Using the getElementsByClassName() method in JavaScript
The getElementsByClassName() method returns an array of elements in a document that have a class name of a value we specify when using the method. It can be used to manipulate more than one …
Measuring soil moisture with an Arduino
In this activity, we will use a soil moisture sensor to keep track of the amount of water in the soil surrounding plants so we can know when the soil …
Controlling a servo motor with an Arduino
Servo motors are motors that can be used to rotate parts of machines with precision. Small servo motors can be directly connected to an Arduino microcontroller board to control the position of …
Adjusting the brightness of an LED
LEDs can be switched between HIGH (on) and LOW (off) states when they are connected to the Arduino’s digital pins. However, digital output can only be in either of two …
Using an ultrasonic sensor with Arduino
In this tutorial, you will learn how to connect an ultrasonic sensor (HC-SR04) to an Arduino. An Ultrasonic Sensor is used to measure distance. It emits ultrasound at 40,000 Hz (40kHz) which travels through the …
Using a push button (switch) to control an LED
In this tutorial, we will use a push-button (switch) to turn an LED light on and off. You will need the following: Arduino Uno microcontroller board Breadboard LED light Push …
The forEach loop in JavaScript
This tutorial introduces the forEach loop in JavaScript. The forEach loop can be used to easily call a function once for each element in an array. As the loop works through …
Practice Onshape CAD Exercise 1: Coffee mug
This practice Onshape exercise involves using the following tools to create a 3D coffee mug: Sketch tools (circles, arcs) Extrude Fillet Sweep Shell Appearances The coffee mug created in this …
Removing surfaces with the Shell tool
This tutorial explains how to use the Shell tool to remove surfaces from a shape or “hollow out” shapes. The two examples below involved using the Shell tool to create a …
Using the Rib tool in Onshape
This tutorial explains how to use the Rib tool in Onshape to add ribs or supports to your 3D models, like in the example below. Watch the video below to …
Using the Draft tool in Onshape
This tutorial explains how to use the Draft tool in Onshape to add draft angles to one or more selected faces on a 3D shape, like in the examples below: Watch …
Using the Thicken tool in Onshape
This tutorial introduces the Thicken tool in Onshape which can be used to take a surface in an open shape and thicken it. The thicken tool is useful for shapes …
How to fillet and chamfer in Onshape
This tutorial explains how to use the Fillet and Chamfer tools in Onshape. The Fillet tool allows you to create rounded corners or edges on a 3D shape whereas the …
JavaScript array methods
This tutorial explains how to use the following array methods in JavaScript: push() to append elements to the end of an array pop() to remove the last element from an array …
Calling functions from events in JavaScript
This tutorial explains how to call functions from an event on a web page using HTML and JavaScript code. In the examples in the video, a function written in JavaScript …