Hello Homesense, and welcome to Letterkenny. My name’s Gareth Ladley and for the past few weeks I’ve been working on a coaster that flashes lights and reminds me when to take my cup of tea. I’ve a tendency to sit too long at a computer and my eyes start to hurt and I don’t take the required tea break. So – there’s a lid and a base that I printed up on the 3D printer, and the components on the inside. Round the outside are four LEDs and a button in the centre; and it’s all connected to the Arduino. So when the lid’s snapped into place and it’s powered up a light will come on. When the cup’s put onto the coaster the lights will start flashing to recognise that there’s a cup on it, and then will stop. After an hour the lights start flashing again to remind me to get up and take a break. It’s as simple as that and I hope you find it interesting!