QUOTE(gtp777 @ Nov 6 2017, 12:20 AM)
If in KL traffic and Melaka weekend traffic, plenty of times.... QUOTE(constant_weight @ Dec 5 2017, 06:18 PM)
None of the above. It is due to camera refresh rate not sync with the LED light refresh rate much higher.
Not sure you have electeonics background. LED, light emitting diode is a diode which have a constant voltage drop regardless what voltage you apply. Typically 0.7V from general text book, but it really depends on doping of the junction.
Anyway ingore the theory, we can't control the LED brightness by contol the voltage which reduce the current like the resistive incandescent bulb. We need a modulation circuit which flash it on/off. This is what we usually called LED driver.
This applies for any LED. Car, household, traffic light, you name it.
Wait, this is FnF thread or electronic thread Not sure you have electeonics background. LED, light emitting diode is a diode which have a constant voltage drop regardless what voltage you apply. Typically 0.7V from general text book, but it really depends on doping of the junction.
Anyway ingore the theory, we can't control the LED brightness by contol the voltage which reduce the current like the resistive incandescent bulb. We need a modulation circuit which flash it on/off. This is what we usually called LED driver.
This applies for any LED. Car, household, traffic light, you name it.
But thanks for the info, didn't bother to find out how the LED driver works even thought I'm part of the development team for my company LED driver products
Dec 6 2017, 02:10 PM

Quote
1.0720sec
0.72
7 queries
GZIP Disabled