Piezo Element Amplifier for Guitar and Violin
https://www.electronics-lab.com/piezo-element-amplifier-for-guitar-and-violin/
The board presented here is a preamplifier for contact microphones that are used for amplifying the sound of musical instruments which do not contain electrical pickups, such as guitar and violins. Most contact microphones use a piezo element to convert vibration in the body of the musical instrument to a voltage. The circuit is built […]
Maxim Integrated MAX77501 Piezo Haptic Actuator Boost Driver
https://www.electronics-lab.com/maxim-integrated-max77501-piezo-haptic-actuator-boost-driver/
Maxim Integrated MAX77501 Piezo Haptic Actuator Boost Driver is a high-efficiency controller driver for piezo haptic actuators. The driver is optimized for driving up to 2µF piezo elements. It can generate a single-ended haptic waveform of up to 110VPK-PK amplitude from a 2.8V to 5.5V input power supply or a single-cell Li+ battery. Memory playback and […]
Firefly – an annoying little thing
https://www.electronics-lab.com/firefly-annoying-little-thing/
Here’s a tiny pcb that produces an annoying sound using a piezo buzzer and a ATtiny13 microcontroller. It uses an LED, piezo buzzer, ATTINY13 Atmel microcontroller, a very small amount of Arduino code, and a coin cell battery that should last about a week. Battery life could be improved, with longer sleep times. The device […]
Arduino Proximity Alarm
https://www.electronics-lab.com/arduino-proximity-alarm/
Lucas Reed @ instructables.com has build a proximity alarm using Arduino and an ultrasonic sensor from Parallax. If a nearby object is approaching then the alarm will sound and an RGB LED will light up. He writes: An ultrasonic rangefinder and Arduino microcontroller will check for nearby objects and if need be, alert you with […]
Piezoelectric motor demo
https://www.electronics-lab.com/piezoelectric-motor-demo/
Quick demonstration of a piezoelectric motor from www.pcbmotor.com Piezoelectric motor demo – [Link]