4 ms·
To add on to this: We need to regulate the use of PWM modulation in external LEDs on vehicles. Too many manufacturers are using 120Hz - 200Hz modulation frequen
by mastercheif 2y ago
To add on to this: We need to regulate the use of PWM modulation in external LEDs on vehicles. Too many manufacturers are using 120Hz - 200Hz modulation frequency which are easily detectable by the human eye when motion is involved. You'll know when you're looking at a car with PWM headlights when at night they look like they are blurring.
https://www.youtube.com/watch?v=m5JzxjWtFaY https://www.youtube.com/watch?v=m5JzxjWtFaY
- Sohcahtoa82 2y agoWhy do they use PWM instead of simply passing less current?
- aidenn0 2y agoCost. A PWM needs only one external component (a MOSFET), while a current regulator needs multiple.
- Sohcahtoa82 2y agoI admit my knowledge on electronics is pretty basic, but to reduce current, don't you just need a resistor?
- aidenn0 2y agoSo a diode is a constant-voltage device. If you put a resistor in series and run a line voltage above the diode's voltage than the current will be limited by ohms law. But, variable resistors that are rated for a lot of power (roughly half the power of the diodes at max brightness) will add to the BOM.