HALLTAPE_V(curvimeter)

An opisometer, also called a curvimeter, meilograph, or map measurer, is an instrument for measuring the lengths of arbitrary curved lines. And I developed a cheap digital version of that all process I posted on my Instagram https://www.instagram.com/artur_rocker/

3D printer

Encoder

Arduino pro/pro mini

TM1637 display

Button

LiPo battey

TP4056

Switch

3 parts that are 3d printed

Body

Cap

Wheel(attached to encoder later)

Thingiverse download link

https://www.thingiverse.com/thing:5506274

Soldering everything as shown

P.S-if hall tape works strange you can swap(or by soldering or by changing the code) the encoder pins and try again o

just download the sketch and upload it to arduino