Voltlog #197 - Wiring LEDs Correctly Series vs Parallel - YouTube
Light-emitting diode - Wikipedia
Light Emitting Diode or the LED Tutorial
Light-emitting diode - Wikipedia
Fast flashing LED as a voltage divider signal for more LEDs light as signal voltage rises circuit - YouTube
Okoljski aktivisti, ki so na Arktiki snemali dokumentarec o ledenikih, ki izginjajo zaradi globalnega segrevanja, končali ujeti v zaledenelem morju | Nova24TV