It's actually a "recorder", but this project will allow it to make sounds like a flute, recorder, or even weird space noises. Kids love this project!
We'll turn a $1.00 recorder into an electric instrument complete with breath "blow" sensor!
A Propeller Platform running some synthesizer code provides the sound for this fun instrument.
You'll have a choice of converting the instrument to become fully electronic, or adding synth features to the existing instrument.
Here's what you'll need
* A Propeller Platform (Gadget Gangster)
* A Protoplus Module (Gadget Gangster)
* Five 10K resistors (Radio Shack)
* Four Tact switches (Radio Shack)
* A Piezo Transducer (Radio Shack)
* Some wire (Radio Shack)
* A toy recorder (Local Discount Store)
* A soldering iron & hot glue gun
We are going to create two different circuits for our instrument. (Picture 2)
The switch circuit for our four tact "finger" switches, and a piezo circuit for our breath "blow" sensor.
Step 1: Connecting Cable
In my version of the project, I used some twisted pair network cable with the ends cut off.
* Note: if you use twisted pair cable as I have, you will want to reduce the resistors on the tact switches from 10k to 1.2k as the cable will have some internal resistance of it's own.
Step 2: Child's Recorder
I found this one for $1.00 at the local Dollar General
Step 3: Recorder+ OR Fully Electric Instrument
At this point, you've got a choice...
1) Recorder+ You could attach the tact switches between the finger holes of the recorder. Doing this will allow the recorder to work as it was designed with the switches being available for electric sounds and effects.
2) Fully Electric Instrument In our design, I filled each of the finger holes down the front of the recorder with hot glue, then attached the tact switches over four of the original holes.