Test the IR Sensor Circuits
The test code displays the state of each IR detector: 1 = no infrared reflection detected, 0 = yes, infrared reflected from an object is detected. Before continuing, make sure that both sides can reliably detect objects.
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Activity 1: Build and Test the Whiskers
Remember subsystem testing? First, we’ll build the whiskers circuits and write code to check their input states before using them in navigation sketches.
Activity 1: Build and Test the Object Detectors
In this activity, you will build and test infrared object detectors for the BOE Shield-Bot.
Parts List
(2) IR receivers
(2) IR LEDs (clear case)
(2) IR LED shield assemblies
(2) Resistors, 220 Ω (red-red-brown)
(2) Resistors, 2 kΩ (red-black-red)
(misc) Jumper wires
Activity 2: Build and Test LED Indicator Lights
Indicator lights give people a way to see a representation of what’s going on inside a device, or patterns of communication between two devices. Next, you will build indicator lights to display the communication signals that the Arduino will send to the servos. If you haven’t ever built a circuit before, don’t worry, this activity shows you how.
Build the Caroler
Build the Circuit
Figure 1 is the schematic and Figure 2 shows the parts placement for this circuit.
- Build your circuit as shown below.
Figure 1 - Christmas Caroler Schematic
Figure 2 - Christmas Caroler Wiring Photo
Circuit Practice with BlocklyProp
Learn to build simple circuits on a Propeller Activity Board or breadboard with a Propeller FLiP module. Create BlocklyProp graphical programs for blinking LEDs, controlling LEDs with pushbuttons, playing notes on a piezo speaker, and more. You will be building real-world STEM skills!
Propeller C - Simple Circuits
Build simple circuits on the Propeller Activity Board, and write Propeller C programs to interact with them. Blink lights, beep a speaker, measure voltage, and more.
Heart Rate Measurement Circuit
Ever wondered how your fitness tracker is able to measure your heart rate? Learn how build a finger-clip device to observe and measure your heart rate using LEDs and a light sensor.
Build the QTI Line Follower
Each QTI sensor is connected to a post that is mounted on the underside of the chassis. This positions the sensors right above the ground surface.
- Assemble the QTI sensors and mount them to the underside of the ActivityBot chassis:
Wire Up and Test the Board
Schematics and Building the Circuits
Figure 1 below shows the schematic for the Magic BS2 board, and Figure 2 displays the optional mounting bracket assembly for the LCD display.
Figure 1 – Magic BS2 Board Schematic