Using Arduino to control AC Delco/GM DR44G Alternator via PWM
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- เผยแพร่เมื่อ 4 ต.ค. 2024
- Using a Arduino I have been able to send the correct PWM signal to the DR44G alternator. This makes it possible to charge at 14.5v rather than the debug mode of 13.7v. This was done in a 1989 S10 4.3 Auto, I had installed electric fans but realized the original alternator wasn't strong enough to keep up. I had a AD244 from my 5.3 Tahoe motor (that I plan to LS swap into the S-10), but sadly it was not good. Found this DR44G from a 06 Silverado for sale on Craigslist for $20 but didn't realize it was computer controlled.
So my code is on pastebin at pastebin.com/ci...
You will need to load a library as well that will allow you to specify the duty cycle to the exact frequency. Library is here forum.arduino.c...
Pretty simple, I'm sorry it took me forever a bit after I uploaded this video I reinstalled windows and forgot to backup my Arduino sketches.
You could add a potentiometer to control duty cycle so you can turn generation down when you floor it so the alternator drag is less! Or turn it up if you are using a. Electric winch! Very cool project! Keep it up!
Nice project, congrats!
love to learn more on the code used and other based articles. Love to give this a go myself. Have a UNO laying around to try.
nice work!
Awesome vid! I know this is a old video but do you recall....when you cut the wire between the ECU and alt to tap in your new controller....didn't the ECU throw a code since it's got a alt wire that's now not hooked to anything?
Old video but came across it to learn how to wire a pwm on a buddies to convert to lithium. However on your setup you could have just swapped the regulators to the 4pin. But good job none the less!
very nice video, this is a great DIY project
I see you have both wires hooked up The L gos to the pwm signal, what do you have the F wire hooked up to?
GREETINGS.... WHAT VOLTAGE COMES OUT FROM THAT PIN 9... THE PWM SIGNAL ALSO CARRIES VOLTAGE... THAT ALTERNATOR REGULATOR HAS A SPECIFIC VOLTAGE AND 12VOL CANNOT BE... WHAT VOLTAGE DID YOU PUT TO THAT PWM PIN 9
I'm impressed
Now Amz has a pwm controller in a small black plastic box. Cost ya about a MCD lunch.
definitely interested in a copy of that code
+BustedCustomz updated my comments finally
I see you have wires going to L and F pins on the alternator. From my understanding L is what you send the 5v pulse to and f sends a signal back to the computer to let it know what the alternator is doing.
I’m having issues getting mine going. Not to sure if I fried it because I have 12v going to each pin before. It defaults to the 13.6v and turns off then it’s not hooked up.
do you mean you got 13.6v from alternator without connect anything to L and F pins? Can it work without control?
My after market ecu could not control a PWM alternator. So I ended up changing the rectifier.
With no signal it just put out low voltage. Enough to run but not enough to keep the battery happy
Great idea. Can you please share the wiring diagram?
Thank you
Did you ever get a response. Im trying to figure out if the second wire connected beside the PSU connection shorts back to positive or negative? its a red wire so Im assuming back to the alt output poz, but Im traveling and Im gonna have one shot at this and I dont wanna blow the arduino board with the wrong polarity
Sorry Never noticed this comment but it should be pin B the pin on the right when the pulley faces you.
Very good video! how do you power up the Arduino ? connect a 5v regulator from another pin of the alternator?
+Yuan Cao since the adruino can run on 12v power I just got a 12v lead from the fusebox that is on when the key is turned on.
Hi friend i need a help, I did the same thing you did on my late model alternator and it works the voltage was 14.3 but it couldn’t stay steady in loads, I turned the head light its became 14.1 then turn the AC and efans and it drops to 13.2, whats the problem with mine ?
It must be a DFM alternator because you cant do this with LIN, COM, BSS alternators they need a complete rewire.
On the other terminal of the alternator where should that be connected to?
How do you wire that alternator to pump out electricity?
you could do the same with a $0.50 555 ic and a component or two.. cost like $5.00, but you doing better than I would. I'm trying to get 24v from a 12 v delco 22si alternators. you know anything about that?
Honestly with my limited knowledge I would assume you could change the internal regulator. Another Idea would be to run 2 alternators in series but I don't know if that would solve your problem.
how would you do this ? will using this method excite the alternator too?
hello there, nice video
i am working on a project with alternator and its controlling. will you please tell me how to learn to program that arduino board
+yatish khare I will update my description with a link to the code once I get a chance.
+yatish khare It's in my comments section now.
have some questions. what is the other wire going to? just a 12v ignition signal?
Kenny Forbes yes just keyed power and the signal that goes from the alternator to the Arduino is all you need
hello great work, how can this work with the 4 pin model?
No 4 pin is analog no control necessary
hi, I tried to copy your codes on my arduino but it shows something wrong
Did you make sure to load the library as well its in my description.
Yes, I downloaded it and it works. But will this going to work in any Gm PWM alternator ? Because Im using the newer ones
I tried to program my Arduino and I would like to see how you did it, I just can't seem to make it work right.
Was hoping the link was available to just plug and play it!!
+J Tate check my comments for the links
Okay.... make it smaller with a smaller Microprocessor! heh,
all you had to do is connect the ground of the 9 volt with the ground of the car battery.
Thanks for the education!
Extibal Flores what part of the states do you live in? are you still planning the 5.3 swap? I'm thinking about a 4.8 swap in a 97 blazer. I'm interested in the 4.3 if you plan to sell it. also I would run another power wire from the alt to battery. like a 8gauge. since the alternator outputs more than the original. on a project I'm working on I'm running 4gauge . maybe even 2gauge from the alt. it will prevent voltage drop in the wire. they came with like 10gauge . I font see how 100amps. or even close to it can go through that small of wire! especially with the under hood temps. and the current going through it. how is the alternator working ? any changes?
James stranger I finished the 5.3 swap in Feb/March. So yes the 4.3 is for sale if you’re interested I live in the Odessa/Midland Area of Texas.
James stranger also it worked fine I was using it to run dual electric fans and it never failed me during the time it still had the 4.3 in it.
Extibal Flores that's a little far from North Carolina. I have heard of ppl just changing the regulators. in concerned about the current. the regulator I don't think can handle the current flow of the rotor. you make videos of the swap. or a video of it finished.?