Mini Violin Badge
This is a tiny electric violin powered by an 3V CR1220 battery and controlled by an ATtiny85 microcontroller. It uses a piezoelectric buzzer to make sounds when the four strings are touched. It does this by reading random values through an analog pin connected to the strings.
It also features two side view LEDs on the back which are meant to shine through the PCB to light up the two F-hole symbols of the violin when sound is played.
It also has a push-button for turning it on/off when long presse or for switching through different songs or functioning modes (preset songs, light only or sounds based on values read through the strings).
I also added two pads to which sewing hooks can be soldered, so the PCB can be also used as a badge.
Mini Violin Badge
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Raspberry Pi 5 7 Inch Touch Screen IPS 1024x600 HD LCD HDMI-compatible Display for RPI 4B 3B+ OPI 5 AIDA64 PC Secondary Screen（Without Speaker）
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