We set out to build an underwater glider that would essentially have automated movement up and down through the water. This up and down movement was to be controlled with a ballast system created by the push and pull of various syringes. In short, the glider was to rest just above neutral buoyancy with the syringes empty, meaning it would float. Then when the motor pulled the syringes and they filled with water, the glider would dive. Once the glider reached a desired depth, the motor would push the syringes to empty them back out and the glider would rise up. To keep the glider from turning or tipping over, the glider would house an accelerometer attached to a servo holding weight. Whenever the accelerometer (and glider) became off-balanced, the weight would pivot to straighten the glider out. We also added a single, much smaller syringe so that we could obtain water samples at different depths in bodies of water for an environmental studies lab to examine.
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Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.