Topic

power efficiency

2 videos. Ranked by independent recommendations, not by views.

1. 

   1 Thermoelectric cooling: it's not great.

   Technology Connections 3 people · 3 months · since Jan 2025

   Linked whenever someone asks about Peltier coolers, as a clear explanation of why thermoelectric fridges use a lot of power for very little cooling.

2. 

   2 PWM VS Potentiometer! When to use which technique?

   GreatScott! 3 people · 3 months · since Nov 2014

   A GreatScott comparison of PWM against a variable resistor for dimming or speed control, showing how much power a resistor wastes as heat.