Spark Plug Based Project

1.We want to monitor the frequency of the signal which controls the timing of spark plug. Do anyone know from where to tap this anonymous signal and shape and V,I ranges? As it need not be sine wave we think about an external comparator(op-amp) to generate square.

2. And then we have to find the dwell angle. does it vary in current generation bikes (we have to do the work in BIKES). And whether the pulse width of previously generated square wave will give the dwell angle?

3.We need a sensor to monitor the exhaust CO content from vehicle. We find many of them in web. But could not find a particular one which may suit.

Hi,

1) The signal can be taken from the coil`s negative terminal. which will change as a spark occurs between V+ and GND.

2) Please look at the datasheet of the LM2917 or LM2907. In the application notes they have a good design for measuring dwell angle.

cheers

hi i am new here i think your project is great all the best.

Read my postings to this previous thread

for number 3 look here LINK