Quantity   Component name
1 × Arduino Mega (or Due)
1 × Project box
4 × BNC connector https://uk.rs-online.com/web/p/coaxial-connectors/5464910A
2 × Rotary selector switch https://thepihut.com/products/adafruit-mini-8-way-rotary-selector-switch-sp8t?variant=27740218769¤cy=GBP&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gclid=CjwKCAiA4KaRBhBdEiwAZi1zzrKCelYT2N7uh2hvsWl55ODZH_K5wGH5cg9echPnoGS71ykyuSPxXRoCowcQAvD_BwE
2 × Potentiometer knob https://thepihut.com/products/slim-metal-potentiometer-knob-10mm-diameter-x-10mm-t18
4 × Toggle switch https://thepihut.com/products/mini-panel-mount-spdt-toggle-switch
4 × LED https://thepihut.com/products/ultimate-5mm-led-kit
1 × 330 ohm resistor https://thepihut.com/products/ultimate-resistor-kit
4 × 10K linear potentiometer (optional) https://thepihut.com/products/panel-mount-10k-potentiometer-breadboard-friendly?variant=27740444817¤cy=GBP&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gclid=Cj0KCQjwyMiTBhDKARIsAAJ-9VurBKd_HpATwBi9hhoMeWuKnCI1vK-lLx0qEnsR9KuVTeY0zyGxWHkaAptQEALw_wcB
4 × Potentiometer knob (optional) https://thepihut.com/products/slim-metal-potentiometer-knob-10mm-diameter-x-10mm-t18
6 × M3 screws and nuts
6 × Spacers