EEVblog #869 - Counting LED Photons!

How may photons does a LED emit at very low currents? What is the lowest current where a LED will actually emit photons? Dave does some measurements to answer this quantum physics level stuff! Forum: !/ EEVblog Main Web Site: The 2nd EEVblog Channel: Support the EEVblog through Patreon! EEVblog Amazon Store (Dave gets a cut): T-Shirts: 💗 Likecoin – Coins for Likes: @eevblog/dil9/hcq3 Теги: eevblog,video,led,photon,quantum physics,measurement,how it works,light emitting diode,photon counter,recombination,bandgap,voltage,band gap,valence band,conduction band,electron,hole,p-type,n-type,doping,construction,red led,counting