Add a Phono Horn to Your Crystal Radio (or Any Piezo Speaker Project!) for Audio Amplification
These crystal and piezo mini radios look fantastic, especially with the addition of the metallic-finish paper phono horns courtesy of Rob Ives’s website – download the horn and dock design here and add it to your own audio project!
Web site subscriber Josef from the Czech Republic sent through these pictures of his amazing project. He is working with his class to produce crystal sets – a simple radio. The sound output from the piezo speakers is low so to maximise audibility – and to make them look awesome – he has added the Phono Horn from the plans on this site.
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, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, 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.