Live updates, video and analysis from Alexandra Palace as Luke Littler looks to go back to back at the World Darts Championship against Gian van Veen; watch live on Sky Sports' dedicated darts channel ...

Live updates, video and analysis from Alexandra Palace as Luke Littler looks to go back-to-back at the World Darts Championship; watch every match live on Sky Sports' dedicated darts channel until ...

Optical sensors are a broad class of device for detecting light intensity. This can be just a simple component for notifying when ambient light levels rise above or fall below a prescribed level, or a ...