Answers to Robotics Exercises

Let’s see how you did! If you didn’t get a few of these, don’t let it stress you out – it just means you need to play with more experiments in this area. We’re all works in progress, and we have our entire lifetime to puzzle together the mysteries of the universe!

Here’s printer-friendly versions of the exercises and answers for you to print out: Simply click here for printable questions and answers.

Answers:
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1. Connect the LED, motor, and buzzer in parallel (plus to plus) and they should all work.

2. Add a second battery pack to your circuit.

3. A DPDT switch allows you to reverse the motor direction by reversing the flow of electrons.

4. Yes – they both use the same circuit, including the motor speed control circuitry. They both need to control the speed and direction of the motors, and the electrical circuit doesn’t care whether you have a mirror or propeller on your motor shaft.

5. The sponge separates the foil, breaking the circuit open. When you squish the foam, the foil pieces touch and your light bulb lights up.

6. The trip wire is a NC (normally closed) switch.

7. I’d add headlights (LEDs), horn (buzzer), and wired remote control. How about you?

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