I decided to open source my stand alone VP44 electronics project. I started a github repository.

It's far from a bolt on replacement. It's just a prototype but it has been running reliably for a couple of

years now. Unfortunately, it's not a project for beginners and requires good soldering experience

and there is one surface mount part on the board. The circuits have some high energy parts and requires some testing

before operating. The software is not simple and has time critical routines. An in depth understanding of  the MCU

internal peripherals (timers, PWM) is also required. Any mistakes in assembly or coding can cause permanent damage to the fuel

solenoid or speed sensor.

 

My project explores the electrical operation of the mysterious VP44. I included some diagrams and tutorial.

The mechanical operation is described on various websites so I skipped it. It may help to review some of those sites.  

 

https://github.com/Greatwrk/VP44-EXPLORER

 

 

Wow! That is awesome. I am very impressed and was shocked to hear this thing run so smoothly. I’ll be honest, I’m going to start building it to play around as I restore this old Cummins. Very impressive, thank you for sharing the build with us, you absolutely didn’t have to and we all tinkerers appreciate it.

 

And thank you for your advice and help!