Eurorack stomp box tuner
![](https://useless.blue/media/posts/1/IMG_20190525_230700.jpg)
I've got the idea that a tuner for my modular synthesizer would be nice. And the cheapest route in my mind would be to convert a guitar pedal tuner. So I bought the cheapest one I could get. When the glorious Harley Benton CPT-20 arrived at my home, the journey began...