Beep, squeek and alert with these 1/2″ piezo discs. Piezo discs flex when voltages are applied, and that flexing can be turned into ‘clicks’ and ‘beeps’. You only need 3V+ to get these going, feed a squarewave in at 440 Hz and you’ve got an A. These piezos are our favorites and go into all our kits. They’ve got long legs so they are easy to plug into a breadboard. For the loudest tones, keep around 2000-4000 Hz. For even louder beeps, invert the squarewave onto both pins to get ‘double’ the volume. They’re great for making an alarm clock!
ALL THIS AND MORE – IN THE PART FINDER!
Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.
Join us every Wednesday night at 8pm ET for Ask an Engineer!
Learn resistor values with Mho’s Resistance or get the best electronics calculator for engineers “Circuit Playground” – Adafruit’s Apps!
Maker Business — Adafruit interviews Dan Rasure, Managing Partner TechShop 2.0
Wearables — Simulate tattoos
Electronics — Heatsinks aren’t enough!
Biohacking — Getting More from Home DNA Testing
Sorry, the comment form is closed at this time.