The Micro:bit Accelerometer Tone Adjuster. (Image: ME)
This project takes the Micro:bit and lets it change tones as you move it around, using the onboard accelerometer as the variable input. This is sort of like the light Theremins I made in these two projects: basic and advanced.
This time, I just have to use the Micro:bit itself. I also wanted to put the Microbit into something I could hold and move around. Additionally, I wanted to use an amplified speaker.
The software works as follows:
- Power it up, it ready to play tones/music. Press the A button on the Micro:bit to start playing tones. It will play as long as you hold the button down.
- Move the Micro:bit around to hear the sounds.
- Press “B” to change the tone types. Repeat moving it around.
First, let’s gather all the necessary components you’ll need to build this project.
Optional:
Laser cutter to cut the case
Video demonstration of the project:
STEP 1
Load the code onto the Micro:bit.
I am providing the hex file you need to drag and drop onto the Micro:bit, and the python code as two separate files. For the below process, just use the hex file.
Plug the MicroUSB cable into the Micro:bit, and plug the other end of the cable to a PC or MAC.
At this point, you are going to copy over the code to the Micro:bit. I am providing the program (code) in this post that needs to be copied over. When the Micro:bit plugs into a computer, it shows up as a USB flash drive. All you have to do is copy the file over to the Micro:bit, like it’s a USB Flash Drive, and the Micro:bit will reset, and the program is active.
You can remove the Micro:bit from the computer at this point. The program will start running, and without the rest of the circuit, it will not function.
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A little bit about the code:
STEP 2
I like this project a lot, since it doesn’t have a lot of steps and parts. Following is the only wiring you have to do.
Wire up the audio connector.
STEP 3
Optional:
Glue the Micro:bit into the laser cut piece.
STEP 4
Setup
Plug USB 5V power to the Micro:bit.
After this, it will be on and ready to play tones.
- Press the A button on the Micro:bit to start playing tones. It will play as long as you hold the button down.
- Move the Micro:bit around to hear the sounds.
- Press “B” to change the tone types. Repeat moving it around.
Conclusion:
There is a lot of functionality in simple build. All you need is a speaker and a Micro:bit.
