DIY Buck Converter How to step down DC voltage efficiently
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Date: 2020-09-05
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Comments and reviews: 9
Joshinken
Heres a dumb idea:
I wanna use an esp32 to control an led, but the led needs 5v usb, and the esp32 needs 3. 3v. So i need to step down the 5v to 3. 3v. So i could use this method to use the esp32 to control the voltage of the esp32. Id just need to power it up using a 3v battery, and then it could run on its own.
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Heres a dumb idea:
I wanna use an esp32 to control an led, but the led needs 5v usb, and the esp32 needs 3. 3v. So i need to step down the 5v to 3. 3v. So i could use this method to use the esp32 to control the voltage of the esp32. Id just need to power it up using a 3v battery, and then it could run on its own.
reply
teh
Perfect. Exactly what I was after. I'm currently building my own LED strip light driver and controller. Got an esp32 for wifi and lots of pwm. Using some logic level mosfets in there for switching the 12v but I want to power the entire board from a single 12v DC jack. Need to add a buck converter onto the board.
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Perfect. Exactly what I was after. I'm currently building my own LED strip light driver and controller. Got an esp32 for wifi and lots of pwm. Using some logic level mosfets in there for switching the 12v but I want to power the entire board from a single 12v DC jack. Need to add a buck converter onto the board.
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suunto61
LM2576. Bet you did not know it is double edge modulated and has a non-linear modulator ramp to keep gain constant as input voltage increases. They forgot that when they did LM2596. LM2676 had Vin feed forward, but too much DC gain on the adjustable version. LM22576 and LM5576 were next, then LM22676.
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LM2576. Bet you did not know it is double edge modulated and has a non-linear modulator ramp to keep gain constant as input voltage increases. They forgot that when they did LM2596. LM2676 had Vin feed forward, but too much DC gain on the adjustable version. LM22576 and LM5576 were next, then LM22676.
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Michael
I am a complete rookie trying to figure out how to step down voltage for my 12V camper van lighting. Sounds like a buck converter is what I need. Why is it better than just using resistors? Thanks for making this video.
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I am a complete rookie trying to figure out how to step down voltage for my 12V camper van lighting. Sounds like a buck converter is what I need. Why is it better than just using resistors? Thanks for making this video.
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John
Oh, I was expecting a complete circuit, not an ad for Simple Switcher. Back in the day, there were textbook examples with just transistors. Most famously the Joule Thief Boost converter, so named by bigclivedotcom
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Oh, I was expecting a complete circuit, not an ad for Simple Switcher. Back in the day, there were textbook examples with just transistors. Most famously the Joule Thief Boost converter, so named by bigclivedotcom
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Latrocinium086
Dude you do a great job of breaking these things down, explaining them. Would/could you consider doing a vid on self excited generator. Think youd find it interesting. Thanks again
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Dude you do a great job of breaking these things down, explaining them. Would/could you consider doing a vid on self excited generator. Think youd find it interesting. Thanks again
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Llewellyn
I really enjoyed the way you stepped us through the development of the circuit - very well done. Having checked out your other posts I can see I'll learn a lot here. Subs +1.
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I really enjoyed the way you stepped us through the development of the circuit - very well done. Having checked out your other posts I can see I'll learn a lot here. Subs +1.
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Fidel
May I say thank you for your wonderful video. I don't know much about oscilloscopes but may God keep giving you the tools you need to be able to teach us. Thank you very much
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May I say thank you for your wonderful video. I don't know much about oscilloscopes but may God keep giving you the tools you need to be able to teach us. Thank you very much
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Mark
I wish to power a device which needs 5. 1 volts 3 amp.
I will use 4 3. 7 volt cells so my question is, which would last longer 4 x 3. 7v boosted or 2 x 7. 4v stepped down?
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I wish to power a device which needs 5. 1 volts 3 amp.
I will use 4 3. 7 volt cells so my question is, which would last longer 4 x 3. 7v boosted or 2 x 7. 4v stepped down?
reply
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