I'm thinking about only updating the speed every 250ms and calculate the average for that period.
If fuel level gets below 10% (4 liters, still over 50Km to go) I want to display the fuel level in stead of speed and blink like crazy
If I can display speed and fuel with 3 digits….what else can I do?
I have a Buck-boost pcb that I will try first. This one can be set using a trimpot to a certain (12) voltage. I hope that will prevent the spikes that occur in automotive electronics.
Also...I would like the Arduino to stay on while cranking the engine. This causes a considerate voltage drop and I don't think the buck-boost will be able to manage that. Could something simple like a condensor or simple circuit help there?
Can a capacitor manage the 2-3 second drop in voltage while cranking the engine?
If I use a voltage divider and read the voltage with an input on the Arduino, should I worry about the current?
I'm a big fan of LED's... but not in my Bug
Capacitors...Can a capacitor manage the 2-3 second drop in voltage while cranking the engine? How would I set that up?I like puzzling and have a background in coding...electronics is a whole other game Was hoping the buck-boost convertor I got can handle it, but haven't tested it in the car yet.
You've got high voltage for the nixie tubes so NE-2 or some such would seem like the obvious way to go.
If the buck converter is giving you 5 volts for the Arduino directly (implying ~7 V minimum into the converter), I'd be really surprised if the battery voltage sagged enough while cranking to give you a problem. Even if you go buck converter to the regulator input to the Arduino, I'd expect it to work with a battery sufficiently healthy to start the car.
No. Compared to 70 ohms, the 10k and 15k resistors draw trivial current.
I was planning on using 12V and a 150 Ohm resistor. The voltage divider consist of the 150 Ohm resistor, and the fuel sender resistor. Voltage would be between 0 and 5V.. Current would be up to 80mACode: [Select]12V --- 150 ---|--- 10R-70R --- GND | | Arduino inputIs this possible?
12V --- 150 ---|--- 10R-70R --- GND | | Arduino input