Hi. I want to use the Arduino Uno to build a Spark-Ignition-System.
I'd like to use a common ignition-coil to create the Sparks(6 V Power Supply).
As far as I can say, it should work that way:http://s7.directupload.net/file/d/3042/don2ky93_png.htm
(sorry couldn't use the img-function?)
My questions are:
-Is the capacitor needed? I've read that they should be parallel to the coil to improve the performance?
-I'm not sure about the transistor. I want to separate the ignition-circuit and the arduino circuit? Safety(for my board (: ) first.
-I put a question-mark in the circuit. The idea of this ignition-system is to use the inductive voltage to create the sparks. As far as I know, these are ways higher than the original voltage.
Should i put a diode there to protect the transistor?