Yung L298N is the default motor driver pick para sa Arduino projects. Pero may quirks na alam ng mga matagal nang gumagamit, hindi obvious for first-timers. Apat na common improvements:
Wag galing sa Arduino yung motor power. Biggest mistake. May dalawang power inputs ang L298N: VCC (logic, 5V from Arduino) at VS / +12V (motor supply, separate). Pag yung motor mo nakapasok via Arduino's 5V pin, kulang ang current at mainit agad yung board. Use a battery pack or wall adapter para sa motor side. Common GND with Arduino — importante.
Heatsink. Mga 2V drops yung L298N across each output (BJT-based design pa siya, older topology). Pag mataas yung current, yung 2V drop becomes heat. Maliit na heatsink with proper thermal paste = significant na temperature drop. Karamihan ng breakout boards may kasamang heatsink — check mo lang na dikit talaga, hindi loose.
Use the onboard regulator. Pag may 12V supply ka na, check yung "5V enable" jumper. Pag enabled, yung onboard regulator gives you a clean 5V para sa logic side galing sa parehong 12V input. No need pang separate USB to power the Arduino.
PWM whine. Yung default Arduino PWM frequency (~490Hz on most pins) is in audible range, kaya may high-pitched whine yung motors. Higher PWM frequency tinatanggal yan. Pwede natin gawan ng separate thread kung interested kayo sa code-level details.
Ano motors gamit niyo with the L298N? Curious din kung may workarounds kayo for current limits or heat.
L298N mainit sobra at slow yung motors — paano mai-improve?
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circuitrocks
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tito_elmer
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Maganda yung writeup sa L298N. Adding from years of using these:
Yung L298N may bad reputation kasi binabra-abuse ng mga tao. Pag respeto mo yung limits (2A per channel max, 4A combined), malinis yung heatsink at properly thermalled, hindi mo i-run past 80°C — easily 5+ years yung lifespan. Yung 12V hydraulic gate controller namin sa bukid, 8 years na akong gumagamit ng L298N — magre-reset kapag may brownout, otherwise tahimik.
Yung "BJT-based, drops 2V" criticism is fair pero honest design. Predictable yung L298N parati — alam mo kung ano makukuha mo. Predictable, well-documented, easy to debug. Yung mga "modern" MOSFET drivers, pwedeng mag-fail in weird ways pag may inductive kickback na hindi well-clamped.
For beginners, recommendation ko parati: master the L298N first. Pag-aralan kung anong itsura ng overcurrent, kung anong tunog ng overheating (yes, naririnig mo yung change ng buzz ng transformer pag mainit). Tapos pag inabot mo na yung limits, alam mo na kung bakit at kung anong features kelangan mo.
Yung L298N may bad reputation kasi binabra-abuse ng mga tao. Pag respeto mo yung limits (2A per channel max, 4A combined), malinis yung heatsink at properly thermalled, hindi mo i-run past 80°C — easily 5+ years yung lifespan. Yung 12V hydraulic gate controller namin sa bukid, 8 years na akong gumagamit ng L298N — magre-reset kapag may brownout, otherwise tahimik.
Yung "BJT-based, drops 2V" criticism is fair pero honest design. Predictable yung L298N parati — alam mo kung ano makukuha mo. Predictable, well-documented, easy to debug. Yung mga "modern" MOSFET drivers, pwedeng mag-fail in weird ways pag may inductive kickback na hindi well-clamped.
For beginners, recommendation ko parati: master the L298N first. Pag-aralan kung anong itsura ng overcurrent, kung anong tunog ng overheating (yes, naririnig mo yung change ng buzz ng transformer pag mainit). Tapos pag inabot mo na yung limits, alam mo na kung bakit at kung anong features kelangan mo.
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circuitrocks
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Yung L298N motor controller is one of our best-sellers — exactly because of what Tito Elmer said: predictable and well-documented.
Yung apat na improvements sa original post yung standard advice na binibigay namin sa mga customers nagtatanong kung bakit mainit yung sa kanila. Nakakatuwa na nag-uusap kayo dito.
Para sa projects na lalapasan na talaga yung L298N (high-current, battery-efficient builds), pinag-aaralan namin mag-add ng modern MOSFET-based drivers sa lineup. Drop niyo suggestions sa Site Feedback kung may specific chips kayong gusto sanang i-stock namin.
Salamat sa thread!
Yung apat na improvements sa original post yung standard advice na binibigay namin sa mga customers nagtatanong kung bakit mainit yung sa kanila. Nakakatuwa na nag-uusap kayo dito.
Para sa projects na lalapasan na talaga yung L298N (high-current, battery-efficient builds), pinag-aaralan namin mag-add ng modern MOSFET-based drivers sa lineup. Drop niyo suggestions sa Site Feedback kung may specific chips kayong gusto sanang i-stock namin.
Salamat sa thread!