OK, no onto the dumb stuff/ nerdy tech stuff that some people might get grumpy about. oh well.
I came ( from the title ) from building gasoline cars, loved building engines, and making loud noises. when I was younger.........things change.
so, I am of the era where technology is my playground. I built cars with a group of mechanics spanning 50 yrs of automobile history and technology. I was the one that tuned the EFI systems, I was the one that built the wire harness's. The one that turbo charged EVERYTHING. They were the ones with the base knowledge, of carbs, ignition, and just "how to make things work, mechanically" which was an amazing time and I love them dearly.
ok to the point. Noise, even though I realllllllly enjoy the silence the leaf presents while driving...... there is part of me that wants to change it and make it unique. So, the pedestrian warning sounds, or the ding, dong. or the weird aura sounds. ALLL EVS have sounds to let people know they are there and on. But they are horrible most of the time. Highend EV's have really cool sounds most of the time, and sound way more fun.
( let me preface this with I do NOT condone removing the system, or stopping the factory system. My idea is to still have it, but change it. )
borla makes this system for the mustang E, but good gAWWWWD the price. and its oddly not avaiable it seems. ( reading up on the laws, there is some confusion on if you CAN modify these sound systems )
borla ev exhaust
anyways, I set out to create a unit that uses minimal input so its less car specific, but could produce a different warning sound for low speed, accel, and decel.
it evolved kinda rapidly from a MPU 6degree of freedom g sensor idea to reading the OBD port for data.
so currently this is way in development, its progressing nicely but im only able to work on it a few hours a week
build in the videos was arduino nano - sdcard breakout - 6dof sensor - small opamp - small speaker
you can get the concept from the videos, but the project has morphed to the still image version as Im trying to get data and needed a screen to read what the adapter was seeing.
So the idea is this, from start up you get the Jetsons door bell chime. thats at power up. when idling or slow speed ( dependant on MPH reading ) you get the accel sound, which pitch changes as a multiplier if your speed is increasing rapidly. this works in reverse for decel, from say 20mph down to 0, the sounds would be reversed pitch and slowed. the idea was, even though the dings and the pings are proven by nissan to alert people. The gear head in me says
"yeah, but we can make it sound cool "
the end result of this isnt a product to sell, its for me. but I am more than willing to share the build to anyone else.
eventually it will land in a project box, the small speaker/amo mounted in the engine compartment ( underhood ). and connected to an OBD splitter under dash to a freematic OBD2 - arduino UART adapter.