Making a custom digital Car Horn #AudioFX @Instructables @Hackaday
Tom Hammond has whipped up a custom car horn capable of playing a wide variety of sounds.
This Instructable will help you build a digital horn for your car! It will play up to 83 sound effects/clip using a small control pad of 11 buttons. Three of the buttons are dedicated to “favorite” sounds, while the remaining eight buttons represent sound “categories” that store 10 sounds each. Each press of these latter buttons will play a random sound from that category.
Note: This project isn’t limited to car horns! It can be added to toys, bicycles, motorcycles, kids’ riding vehicles, and anything else that needs sound effects. The control pad is relatively small and can fit anywhere.
The heart of the system is the Adafruit Audio FX board. There is no programming involved; simply connect the board to your computer via a micro USB cable and it turns into a flash drive. Copy OGG audio files to it (it’s easy to convert to OGG from MP3 or WAV) with a particular naming convention that will match the buttons on the control pad. This is explained more later on.
The Audio FX board is powered with a micro USB cable and outputs sound via a 3.5mm jack. This is fed into an inexpensive 120W amplifier that supports one or two horns. The horns are 5″ 15W PA-style horns, easy to fit into an engine compartment. One horn has decent volume, but I installed two horns for a bit more loudness.
8-6-2021 (August 6, 2021) is the Snakiest day of the year and it’s also this year’s CircuitPython Day! The day highlights all things CircuitPython and Python on Hardware. See you there!
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.