Building your own knock sensor headphones

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Bgtym
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Re: Building your own knock sensor headphones

Post by Bgtym » Wed May 13, 2015 10:38 pm

where to install a microphone? how to install? simply hang the near the intake manifold
better to plug in a microphone and headphones to a notebook? or amplifier Jaycar KC5152 better suited to this task?

Matt
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Re: Building your own knock sensor headphones

Post by Matt » Thu May 14, 2015 10:48 pm

Install microphone in long plastic tube and place near intake of engine.

You could try a notebook. I just made a dedicated unit because its portable and cheap

Tengis
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Joined: Thu Oct 23, 2014 2:21 am

Re: Building your own knock sensor headphones

Post by Tengis » Wed Jul 08, 2015 6:19 am

Matt, what do you think about connecting two microphones? Putting one near the front of the engine and one near the back.

I FINALLY got all my stuff I ordered from Jaycar (I dont know why it took so long) but Im going to be assembling it soon. There was a minimum order amount so I bought two microphones and some other crap.

Matt
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Re: Building your own knock sensor headphones

Post by Matt » Wed Jul 08, 2015 4:48 pm

I'm not sure... let us know!

adamky
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Re: Building your own knock sensor headphones

Post by adamky » Wed May 18, 2016 4:53 am

I recently made my own set of these using the same headphones that you used. Actually, I had already done this several years ago using one of those personal sound amplifiers, but I had issues with alternator whine/noise feeding into the line and never got around to fixing that. So, this time, I used some shielded "CAT7" Ethernet cable. This stuff is double shielded and really great at minimizing EMI interference: http://www.amazon.com/Tera-Grand-Shield ... detailpage. I used two of the 8 wires to connect right where the harness connects to the little knock sensor sub-harness and then grounded the shielding to the head. I tested it and the alternator whine is gone and I can hear the engine perfectly now. Looking forward to testing them out.

Matt
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Re: Building your own knock sensor headphones

Post by Matt » Wed May 18, 2016 10:13 pm

Good stuff. The shielded cable type is important as I had similar issues with engine noise until going to a better quality (higher shielding) cable

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