MIT App Inventor Overview

Springless Suspension

• Springless suspension is a type of vehicle suspension system.

MIT App Inventor

• MIT App Inventor is a visual programming environment.
• It allows creation of Android applications using a drag-and-drop interface.
• Developed by the Massachusetts Institute of Technology (MIT).
• Aims to democratize app development by lowering barriers for students, educators, and prospective developers.

Why MIT App Inventor?

• No coding experience is needed.
• Visual Programming: Uses visual blocks to represent programming concepts, making it easy to learn and understand
• Instant Gratification: Allows immediate results as one designs and tests apps in real-time while connected to an Android device.
• Languages used in MIT App inventor: The most popular languages include JAVA (76.3%), HTML(12.1%), JAVASCRIPT (6.4%), PYTHON(2.7%), SCHEME(1.3%) and CSS (1.2%).

Designing App Interface

• The app interface is designed by dragging components from the palette to the specified viewer.
• Using the designer button, allows navigating to the designer tab.
• Components can be selected in the components list, and their properties changed (e.g., color, size, and behavior).

Arduino

• Arduino is an open-source, microcontroller-based platform.
• Popular as an educational tool in many universities globally.
• Enables the introduction of automation control concepts to students.
• Uses Arduino Integrated Development Environment (IDE) as its software.

Arduino IDE

• This software consists of a text editor for code writing, message console, message area, toolbar for common functions, and various menus.
• The IDE allows communication and uploading programs to the hardware.

Arduino IDE Code for NodeMCU

• Code written in Arduino IDE can be used to control NodeMCU.

Setting WiFi Name & Password

• Code examples demonstrating how to set WiFi credentials.

NodeMCU SPI Pinout

• NODEMCU is a System on a Chip (SoC) designed for open-source IoT platforms.
• Uses ESP8266 WiFi.
• Enables WiFi connectivity for devices.

Analog to Digital Converter (ADC)

• Converts analog signals to digital form.
• ESP8266 has an inbuilt 10-bit ADC with a single channel.
• Input voltage range from 0-1.0V.
• Used for receiving analog information from external sensors.

NodeMCU PWM Pins

• Pins used to generate pulse width modulated signals.
• PWM is a method for controlling the width of a pulse while maintaining a constant frequency.
• Used in various situations like motor speed control and light dimming.
• Frequency adjustable up to 1KHz.

H-bridge

• An electronic circuit that controls the direction of current flow through a motor.

Basic principle

• Illustrates principles of motor control using magnetic fields.

Forward-Clockwise, Backward-Anticlockwise, Power Braking

• Shows different ways of controlling motor direction (forward-clockwise, backward-anticlockwise, braking) with a circuit diagram.

Motor Drive Circuit

• Illustrates a motor drive circuit using PMOS and NMOS transistors for controlling a motor.

Assembly of Springless Suspension

• Shows connection diagram for NodeMCU, Motor Driver, and other components of springless suspension assembly.