Quantity   Component name
1 × Arduino Uno
1 × Case for Arduino Uno https://uk.rs-online.com/web/p/cases-for-arduino/1442602?cjevent=e0dd20ea52969c3dd27ec3c13903c327f7c0123a05330ec6c&cm_mmc=UK-CJAFF-_-Genie+Shopping+CSS-_-RS++RS+Components+UK
1 × 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
1 × Toggle switch https://thepihut.com/products/mini-panel-mount-spdt-toggle-switch
1 × LED https://thepihut.com/products/ultimate-5mm-led-kit
1 × 330 ohm resistor https://thepihut.com/products/ultimate-resistor-kit
1 × Push button Optional - for momentary activation. https://thepihut.com/products/16mm-panel-mount-momentary-pushbutton-green?variant=27739426833¤cy=GBP&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gclid=CjwKCAiA4KaRBhBdEiwAZi1zzvrHVWROYD8KQEZOfAPVn6YgZktcQw_YEmn60hoE7nCWhWxNp1xoBxoC-b8QAvD_BwE