LM317 Adjustable Voltage Regulator Tutorial

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Is there something already made regulate 12s to 2s LiIon voltage?

Still i don't get it, why the pinout don't correspond to the schematics??

seems that a series of voltage regulators would reduce the heat buildup.

regulators...mount up

RIP radio shack

Hey I was concerned I make lm 317 adjustable voltage regulator but it cannot power a load. Even small load. Although I can adjust the output voltage but It doesn't even make the load function. What is the trouble? Sorry for my english

you forgot to mention putting thermal paste between the lm317 and heatsink...

Thanks this help alot

i used this as a constant current and dimmer for my ir led :D

I am having a serious problem with my LM317T. Even with 6 volts difference, it refuses to output more than 170ma of current! It is supposed to easily handle more than an amp! I am even using as large heat sink, and the LM317t is not even getting warm. What could be the problem?

thank you sir! Very useful!!

Love Mr. T's cameo at 0.40😆

i have a 46v transformer can i use it with lm317 to make a voltage regulator

very well described thank you.

The best electronics channel ever. You are above and beyond any other professional or educational provider. While there are professors and mentors I hold as exceptional, none have your personality. Whether deemed basic or intermediate+, your content is proficient and entertaining. Please do more.

thank you

How do you determine that you need those capacitances? Nobody ever explains this 😏

Awesome. I need to step down the viltage (5v to 3.3v) coming from a development board into a wii chuck and I just happen to have one of these ICs lying around.

Is there a place I can buy an all encompassing kit for this ?

Cool video, thank you for sharing :)

I transposed the formula to find R2 not R1. Datasheet and other places show that R1 is 240 ohms. And reference is 1.25. So I let R1 be constant and calculate for R2. I ignored the 50 u * R2 since that is minuscule.

So how do I use this in a 200amprage configuration??

I might be stupid, but how do you come up to that IAdj is 50μA?

This video filled my needs so perfectly

This is a very informative video Sir! However, I am building this as a 24 Volt power supply on a breadboard with a 2 watt load resistor at the end of the circuit in order to simulate a load of about 250mA constant current draw. Given Ohm's law this resistor needed to be 2 Watts in order to handle the current, but what about resistor's R1 and R2 that are connected to the regulator? Can I use 1/4 watt resistors there? Or do they need to be 2 watts as well, considering my circuit draws 250mA?

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can i use a 19 volt adapter?

Would a 25K resistor output 1.25V? That's what I need.

Is 5875 and 1.485 constant values in this equation?

If you replace the potentiometer with a thermistor, then you will have a temperature controlled fan power supply!

What are the components of a cigarette lighter plug USB out phone charger? Pre-made to take 12v and reduce it to 5v, usually 1A, 2.1A and 2.4A outputs. Is there a simple schematic for this? It seems easier to just gut one of those apart and repurpose it in a different project.

Thanks ..👍

Can we make 48v to 24v dc converter using this method and device?

Success! (thanks); used LM338T(5A): R1 = 560Ω/4W(J) = R2=10K Pot... ca. 1 -11V from 12V SMPS... recommended wattage(range) for R1?? (FWIW, tantalum caps)

How can I make 35vdc input to 24 up to 26vdc output? And about this lm317 can use to supply 50inch led t.v?

I just dont get these things. Trying to drive an LED neither the lm317 or the l78s werer able to deliver more than 200mA. If under load they imediadly drop in voltage. Seems like they are somehow regulating the current but how and whyyy

I’m a bit confused, is the Input-output differential just simply your input voltage minus your output voltage? And that determines the drop out voltage?

If the load is constantly changing will it maintain the same output voltage?

What is the difference between this circuit and a potentiometer connected as a voltage divider?

It works great, thank you.

I am confused between constant voltage and constant current control.

Good

It is not clear to me: what is in front of what, exactly. If current flows from the + terminal of a battery, for example, what does that connect to first: the potentiometer, or the voltage regulator?

Your vids are deeply appreciated.
Thanks👍

perfect, I can build a battery charger, and blow things up. It just does not get better than that. Thanks. perfect.

Simple circuit. And my friend watched me pull out of a radio... the parts to regulate a project. Even taught him how to trick fixed chips to going higher with a diode on the ground..

So... This isn’t too far off if the LM317 gets up to 55° (including the heat sink!) after a few minutes when used from a 12v source for a 5v, 0.6A power supply (see video in my channel). 🤔 Wonder how to get around it. Two in parallel?