4 ms·
There is a purpose-designed Chinese chip exactly for your situation - control brightness of a LED strip based on PWM input. Compared to a bare MOSFET, this chip
by aexaey 10y ago
There is a purpose-designed Chinese chip exactly for your situation - control brightness of a LED strip based on PWM input. Compared to a bare MOSFET, this chip gives you higher efficiency, current-controlled (i.e. flicker-free) output and ability to drive LEDs directly (without current-limiting resistors).
PT4115, pretty cheap on ebay and other usual places.
- Florin_Andrei 10y agoWell, the LED strip I use is a black box (from an electrical perspective). It just needs 12V, no external resistors. So I just hooked it up to 12V via the MOS-FET. The PWM signal from the Arduino (plugged into the MOS-FET) does the job of changing the apparent brightness. No need for magic chips in this context.
- pareidolia 10y agoYour ledstrip probably also consumes about 15 watts per meter since integrated current limiting resistors dissipate most of the energy; a black box with the efficiency of a lightbulb.