Arduino Ultrasound Tremolo and Theremin Pedal

This is a tremolo pedal controled by distance the closer, the higher the frequency thesound cuts off. plug an instrument and have fun.

You don't have an instrument ? in a flick of a switch now it is an ultrasound theremin the closer you , the higher the frequency.

Component needed
- arduino uno

- HC-SR04

- relay SRD

- 2 X female jack 6.35 mm

- dpdt switch

- some wire and jumper cable

- and a case

inspired by :

https://curiousmotor.blogspot.com/2017/06/diy-moti...

https://www.instructables.com/Ultrasonic-Theremin-...