paul w

Hi,

Has anyone made a knock detecter.Must be simple enough for one of you electronics guys to do.Is it just a mike converting noise to volts and then fairy lights.John,scott what do you reckon?

Cheers Paul

Will search the net as someone must have tried

john banks

Someone built one, can't remember who. The circuit is floating somewhere. There is a simple bandpass filter at about 6-7 KHz IIRC and a LM3914N bargraph LED driver.

paul w

Hi john,

What exactly is the filter,does it convert frequency to volts? and could you take a feed from ecu or oem sensor.

Cheers Paul

john banks

Use a separate one. Search google on bandpass filter.

Deep Singh

If someone was to put one together,having an audible alarm when you hit orange or red would be a real step forward.

john banks

I was going to make up a water trigger for Andy F's car, but in the end with the other mods he did not need the water. In hindsight, you need a bit of advance warning to get the water going and by the time you are on anything over green the det can happen very quickly.

In a similar way you could drop the duty cycle, but unless the system learned it would be after the event.