VRRVRR is a visual and haptic metronome, an aid for musicians.
Unlike traditional metronomes, it keeps the tempo by vibrating and blinking its LEDs.
It allows you to type or tap a desired tempo, and store it into one of the four available preset slots.
You can enable accents and beat subdivisions.
![](https://turiscandurra.com/wp-content/uploads/instructions-vrrvrr-1024x614.png)
VRRVRR is made with easily available electronic components. It’s build around an inexpensive and very common keypad matrix, and at its heart there is a Raspberry Pi Pico.
Everything is powered by a lithium battery rechargeable via USB, and there’s a little LED indicator that tells you when it’s time to recharge it.
![](https://turiscandurra.com/wp-content/uploads/VRRVRR-1024x649.png)
![](https://turiscandurra.com/wp-content/uploads/VRRVRR_05-1024x1024.jpg)
![](https://turiscandurra.com/wp-content/uploads/VRRVRR_02-1024x1024.jpg)
![](https://turiscandurra.com/wp-content/uploads/VRRVRR_04-1024x1024.jpg)
![](https://turiscandurra.com/wp-content/uploads/VRRVRR_03-1024x576.jpg)
You can find the source code and the BOM at github.com/TuriSc/VRRVRR .