Introduction
Connect a 360˚ Servo to a Bit Board and control it with a Pushbutton and code.
We'll explore code to control the movement of a continuous rotation (360 degree) servo motor using a button.
Video Overview
Featured Document
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The 360 Degree Servo Motor has a 3-wire connector on the end that can plug directly into the pins on the back of the Bit Board.
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Make sure the Orange Wire is closest to the number 13 for the Pin 13 column.
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Then the Brown Wire should be closest to the micro:bit (in the - row) and the Red Wire will be in the middle (the +5v row).
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Connect the Button with Maker Tape, with one side to Pin 5 and the other to GND.
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If you've never used a micro:bit before you'll want to check out this guide: Bit Board V2 Setup and Use
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We're going to load the following code for our 360 Servo Button Slow Spin program: https://makecode.microbit.org/_Mp0MW2EKP...
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We'll get our button all set in the start block by setting it to up so when the button is shorted to GND (ground) or "pulled down" we can read the state.
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In the forever block we check for the button to be pressed, and when that happens we spin the servo on Pin 13 at a speed of 15%.
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When the button is not being pressed (and held down) we'll stop the servo with the turn off motor statement.
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Once the code is loaded it should start running immediately, but nothing will happen until we press and hold the button!
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You can power the micro:bit via the USB cable you used to load the code, but now that we are using servos we recommend using a battery pack plugged into the Bit Board.
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The Blue Pins on the Bit Board provide extra power (5 volts instead of 3 volts) by boosting the voltage coming from the battery pack. This helps improve servo performance, especially with multiple servos.
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When you press and hold the button the servo will spin slowly. When you release the button the servo will stop moving.
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Follow along with our recorded Live Stream!
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You can watch the full video of us walking through this project, along with explaining and exploring the code: https://youtube.com/live/HcgJlJ8a2KI
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