Updated the relevant bit of code to reflect the actual distance, and changed it from int to float: const float distance = 23.5; // distance covered by the vehicle for every revolution of the drive line I left the MPH variable as int, so that should take care of rounding off the decimals for me. […]

Got an email from my dad this morning, he went out to the shop and measured the forward travel on the old Dodge and found it is 23.5" per revolution of the drive line. A bit higher than the ideal 17", but workable. It occurred to me overnight that doubling the sampling rate and dividing […]

I’m trying to build a set of digital gauges for an old Dodge pickup with a donor engine that does not have ODB II. I’ve been wanting to learn how to program Arduinos, and this seemed like the perfect project for it. I’ve ordered a couple of Arduinos and some parts, but they are all […]