Adjustable voltage vehicle power supply unit for dirt cheap

[@arthurmeltzer1503]

Followed your directions. The only step you left out is you have to reconnect the white pins after soldering the bridge between the two small components. Otherwise great directions.

[@mjk9674]

Did you test it with an Oscilloscope to determine if the power is clean enough for programming?

[@user-xw6cr4pu9m]

Is a power supply needed to do a vehicle handover when installing a new steering module?

[@zzzly4038]

@neilcampbell6855 it seems like my reply won't go through . if you can't find Dps-750eb you can get dps-700eb A rev instead

[@zzzly4038]

hi the power supply need to be DPS-750EB ? it so hard to find a good deal on those

[@neilcampbell6855]

I just checked too; $205 on AMZ

[@zzzly4038]

@@neilcampbell6855 I went with dps-700eb instead got 2 for $40 and it work just fine for my Macan.

[@zzzly4038]

@@neilcampbell6855 i went with DPS-700EB A REV. Found 2 for $40 and work great for my Macan. it use DC-1749 daughter board instead of DC-2173. you can search "DIY Power Supply for Flashing & Coding" someone did a great job at explaining

[@jimcytube]

Hi there, first of all I’d like to say this is a great video and thank you for sharing this which blessed us all from spending tons on the normal PSU. I have just a slight question, as you’ve added 1k resistor to increase the voltage. (Adding 1k gives me 14.2v) can I add let’s say 900 ohms instead of the 1k ohm to get output voltage around 13.8v? I’ve did the minor adjustments on the side knob as you’ve mentioned but the lowest i can go would be 13.92v. So yea just wanted to make sure if lowering the resistor would bring me a lower output voltage. Thank you very much in advance

[@Hockinsonjohn]

Thank you for the kind words! Yes, you're on the right track with your thinking. By using a lower resistor value, you can fine-tune the voltage to your desired level. Since you’re aiming for around 13.8V, replacing the 1k ohm resistor with a 900-ohm one should help reduce the voltage. Resistors essentially act to limit the amount of adjustment range, so a slightly lower value will allow the output voltage to drop a bit more. Just make sure to do it gradually and monitor the voltage closely as you test. It’s always good to measure as you go to ensure you hit the exact voltage you’re aiming for. Good luck with your project!

[@Froztinc]

I was quoted 6k at the dealer to replace the TCU on my wife's Macan i said a quick "NOPE" so now i have went down the deep rabbit hole of learning to get this appropriately replaced and programmed but if it is just the wiring harness then no need for reprogramming. I'll be building this for sure and updating once i get the time to get started on everything.

[@TomorrowsTek]

If it were a Panamera I have a tcu just sitting in the garage I’d give you. Good luck on your voyage. It’s a pretty simple process if you have your own piwis. Let me know if you need one. A good friend of mine sells them very reasonably and will get it set up and configured properly for you.

[@deba86able]

​@@TomorrowsTekhello, am intrested in one of those,what wil Coast one to send to Norway.?? Pay pall??

[@TomorrowsTek]

@@Froztinc how did that work out? The programming with piwis is pretty good. I just purchased a 2017 Macan turbo from an auction last week. 60k miles little front end damage and roof airbags were deployed.

[@Froztinc]

@@TomorrowsTek Unfortunately just as i was about to tackle this project on i found out i had colon cancer and immediately needed surgery. My body doesn't feel the same anymore and the treatments are expensive so it has taken most of my savings away for now.

[@buna4763]

Hi John, hope you can help. I bought the same unit and tried to reproduce all the steps from your video. I ended up having the led light color red, so I decided to remove the resistor and the soldering on the DC-2173 board. After doing so the led turned green and I could adjust the unit to 14.20 V. Do you see any problem with this setup? Thanks

[@TomorrowsTek]

As long as your able to adjust. I don't see anything wrong with that. Great work

[@KenW-c7t]

Hello John, awesome vid I ordered everything as prescribed from Amazon today looking forward to building this unit, thanks for all your help

[@TomorrowsTek]

Good luck brother.

[@KenW-c7t]

I received my Amazon order yesterday and built this unit step by step as explained in the video and it works perfectly...Thanks!

[@TomorrowsTek]

@@KenW-c7tthat’s awesome news brother. Glad it worked out for you

[@andoo1989triboi]

Hi, I've build this device as well, based on that 6speedonline and it worked fine when I used it first time, but soon after (15 min coding) the battery indicator light up and it was looking like the power supply could not keep up with PIWIS. Have you come across this issue? I did not make a hole to adjust that controller, that is one nice idea. Did you have to make multiple adjustments on that, that you figured you'll need a quick access like that? Thank you for the video and tips - priceless!

[@neilcampbell6855]

I just built this last night and right out of the gate it made 14.2V with no load. I turned the pot all the way counter-clockwise and it went up to 14.3. I wonder if your battery was low and the PS was trying to run the car + charge the battery? Did you kill all the extra electrical loads like lights, radio, fan, seat heater etc?

[@jaromor8808]

I wish you had shown *how* you connected the power supply to the battery... And what was the cable you connected the last... The negative electrode? I read that one is not supposed to connect the wires from the power supply directly to the battery: _"The power supply must be connected to the terminals in the engine compartment. DO NOT connect directly to the vehicle battery."_ I am completely untouched by this stuff, and I plan to do some flashing in a couple of weeks. (Not a Porsche though.) Cheers

[@JorgeLetelier-pf3we]

Traducircastella o

[@TomorrowsTek]

Thanks for your support.

[@t-tanking2258]

Hello !! Nice video thank you for taking time to do it.. just one question were did you plug the little screen that shows the voltage … did i miss it ? Thanks man!!

[@TomorrowsTek]

On the pos and neg leads

[@thomashelm6931]

Hey John. Thanks for the video! I'm a little familiar with electronics, being involved with ham radio. Anyway, I just picked up a icarsoft por2. Do you use anything like this for your Panamera?

[@TomorrowsTek]

Yea I started off with the por. I used it to reset my oil light. Its good for checking basic obd alarms. If you want a video I can cook one up for you.

[@thomashelm6931]

@@TomorrowsTek next time you need to use it, it might be something of interest to other people, as well. I've got to check engine light, that I thought was associated with my gas cap warning. Replace the gas cap, still have the engine light.

[@TomorrowsTek]

@@thomashelm6931 not a problem I have a few alarms on mine right now. We have company over today, but when they leave tomorrow, I'll pull it out and do a little guide on it. We will see if we can help you clear yours.

[@thomashelm6931]

@@TomorrowsTek fantastic! Appreciate it very much! I don't know how radically different our testing devices could be, not much, I would imagine. I believe there is a menu selection for clear all faults. I've tried to do that, it pauses and says that it can't clear all of them. My description may be confusing but any content regarding clearing faults would be great. I've gone down the rabbit hole, scrolling through about every menu and sub menu there is. Maybe I just need to take it to a mechanic and have them deal with it. But, like you, I try to do it myself before getting to that point. Thanks again!

[@johnbrennan7175]

Poor soldering, not flux was used and soldering iron bit to big

[@TomorrowsTek]

I am not a soldering master at all. very little experience sorry.

[@n9nes6x69]

Hey John I would appreciate any feedback. 2015 Macan S seems like the transmission is locked can’t shift into any gear. Been going on a year and can’t solve it. Replaced all solenoids circuit board filter fluid etc. Bought PIWIS 3 clone and am currently making your power supply to help code.