A 7-segment LED is a great way to display numbers using your Propeller microcontroller. They are made up of eight LEDs in one case. Seven bar-shaped LEDs form the segments of the digit, labelled A through G in the picture below. The eighth one is the decimal point.
There is no need to build circuits on the breadboard for this project. Instead, it takes advantage of the Activity Board WX's 3-pin headers for the servos, and its D/A socket to drive the magnetic speaker.
Propeller I/O pin connections
Have you ever stumbled around in complete darkness, to the point where you stretch your hands out in front of you to avoid tripping over something you can’t see? Well, right now your Boe-Bot is completely blind. We can’t give him eyes just yet, but we can give him a simple form of touch with what we call “whiskers”.
Pairing a Memsic 2-axis accelerometer with XBee RF modules makes a powerful and fun wireless tilt controller for your robot. One XBee module and a Memsic Dual-Axis Accelerometer are mouted on a BASIC Stamp HomeWork Board. The other XBee module mounts on a BASIC Stamp controlled robot. SumoBot wrestling is a perfect application for this!
Need help parking in just the right spot to clear the garage door without tapping the front bumper? Use the PING))) Ultrasonic Distance Sensor to measure the distance to your car, with indicator lights to tell you when to stop. This little project uses the parts in the BlocklyProp Starter Kit.
Visit this simple Propeller C - Simple Devices tutorial to learn how to set up and use the PING))) Ultrasonic Distance Sensor to measure distances to objects, and control LED lights on your Propeller board.
When a street light turns itself on at at dusk, or a camera knows when to use auto-flash, a light-sensing phototransistor may be at work. Let’s try using a phototransistor with the Propeller microcontroller for measuring light levels.
A 7-segment display is a great way to display numbers using your Propeller. You can find these in many products that need to display numbers in a simple way, like clocks, kitchen appliances, or digital scales. This display uses seven LEDs arranged in a special pattern that makes it possible to show any number from 0 to 9. This tutorial will show you exactly how to control the display, and use it to count.
There are three main "environments" within your Robotics Laboratory. Each of these must be kept organized - otherwise you’ll have chaos. Chaos and robots do not go well together.
Environment #1: Hardware
Building robots usually entails working with a wide variety of tools and components. Many problems can be avoided by simply keeping your work area clean and orderly. Among the items that you may be working with are: