2 layers34.9 × 82.6 mm
Robot
AF-ROBOTICS/RoboticsLearningPlatform
A learning platform for various Electrical and Computer Engineering concepts and techniques.
37 parts3
2 layers34.9 × 69.2 mm
A learning platform for various Electrical and Computer Engineering concepts and techniques.
- Size
- 34.9 × 69.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 18
- Pads
- 77
- Tracks, vias
- 172, 6
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 10 Jan 2019
- Updated
- 28 Jan 2022
Overview
Robot is an open-source printed circuit board by AF-ROBOTICS, from the AF-ROBOTICS/RoboticsLearningPlatform repository on GitHub. It is a 2-layer board of 34.9 × 69.2 mm with 28 parts on 18 nets, routed with 172 tracks and 6 vias.
It is built around the L7805 and L78L33ACU. Its parts include 8 connectors, 5 capacitors, 5 resistors, 2 ICs and 2 transistors. It belongs with the robots and motor control boards of this library.
Main components
2
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
L78L33ACU
SOT-89-30℃~+125℃@(Tj) 1 1.7V 100mA 3.3V 30V 40uV 49dB@(120Hz) 6mA Fixed Over Current Protection、Over Temperature Protection、Short Circuit Protection Positive SOT-89-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
readme.mdDFEC Robot
The DFEC Robot was created for the Department of Electrical and Computer Engineering (ECE) at the US Air Force Academy. It is used to teach ECE fundamentals in the major's introductory course. The robot's chassis is built using 3D printed parts. An Arduino Uno Rev3 microcontroller board and a custom designed power and motor controller Printed Circuit Board (PCB) are used to control the robot.
Labs
Six labs guide the students from soldering the PCB and assembling the robot to using distance and line sensors to guide the robot through a maze.
Robot PCB - This lab guides students to solder and test their PCB.
Robot Build - This lab provides instructions to assemble the robot.
Robot Motors - This lab investigates how the Arduino uses Pulse Width Modulation to drive the robot's motors.
Robot Drive - This lab has students control the motors to drive in specified patterns.
Robot Line Following - This lab integrates the Pololu QTR-8RC Line Sensor Array to enable the robot to follow a black line.
Robot Wall Following - This lab integrates the Sharp GP2Y051SK0F 2-15 cm Analog Distance Sensor to enable the robot to follow walls.
Robot Maze - This lab is broken up into three parts: 1) follow a line through a maze; 2) follow a line through a maze and turn around and return to the start of the maze; and 3) navigate a walled maze towards a goal location.
Libraries
There are two custom libraries used to control the robot. These libraries should be copied into library folder at root/Documents/Arduino/libraries.
Motor - This library provides functions to drive the robot using left and right PWM values (e.g., Motor_Init(), Motor_Forward(int leftDuty, int rightDuty), and Motor_Stop())
QTR-8RC - This library is adapted from the QTRSensors library to utilize the QTR-8RC Reflectance Sensor Array to determine how far the robot is off a line.
Projects
There are several projects that incorporate the DFEC Robot into different systems. All of these are works in progress and need to be updated to utilize the new libraries.
Hardware
3D Printed Chassis
Frame developed using AutoDesk Fusion 360 and printed on a LulzBot Taz 6.
Base layer
| Top | Bottom |
|---|---|
 |  |
Motor layer
| Top | Bottom |
|---|---|
 |  |
Arduino layer
| Top | Bottom |
|---|---|
 |  |
Additional Layer
| Top | Bottom |
|---|---|
 |  |
Wheels
Printed Circuit Board (PCB)
 |  |
Motor
Sharp GP2Y0A51SK0F Analog Distance Sensor 2-15 cm
QTR-8RC Reflectance Sensor Array
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | Mounting_Holes:MountingHole_2.2mm_M2 | , , , | |
| 4 | 10k | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R4, R5, R6 |
| 3 | 0.1uF | Capacitors_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C1, C2, C4 |
| 2 | 2N3904 | TO_SOT_Packages_THT:TO-92_Inline_Narrow_Oval | Q1, Q2 |
| 1 | Symbols:OSHW-Logo_5.7x6mm_SilkScreen | ||
| 1 | 10uF | Capacitors_THT:CP_Radial_D5.0mm_P2.00mm | C3 |
| 1 | 330 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 33uF | Capacitors_THT:CP_Radial_D5.0mm_P2.00mm | C6 |
| 1 | BATT | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J4 |
| 1 | L7805 | TO_SOT_Packages_THT:TO-220-3_Horizontal | U2 |
| 1 | L78L33 | TO_SOT_Packages_THT:TO-92_Inline_Narrow_Oval | U3 |
| 1 | M1 PWR | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J1 |
| 1 | M2 PWR | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J2 |
| 1 | MA CTRL | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J12 |
| 1 | MB CTRL | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J11 |
| 1 | PWR | LEDs:LED_D3.0mm | D1 |
| 1 | PWR | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J7 |
| 1 | Power Connector | Pin_Headers:Pin_Header_Straight_2x05_Pitch2.54mm | J3 |
| 1 | TB6612_Motor_Driver | bob:Pololu_TB6612 | J5 |
Questions
How big is the Robot PCB?
It measures 34.9 × 69.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Robot use?
28 parts, built around the L7805 and L78L33ACU. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Robot KiCad files?
From the AF-ROBOTICS/RoboticsLearningPlatform repository on GitHub, at the commit this page was made from: the board is PCB/pcb_v2/_Archive/pcb_v1/robot.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Robot design in my own project?
Its repository states no licence, so its author keeps all rights: ask AF-ROBOTICS before reusing the design.
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