 sq. ft. with a 0.065 thickness, anti-reflective surface and is classified as a scratch resistant surface. Although plexiglass is virtually impossible to break and scratch resistant, it can scratch much easier […]
By Renpeng Zhang Fritzing Diagram for Chassis. Diagram Description Based on the interface definition, I created the fritzing diagram for the chassis part of the pathfinder. It consists of the Arduino Leonardo with two HC-SR04 ultrasonic sensors. It has the HC-05 bluetooth module connected to the Arduino through the TX and RX pins for the […]