Hello folks,
I'm completely new to Arduino, but not to some basic electronics. I last worked with flash micro controllers (PLCs) over 15 years ago!
I'd like a recommendation for a software manual - like the old days! PLEASE!
I'm trying to control a stationary engine's speed so that it's rpm remains constant on or off load. I'm using a slit disc photo interupter on the crankshaft to get rotational speed. Using frequency to voltage conversion then comparing this to either a voltage divider input (same PSU as Arduino) or software 'preset' to maintain the rpm (the voltage divider concept would allow a manual control on the fast idle speed during warm up). The output from the Arduino will operate a servo on the carburettor throttle.
Extending my thinking I'd like to be able to control the idle in relation to temp so that I have some 'choke' function with a fast idle. This would seem a simple hardware addition - simply by adding a temperature sensor, but from a software perspective I now have to correlate engine rpm with temperature, and the preset speed and then drive the servo.
The mapping between input and output is therefore not constant - it will vary with temperature - engine speed should reduce to the preset rpm as temperature rises.
I'm not confident with the code to say the least!, but I'll get that eventually I hope!
Does my thinking seem reasonable or can anyone suggest an easier / alternative way?
The Nutty Professor